Abdelali El Aroudi

Abdelali El Aroudi

Universidad Rovira i Virgili

H-index: 38

Europe-Spain

Abdelali El Aroudi Information

University

Universidad Rovira i Virgili

Position

Professor SPAIN

Citations(all)

5308

Citations(since 2020)

1989

Cited By

4106

hIndex(all)

38

hIndex(since 2020)

23

i10Index(all)

112

i10Index(since 2020)

57

Email

University Profile Page

Universidad Rovira i Virgili

Abdelali El Aroudi Skills & Research Interests

Power Electronics

Renewable Energy Systems

PV Applications

Nonlinear dynamics

Automatic Control

Top articles of Abdelali El Aroudi

Hierarchical Control of Power Distribution in the Hybrid Energy Storage System of an Ultrafast Charging Station for Electric Vehicles

This paper presents a two-level hierarchical control method for the power distribution between the hybrid energy storage system (HESS) and the main dc bus of a microgrid for ultrafast charging of electric vehicles (EVs). The HESS is composed of a supercapacitor and a battery and is an essential part to fulfill the charging demand of EVs in a microgrid made up of a 220 VRMS ac bus, two dc buses of 600 V and 1500 V, respectively, and four charging points. A state machine defines the four operating modes of the HESS and establishes the conditions for the corresponding transitions among them, namely, charging the battery and the supercapacitor from the bus, injecting the current from the HESS into the 1500 V dc bus to ensure the power balance in the microgrid, regulating the bus voltage, and establishing the disconnection mode. The primary level of the control system regulates the current and voltage of the battery, supercapacitor, and dc bus, while the secondary level establishes the operating mode of the HESS and provides the appropriate references to the primary level. In the primary level, sliding mode control (SMC) is used in both the battery and supercapacitor in the inner loop of a cascade control that implements the standard constant current–constant voltage (CC-CV) charging protocol. In the same level, linear control is applied in the CV phase of the protocol and for bus voltage regulation or the current injection into the bus. PSIM simulations of the operating modes and their corresponding transitions verify the theoretical predictions.

Authors

Alexandra Blanch-Fortuna,David Zambrano-Prada,Oswaldo López-Santos,Abdelali El Aroudi,Luis Vázquez-Seisdedos,Luis Martinez-Salamero

Journal

Energies

Published Date

2024/3/14

Adaptive Sliding Mode Control for a Boost Converter with Constant Power Load

Output voltage regulation in a boost converter with Constant Power Load (CPL) can be obtained by means of sliding-mode control with a linear estimation loop of the output power. The estimation procedure is a simple integrator of the output voltage error and confers an adaptive nature on the switching regulator. Two switching surfaces of quadratic type are considered to induce the sliding motions, and the corresponding conditions for the existence of both sliding mode and stability of the equilibrium point are derived. The resulting controller can be implemented using simple analog electronics requiring operational amplifier-based circuits in both cases plus a multiplier in one case and a multiplier and a divider in the other case. PSIM and MATLAB simulations show a fast recovery and zero steady-state output voltage error in response to large-signal disturbances in the output voltage and the load power.

Authors

D Zambrano-Prada,A El Aroudi,L Vázquez-Seiszdedos,O Lopez-Santos,R Haroun,L Martínez-Salamero

Published Date

2023/2/19

Passive Damping Stabilization for Constant-Power Loaded Boost Converter

This paper presents a methodology to stabilize an open-loop boost power converter feeding a constant power load. The stabilization is ensured by means of three different passive damping filters, an RC parallel branch placed at the output port, an RL series branch placed at the input, and an RL parallel branch placed also in the input port. The presented methodology allows the design of the system under a pre-defined dynamic behavior and the established size, weight, and cost limitations. Analytical models are obtained for each topology and a theoretical study is carried in order to determine the optimal resistance that ensures the damping of the peak of the output impedance of the converter with each stabilizer. The loci of the poles of the system in the complex plane is studied in terms of the stabilizer parameter values to estimate the dynamics of the complete system. Finally, numerical examples and PSIM …

Authors

M Sebastià-Rullo,A Cid-Pastor,H Valderrama-Blavi,A El Aroudi,L Martínez Salamero

Published Date

2023/6/19

Modeling and design of a photovoltaic‐fed single‐ended primary‐inductor converter for maximum power point tracking with current mode control

In this work, the control of a Single‐Ended Primary‐Inductor Converter (SEPIC) supplied from a photovoltaic energy source and linked at its output to a DC current sink is addressed. The system is used for maximum power point tracking under varying environmental conditions. A strategy based on two loops of control is considered. A peak current mode controller is used for the inner loop, and a Proportional‐Integral (PI) controller is used for the outer voltage loop. Then, a comprehensive time‐domain and frequency‐domain modeling of the inner loop is theoretically addressed and then verified by the switched model of the system implemented in PSIM© software. The obtained results show that the system exhibits accurate tracking of the desired PV voltage while guaranteeing a fast maximum power point tracking under sudden changes in the environmental conditions. The mathematical modeling, design …

Authors

Youssra Rais,Kuntal Mandal,Alia Zakriti,Abdellatif Khamlichi,Mohamed Al‐Numay,Abdelali El Aroudi

Journal

International Journal of Circuit Theory and Applications

Published Date

2023/12/12

Bifurcation Phenomena in Open-Loop DCM-Operated DC–DC Switching Converters Feeding Constant Power Loads

Constant power loading is an effect that appears in multiple-stage energy conversion systems with individually regulated switching power converters. In a two-stage system, an upstream or source converter drives one or more downstream or load converters. The downstream converters in a two-stage power conversion system are designed to provide the fastest transient response in stand-alone operation. Consequently, they behave as a constant power load (CPL) to the upstream converter within their control bandwidth. In the past, open-loop power converters feeding CPLs and operating in discontinuous conduction mode (DCM) were considered to be stable. In this paper, it is shown that these systems can undergo instabilities, which have been so far overlooked. First, numerical simulations from the switched model of an open-loop boost converter under DCM operation and loaded with a tightly regulated buck converter and the same converter loaded by an ideal CPL are presented to show that they exhibit similar nonlinear behavior and bifurcation phenomena. Then, the three elementary open-loop DC–DC converters operating in the DCM were considered and their bifurcation phenomena were revealed. It is shown that the period-doubling route to chaos in the DC–DC boost converter is interrupted by a sudden appearance of dangerous destructive dynamics due to the excessively unlimited load current in the CPL. For the buck converter, only the first period-doubling bifurcation is observed before the destructive behavior appears. The open-loop buck–boost converter under DCM and feeding a CPL is always unstable and exhibits no periodic …

Authors

Abdelali El Aroudi,Luis Benadero,Reham Haroun,Luis Martínez-Salamero,Chi K Tse

Journal

Electronics

Published Date

2023/2/19

Limit‐cycle‐oscillation in DC bus system and its death through heterogeneous coupling

Stability of a complex DC bus system (DBS) is a significant design consideration because of its constant power load (CPL) characteristics of the tightly‐regulated load converter. In this paper, the dynamic properties of a stand‐alone buck‐type DBS are investigated based upon the closed‐form large‐signal‐averaged model. The stability‐analysis‐in‐large around the operation point shows that CPLs create a destabilizing effect on the system that can lead to severe voltage oscillation caused by discontinuity‐induced Hopf bifurcations, which are qualitatively different from the bifurcations we know for smooth dynamical systems. Instead, this paper also explores the application of “amplitude death (AD) technique” to stabilize the coupled oscillatory DBSs and show that how this technique with its necessary modifications, for example, the heterogeneity‐induced AD technique characterized by two or more coupled DBSs …

Authors

Sanjeet Kumar Subudhi,Somnath Maity,Abdelali El Aroudi

Journal

International Journal of Circuit Theory and Applications

Published Date

2023/6

Design of Loss-Free Resistors Terminated at a Generic Nonlinear Static Load

Modern DC-DC power conversion represents an important challenge because connected loads are not purely resistive as it has been conventionally considered. Furthermore, the corresponding power converters perform functions which are not limited to regulate either a specific output voltage or output current. One of these new functions is the transfer of a regulated power to different types of loads, which emerge in the context of microgrids and electric vehicles, in which the sliding-mode control (SMC) is an important actor because of its versality, robustness and systematic design. This paper presents SMC of a boost converter operating as a loss-free resistor (LFR), which supplies a constant power to the parallel connection of three canonical elements, namely, a constant power load (CPL), a constant current load (CCL) and a dc voltage source with internal resistance. The studied load is defined as a generic …

Authors

Oswaldo López-Santos,David A Zambrano-Prada,Hugo Valderrama-Blavi,Angel Cid-Pastor,Luis Vázquez-Seisdedos,Abdelali El Aroudi,Luis Martínez-Salamero

Journal

IEEE Transactions on Circuits and Systems I: Regular Papers

Published Date

2023/9/19

Period adding with symmetry breaking/recovering in a power inverter with hysteresis control

In the present work, we investigate a period adding structure observed in a discontinuous 1D map modeling the behavior of a DC–AC H-bridge inverter with hysteresis control. Supported by experimental measurements from a laboratory prototype, we demonstrate that the structure is partially affected by bistability, so that for some parameter values the system has a single attracting cycle while for other parameter values a pair of attracting cycles of the same period exists. We show that the reason for possible bistability is related to the symmetry of the underlying model. Then, by means of symbolic dynamics, we explain which of the cycles are affected by bistability and which are not.

Authors

Zhanybai T Zhusubaliyev,Viktor Avrutin,Andrey S Kucherov,Reham Haroun,Abdelali El Aroudi

Journal

Physica D: Nonlinear Phenomena

Published Date

2023/2/1

In-depth analysis of smooth and nonsmooth bifurcations for an open-loop boost converter feeding constant power loads in discontinuous conduction mode

This paper presents a study of the existence conditions of limit cycles and mechanisms when losing their stability in an open-loop DC–DC boost converter loaded with a constant power load and operating in discontinuous conduction mode. First, the existence conditions are determined. Then, boundaries associated with different kinds of instabilities such as the classical smooth fold and period-doubling bifurcations and nonsmooth border-collision bifurcations such as fold border-collision bifurcations are elucidated. To perform the stability analysis, an implicit 1D map for the system is derived. From this model, it is obtained that smooth period-doubling and fold bifurcations may occur at certain values of the circuit parameters. Some results from numerical simulations performed on the circuit-based switched model are provided showing consistency with the theoretical analysis from the derived model.

Authors

Luis Benadero,Abdelali El Aroudi,Luis Martinez-Salamero,Chi K Tse

Journal

International Journal of Bifurcation and Chaos

Published Date

2023/3/30

Multi-resonant Controller Design for a PV-Fed Multifunctional Grid-Connected Inverter in Presence of Unbalanced and Nonlinear Load

The use of Active Power Filters (APFs) in future power grids with high penetration of nonlinear loads is unavoidable. Voltage Source Inverters (VSIs) interfacing Photovoltaic (PV) generator could play the APF role in addition to power supply. In this paper, the control of a PV-fed multifunctional grid-connected three-phase VSI is addressed with nonlinear and unbalanced load. The control objective is threefold. The first one is to deliver the maximum available power from the PV source to the grid satisfying power quality standards. The second one is the Voltage Balancing Control for DC-link capacitors to guarantee correct operation of the VSI. The last one is shunt APF control to compensate for nonlinear and unbalanced load harmonics, reactive power, and unbalanced sequences. A quasi-Proportional-Resonant (PR) controller with harmonic compensators is proposed for the current control loop. The quasi-PR controller parameters are determined …

Authors

Seyedamin Valedsaravi,Abdelali El Aroudi,Jose A Barrado-Rodrigo,Mohsen Hamzeh,Luis Martínez-Salamero

Journal

Journal of Control, Automation and Electrical Systems

Published Date

2023/8

Electrical architecture for ultrafast charging station

EVs will play an important role in transport, climate change and electrification. However, there is a consensus that one of the main obstacles to full market penetration of EVs is the so-called range anxiety (fear of not having enough charge in the vehicle). Electric vehicle charging infrastructures have two opposing approaches to their use. For urban routes, where distances travelled, and EV usage times are low, on-board alternative current (AC) chargers (Level 1 and 2) can meet the charging requirements in most situations. The solution is a gradual increase of the existing electrical infrastructure and charging points, together with the integration of new energy sources to cope with the new loads. On the other hand, on highway routes, EVs require large amount of energy in a short time in order to provide a continuous trip. Nowadays, electric charging stations provide fast charging points for vehicles by connecting …

Authors

David Zambrano-Prada,Alexandra Blanch-Fortuna,José A Barrado-Rodrigo,Luis Vázquez-Seisdedos,Oswaldo López-Santos,Abdelali El Aroudi,Luis Martinez-Salamero

Journal

Transportation Research Procedia

Published Date

2023/1/1

Unidirectional DC-DC Converters for Ultrafast Charging of Electric Vehicles

Selecting the converter in the output stage of an ultrafast charging system for electric vehicles (EVs) has to take into account different constraints imposed by the number of charging ports and the type of power distribution (AC, DC or both). This paper discusses qualitative criteria for selecting the most appropriate converter for a given electrical architecture considering different structures reported in the literature. Unidirectional topologies with galvanic isolation such as LLC resonant converter and phase shifted full bridge (PSFB) structure, together with the non-isolated multiphase buck converter are analyzed in detail to establish the adequate electrical architecture for matching.

Authors

O Lopez-Santos,D Zambrano-Prada,L Martinez-Salamero,A El Aroudi,L Vazquez-Seisdedos

Published Date

2023/3/29

A Unified Switched Nonlinear Dynamic Model of an Electric Vehicle for Performance Evaluation

The advanced modeling and estimation of overall system dynamics play a vital role in electric vehicles (EVs), as the selection of components in the powertrain and prediction of performance are the key market qualifiers. The state-space averaged model and small-signal transfer function model are useful for assessing long-term behavior in system-level analysis and for designing the controller parameters, respectively. Both models take less computation time but ignore the high-frequency switching dynamics. Therefore, these two models could be impractical for the development and testing of EV prototypes. On the other hand, the multi-domain model in available simulation tools gives in-depth information about the short-term behavior and loss analysis of power electronic devices in each subsystem, considering the switching dynamics in a long computation time. In this paper, a general mathematical framework for the dynamical analysis of complete EVs is presented using a unified, switched nonlinear model. This equation-based model runs faster than the available module-based simulation tools. Two other models, namely the time domain state-space averaged model and frequency domain small-signal transfer function model, are also developed from the switched nonlinear model for the analysis with less computation time. The design and performance of an EV with two different motors and its controllers are evaluated using the general mathematical framework.

Authors

Dibyendu Khan,Kuntal Mandal,Anjan Kumar Ray,Abdelali El Aroudi

Journal

Electronics

Published Date

2023/7/21

Outlook of lithium-ion battery regulations and procedures to improve cell degradation detection and other alternatives

This article constitutes a relatively new perspective that has emerged from the need to reduce environmental pollution from internal combustion engine vehicles (ICEVs) by reinforcing the fleet of electric vehicles (EVs) on the road. Future requirements to exclusively use zero-emission vehicles have resulted in the necessity of enhancing the testing and monitoring process for EVs in order to release reliable devices. The unpredictable response of lithium-ion batteries (LIBS), future lack of raw materials, and inconsistencies in the present regulations must be reviewed and understood in order to develop enhanced batteries. This article aims to outline the future perspective of nonconventional vehicles monopolizing the roads by year 2035 in order to eradicate CO2 emissions by year 2050.

Authors

Maria Cortada-Torbellino,Abdelali El Aroudi,Hugo Valderrama-Blavi

Journal

Energies

Published Date

2023/3/4

Robust Control of Cascaded H-Bridge Multilevel Inverters for Grid-Tied PV Systems Subject to Faulty Conditions

This letter deals with the design and implementation of a robust control approach for grid-tied PV systems. The main controller’s objectives are to inject the maximum available power to the grid, whilst guaranteeing power quality even under faulty conditions. To this end, a multi-loop regulator is designed for the Cascaded H-Bridge Multilevel Inverters (CHBMIs) by combining a sliding mode control strategy for maximum power point tracking and a Lyapunov approach for Power Factor Correction (PFC). Validation of the proposed approach using MATLAB/SimPowerSimscape environment confirmed the ability of the proposed approach to successfully accomplish its objectives in terms of references tracking and regulation under both matching and mismatching irradiation levels as well as faulty modes stemming from the photovoltaic (PV) panels and/or the dc-dc converters. Additionally, the proposed approach was …

Authors

Hanane Katir,Abdelmajid Abouloifa,Elhoussin Elbouchikhi,Afef Fekih,Karim Noussi,Abdelali El Aroudi

Journal

IEEE Control Systems Letters

Published Date

2023/6/21

PV-powered grid-tied fault tolerant double-stage DC-AC conversion chain based on a cascaded H-bridge multilevel inverter

This paper is dedicated to a comprehensive study of a complete DC/AC conversion chain. Motivated by the high power demand of a variety of industrial applications, this work puts an emphasis on a double stage conversion system composed of N photovoltaic energy supplies, N DC-DC boost converters, a DC-link containing N capacitors, N H-bridge inverters connected in cascade forming the core of the structure, an LCL filter and an electrical grid. With the use of an appropriate regulator, the following control objectives are aimed to be achieved: i. the extraction of the maximum available power via the regulation of the voltage across the PV panels, ii. the fulfillment of a unitary power factor, iii. the regulation of the DC-link voltage to a desired reference. Reaching the pre-mentioned objectives requires the design of a multi-loop regulator that upgrades the features of the system under investigation to work under …

Authors

H Katir,A Abouloifa,K Noussi,I Lachkar,A El Aroudi,F Giri,C Aouadi,M Aourir,F El Otmani

Journal

IFAC-PapersOnLine

Published Date

2022/1/1

Nonlinear control design and stability analysis of single phase half bridge interleaved buck shunt active power filter

This paper deals with nonlinear control of a single-phase half-bridge interleaved buck shunt active power filter (HBIB-SAPF) with a nonlinear load. The control objective for the system is twofold: performing power factor correction by compensating for harmonics and reactive current consumed by the nonlinear load from one hand and tightly regulating the HBIB converter DC capacitor voltage. Both objectives are accomplished using a two-loop nonlinear controller. The inner loop acts on the switching devices so that the active filter current tracks its reference with the aim of ensuring a unity power factor. This loop is tackled using backstepping technique and Lyapunov approach. The outer loop is responsible for regulating the DC capacitor voltage to its desired value, using a PI controller with a pre-filter. The stability analysis of the closed-loop system is formally performed by using the averaging theory. The validity of …

Authors

Salwa Echalih,Abdelmajid Abouloifa,Ibtissam Lachkar,Zineb Hekss,Abdelali El Aroudi,Fouad Giri,Mohammed S Al-Numay

Journal

IEEE Transactions on Circuits and Systems I: Regular Papers

Published Date

2022/2/10

Noise-induced and border-collision-induced bubbling

Suddenly appearing high-frequency low-amplitude phase-restricted oscillations disturbing the waveform of signals in many kinds of power converters, also known as bubbling, have been recently shown to appear not at the points of smooth bifurcations, as previously assumed, but soon after. In the present work, we investigate further reasons for the onset of bubbling. We show that the presence of long phase intervals associated with expanding functions modeling the system’s behavior leads to a strong amplification of any kind of disturbances, causing noise-induced bubbling to appear both in physical experiments and in numerical simulations. Furthermore, we show that the onset of bubbling may be caused by persistence border collision events.

Authors

Viktor Avrutin,Lasse von Schwerin-Blume,Zhanybai T Zhusubaliyev,Reham Haroun,Abdelali El Aroudi

Journal

Physica D: Nonlinear Phenomena

Published Date

2022/7/1

Stabilization of a PV Fed Current Mode Controlled SEPIC with MPPT Using Piecewise Quadratic Slope Compensation

Instabilities in the form of subharmonic oscillations are addressed in this paper for a Single-Ended Primary Inductor Converter (SEPIC) used for Maximum Power Point Tracking (MPPT) in a Photovoltaic (PV) system under current mode control. It is widely known that this kind of system may exhibit undesired subharmonic oscillations when the duty ratio is larger than 50%. Piecewise quadratic (PWQ) slope compensation technique has been proven to be an efficient technique for eliminating this kind of undesired behavior in DC-DC switching converters. With this technique, the stability of the converter is guaranteed for all values of the duty ratio. In this work, the technique is applied on a SEPIC supplied from a photovoltaic energy source and linked at its output to a DC load. Under varying environmental conditions, the system is used for MPPT. A peak current mode controller is used for the current loop whose reference …

Authors

Kuntal Mandal,Abdelali El Aroudi

Published Date

2022/11/22

Advanced nonlinear control of single phase shunt active power filter based on full bridge dual buck converter

An advanced nonlinear control design of a single phase shunt active power filter based on a full bridge dual buck converter (FBDB-SAPF) is presented in this paper. The main control objectives are: i) compensation of harmonics and reactive power consumed by nonlinear loads aiming at satisfying a near unity power factor at the grid side, ii) regulation of the dc bus voltage to a desired value. To meet the above objectives, the proposed controller has two loops in cascade. The sliding mode approach based on the average state system is used in the inner loop for dealing with the compensation issue and performing PFC. In the outer loop, a filtered proportional-integral is applied to regulate the dc bus voltage of the FBDB-SAPF. The performance of the closed-loop system is tested via Matlab/ SimPowerSystems. The obtained results prove that the suggested controller achieves its objectives and demonstrate its …

Authors

S Echalih,A Abouloifa,Z Hekss,I Lachkar,A El Aroudi,F Giri

Journal

IFAC-PapersOnLine

Published Date

2022/1/1

A Grid Connected Solar Photovoltaic System with Multilevel Shunt Active Power Filter for Power Quality Enhancement

This paper presents a shunt active power filter based on a three-phase 3-level Neutral Point Clamped (NPC) inverter for grid-connected Photovoltaic (PV) systems. The main objectives to be met are: i) Ensuring maximum power extraction from the PV panels, by forcing the voltage across the PV panel to track a suitable reference provided by P&O algorithm; ii) Assuring Power Factor Correction (PFC) by forcing grid currents to be sinusoidal and in phase (or opposite phase) with grid voltages. In order to achieve these objectives, a cascade control strategy with two imbricated loops is designed. Lyapunov approach and sliding mode control are used in the inner loop to meet the PFC requirement. As for the outer loop, it is designed using the PI regulator and P&O algorithm to satisfy the voltage regulation objective. Lastly, simulation results are performed in the MATLAB/SimPowerSystems environment to demonstrate the effectiveness of the proposed controller. Copyright© 2022 Praise Worthy Prize Srl-All rights reserved.

Authors

A Elallali,A Abouloifa,I Lachkar,A El Aroudi,C Taghzaoui,Y Mchaouar,M Aourir

Journal

Int. Rev. Automat. Control (IREACO)

Published Date

2022

Control design and parameter tuning for islanded microgrids by combining different optimization algorithms

Load and supply parameters may be uncertain in microgrids (MGs) due for instance to the intermittent nature of renewable energy sources among others. Guaranteeing reliable and stable MGs despite parameter uncertainties is crucial for their correct operation. Their stability and dynamical features are directly related to the controllers’ parameters and power-sharing coefficients. Hence, to maintain power good quality within the desirable range of system parameters and to have a satisfactory response to sudden load changes, careful selection of the controllers and power-sharing coefficients are necessary. In this paper, a simple design approach for the optimal design of controllers’ parameters is presented in an islanded MG. To that aim, an optimization problem is formulated based on a small-signal state-space model and solved by three different optimization techniques including particle swarm optimization (PSO), genetic algorithm (GA), and a proposed approach based on the combination of both PSO and GA. The optimized coefficients are selected to guarantee desirable static and dynamic responses in a wide range of operations regardless of the number of inverters, system configuration, output impedance differences, and load types. Through the proposed design and tuning method, the performance of the MG is improved as compared to those obtained using state-of-art techniques. This fact is demonstrated by using numerical simulations performed on a detailed model implemented in PSIM© software.

Authors

Seyedamin Valedsaravi,Abdelali El Aroudi,Jose A Barrado-Rodrigo,Walid Issa,Luis Martínez-Salamero

Journal

Energies

Published Date

2022/5/19

Exact Numerical Method for Predicting Instabilities of Switching Converters with Constant Power Load

Switching converters are nonlinear dynamical systems irrespective of the load and can exhibit different types of instabilities with the variation of the parameters. Due to the on/off nature of the periodically controlled switches, this kind of system is modeled by a set of differential equations (i.e., subsystem) after satisfying different switching conditions within a switching period. Therefore, their steady-state behavior shows periodic waveforms in the time domain and periodic orbit in the state space. For resistive load, the stability analysis of the periodic orbit can be done by calculating the fundamental solution matrix or monodromy matrix using exponential matrices for evolution within the linear subsystems, and the saltation matrices for transition across subsystems through switching conditions. However, with Constant Power Load (CPL), the subsystems are nonlinear and the state matrices are state dependent. Therefore …

Authors

Kuntal Mandal,Abdelali El Aroudi

Published Date

2022/11/22

Flatness based control of single phase grid connected photovoltaic system associated with a shunt active power filter

The present paper proposes a new controller design method based on the flatness approach of single-phase full bridge shunt active power filter (SAPF) connected to photovoltaic system. The main control objective is threefold: (i) extracting the maximum active power in the output photovoltaic panel using an appropriate maximum power point tracking (MPPT) algorithm; (ii) regulation of the voltage of the DC link capacitor with the MPPT requirement to ensure the power exchanged between PV source and AC power grid; (iii) compensation for undesired harmonic and reactive currents caused by the non-linearity of electronic power loads, i.e. power factor correction (PFC). In this paper, the problem is dealt with designing a new two-loop cascaded controller in which the inner loop is constructed using a flatness approach to ensure the unity power factor. The outer loop consists mainly of filtered proportional-integral (PI …

Authors

Z Hekss,A Abouloifa,S Echalih,I Lachkar,A El Aroudi,F Giri

Journal

IFAC-PapersOnLine

Published Date

2022/1/1

Guest Editorial Toward Reliability Enhancement and Smarter Sensing for Emerging Interacting Dynamics in High Renewable Penetrated Power System

This Special Issue of the IEEE Journal on Emerging and Selected Topics in Circuits and Systems (JETCAS) is dedicated to provide a bridge among multidisciplines to enhance the reliability and sensing throughout the fundamental theory and practical design in high renewable penetrated power systems.

Authors

Zhen Li,Abdelali El Aroudi,Xiaozhe Wang,Innocent Kamwa

Journal

IEEE Journal on Emerging and Selected Topics in Circuits and Systems

Published Date

2022/3/17

High-Gain Observer-Based Advanced Nonlinear Control of a Grid-Connected Wind Energy Conversion System with Sensorless Maximum Power Point Tracking

This paper deals with the control development of a wind energy conversion system (WECS) interfaced to a utility grid by using a doubly fed induction generator (DFIG), a back-to-back (B2B) converter and an RL filter for optimal power extraction. The aim was to design a sensorless controller to improve the system reliability and to simultaneously achieve the regulation of the generator speed, reactive power and DC-link voltage. The proposed global control scheme combines: (i) a high-gain observer employed to estimate the generator speed and the mechanical torque, usually regarded as accessible, (ii) a sensorless MPPT block developed to provide optimal generator speed reference, which is designed on the basis of the mechanical observer and a polynomial wind-speed estimator and (iii) a finite-time controller (FTC) applied to the B2B converter to meet the output reference’s tracking objectives in a short predefined finite time by using the backstepping and Lyapunov approaches. The proposed controller performance is formally analysed, and its capabilities are verified by numerical simulations using a 2 MW DFIG wind turbine (WT) under different operating conditions.

Authors

Abdelmajid Abouloifa,Karim Noussi,Elhoussin Elbouchikhi,Hanane Katir,Ibtissam Lachkar,Abdelali El Aroudi

Journal

Machines

Published Date

2022/11/14

Control of a PV-fed cascaded half-bridge multilevel inverter with shunt active power filter capabilities

Due to increasingly use of nonlinear loads in power grids, an Active Power Filter (APF) is unavoidable for guaranteeing the stable and efficient operation of power systems. APFs based on Cascaded Half-Bridge (CHB) inverters with low switching frequency can compensate high-order harmonics in medium and high voltage systems. Since grid-connected Photovoltaic (PV) systems interface to the grid with inverters, they can be multi-functionally used both as APFs and power feeders. In this paper, the control of a grid-connected 5-level CHB inverter acting as a shunt APF is addressed in presence of nonlinear loading conditions. The CHB converter is fed by PV arrays interfacing DC-DC boost converters whose main objective is to track maximum available power from the PV sources. The CHB is controlled to keep the grid current sinusoidal and in phase with the grid voltage hence achieving a unitary power factor as …

Authors

Seyedamin Valedsaravi,Abdelali El Aroudi,Luis Martínez Salamero

Journal

IFAC-PapersOnLine

Published Date

2022/1/1

Singular Perturbation Theory for PWM AC/DC Converters: Cascade Nonlinear Control Design and Stability Analysis.

In this paper, the problem of controlling PWM single-phase AC/DC converters is addressed. The control objectives are twofold:(i) regulating the output voltage to a selected reference value, and (ii) ensuring a unitary power factor by forcing the grid current to be in phase with the grid voltage. To achieve these objectives, the singular perturbation technique is used to prove that the power factor correction can be done in the open-loop system with respect to certain conditions that are not likely to take place in reality. It is also applied to fulfill the control objectives in the closed-loop through a cascade nonlinear controller based on the three-time scale singular perturbation theory. Additionally, this study develops a rigorous and complete formal stability analysis, based on multi-time-scale singular perturbation and averaging theory, to examine the performance of the proposed controller. The theoretical results have been validated by numerical simulation in MATLAB/Simulink/SimPowerSystems environment.

Authors

Y Mchaouar,A Abouloifa,I Lachkar,H Katir,F Giri,A El Aroudi,A Elallali,C Taghzaoui

Journal

Iranian Journal of Electrical & Electronic Engineering

Published Date

2022/3/1

Polynomial sliding surfaces to control a boost converter with constant power load

The unstable ON and OFF state trajectories of a boost converter supplying a constant power load (CPL) are appropriately combined using sliding-mode control (SMC) with a suitable surface to yield a stable trajectory that reaches a specified equilibrium point. Selecting the optimum surface involves a comparative analysis among potential candidates in terms of stability, disturbance rejection, conduction losses and inrush current. The performance as switching function of polynomials of degree zero (non-zero constant), degree one (affine function) and degree 2 (quadratic function) are analyzed in depth to conclude that the affine function leads to the best static and dynamic results. The theoretical predictions are verified by means of simulations and measurements in a prototype.

Authors

David A Zambrano-Prada,Abdelali El Aroudi,Luis Vázquez-Seisdedos,Luis Martínez-Salamero

Journal

IEEE Transactions on Circuits and Systems I: Regular Papers

Published Date

2022/10/20

Global Dynamical Analysis of a Boost Converter with a Constant Power Load and Actively Damped by a Series Loss-Free Resistor

Two-stage cascaded DC–DC converters appear in many power electronics engineering applications. In this cascaded scheme, the first stage is called the source or upstream converter while the second one is called the load or downstream converter. If the downstream converter is controlled to maintain a tightly regulated output voltage on the load, it behaves as a constant power load (CPL) for the source converter. The overall dynamics of this arrangement tends to be unstable, so it can be stabilized by means of a suitable feedback, or instead in open loop operation, by using an additional resistor, which can be a loss free resistor (LFR), thus avoiding efficiency losses. This work deals with the dynamical analysis of an open-loop DC—DC boost converter with a stabilizing resistor in series with the inductor and a constant power load by means of an averaged model. Fold and Hopf bifurcations explain the existence …

Authors

Luis Benadero,Abdelali El Aroudi,Max Sebastiá-Rullo,Hugo Valderrama-Blavi,Angel Cid-Pastor,Luis Martínez-Salamero

Published Date

2022/11/22

Modeling and design of voltage-mode controlled PV-fed SEPIC converter

In this paper, we study a system that is based on photovoltaic energy source connected to a SEPIC converter with an MPPT algorithm. The PV-fed SEPIC converter is linked at its output to a DC current sink. The design of the converter is presented and a steady-state analysis is addressed. A small-signal modeling is also developed for an eventual controller design. The mathematical model is validated using numerical simulations. Hence, the PV-fed SEPIC converter controller is designed and its overall performance is analyzed.

Authors

Y Rais,A El Aroudi,A Zakriti,A Khamlichi

Journal

IFAC-PapersOnLine

Published Date

2022/1/1

A cascaded controller for a grid-tied photovoltaic system with three-phase half-bridge interleaved buck shunt active power filter: hybrid control strategy and fuzzy logic approach

This paper focuses on the control development of a grid-tied photovoltaic system coupled with a shunt active power filter. The considered power system includes a PV panel, a single-capacitor three half-bridge interleaved buck converter connected to a three-phase power grid and a nonlinear load. This study aims to accomplish simultaneously three objectives: i) to ensure a high compensation level of current harmonics and reactive power consumed by the nonlinear load in order to perform power factor correction at the grid side; ii) to extract the maximum power from the PV panel regardless the climatic conditions; iii) to regulate the dc bus capacitor voltage to its reference provided by the MPPT controller. To this end, a controller using a two-loop cascade strategy is designed. First, the inner loop is developed with the hybrid automaton approach to formulate the switching control signals with the aim of guaranteeing …

Authors

Salwa Echalih,Abdelmajid Abouloifa,Ibtissam Lachkar,Abdelali El Aroudi,Zineb Hekss,Fouad Giri,Mohammed S Al-Numay

Journal

IEEE Journal on Emerging and Selected Topics in Circuits and Systems

Published Date

2022/2/17

Review of solid-state transformer applications on electric vehicle DC ultra-fast charging station

The emergence of DC fast chargers for electric vehicle batteries (EVBs) has prompted the design of ad-hoc microgrids (MGs), in which the use of a solid-state transformer (SST) instead of a low-frequency service transformer can increase the efficiency and reduce the volume and weight of the MG electrical architecture. Mimicking a conventional gasoline station in terms of service duration and service simultaneity to several customers has led to the notion of ultra-fast chargers, in which the charging time is less than 10 min and the MG power is higher than 350 kW. This survey reviews the state-of-the-art of DC ultra-fast charging stations, SST transformers, and DC ultra-fast charging stations based on SST. Ultra-fast charging definition and its requirements are analyzed, and SST characteristics and applications together with the configuration of power electronic converters in SST-based ultra-fast charging stations are described. A new classification of topologies for DC SST-based ultra-fast charging stations is proposed considering input power, delta/wye connections, number of output ports, and power electronic converters. More than 250 published papers from the recent literature have been reviewed to identify the common understandings, practical implementation challenges, and research opportunities in the application of DC ultra-fast charging in EVs. In particular, the works published over the last three years about SST-based DC ultra-fast charging have been reviewed.

Authors

Seyedamin Valedsaravi,Abdelali El Aroudi,Luis Martínez-Salamero

Published Date

2022/8/2

Small-Signal Dynamics of Interconnected Subsystems in Electric Vehicle

A general electric vehicle (EV) consists of many subsystems such as battery, DC-DC converter, DC-AC inverter, motor, and vehicle body along with their controllers. Therefore, the modeling, simulation, and validation are time-consuming and critical tasks due to its multiple time scale nature of the different subsystems and multi-domain modeling of different subsystems, i.e., battery model using physics, converter as well as inverter model using electrical, and motor-vehicle body model using mechanical engineering concept. Moreover, the selection of the type of modeling has a direct impact on control decisions of high-performance vehicle designs and their analysis. In this paper, small-signal transfer function analysis has been used to capture the overall dynamics of the EV along with controller design and stability analysis. To do this, a constant battery voltage DC-DC converter with equivalent inverter-fed motor …

Authors

Kuntal Mandal,Abdelali El Aroudi

Published Date

2022/11/22

Replacing all ECs with NECs in step-up converters—a systematic approach

Proposed in this letter is a novel generalized method to replace all short-life and large-size electrolytic capacitors (ECs) with non-ECs (NECs) in step-up converters. NEC has a longer lifespan and smaller size, leading to extended converter life and reduced converter size. The proposed approach can systematically replace ECs with NECs without affecting the desired converters’ output features. After theory elaboration, five representative converters in two schemes are built with ten / high power density prototypes for experimental verification. Experiments show that these prototypes can reach maximum power density of , significantly higher than converters with ECs, and maximum efficiency of 95.64%.

Authors

Guidong Zhang,Weichen Chen,S Yu Samson,Abdelali El Aroudi,Yun Zhang

Journal

IEEE Transactions on Power Electronics

Published Date

2021/7/9

Analytical determination of fast-scale instability boundaries for current mode controlled DC–DC converters with CPL and closed voltage loop

In this paper fast-scale instability boundary in power converters loaded by a constant power load is addressed using an analytical approach. From a piecewise linearized model of the converter, the discrete-time steady-state values of the electrical variables are first determined. Based on justified and realistic approximations of the voltage and current ripples, simple and accurate expressions for these steady-state values are derived and validated. Starting from a matrix-based analytical expression representing the fast-scale instability boundary, a simple design-oriented approximate expression is derived showing insight into how the different system parameters influence this boundary. We highlight its dependency on ripple and slope quantities of the electrical variables of the converter and we explore the impact of variation of parameters in different projections of the multi-dimensional parameter space. An important …

Authors

Abdelali El Aroudi,Mohammed S Al-Numay,Reham Haroun,Guidong Zhang

Journal

IEEE Journal on Emerging and Selected Topics in Circuits and Systems

Published Date

2021/1/19

Fault tolerant backstepping control for double-stage grid-connected photovoltaic systems using cascaded H-bridge multilevel inverters

This letter introduces a complete DC-AC conversion system fed by photovoltaic (PV) energy. The system consists of N PV panels, N DC-DC boost converters, N cascaded H-bridge inverters, a DC-link composed of N capacitors and an LCL filter. This work aims at reaching threefold control objectives: i) Extracting the available maximum power by regulating the voltages across the PV panels, ii) Ensuring a unitary power factor, iii) Regulating the DC-link voltage to a desired reference. To achieve the mentioned objectives, a multi-loop regulator is designed. The PV panels are individually controlled to track the maximum power point in order to efficiently operate at either the same or different varying climatic conditions without failures. In addition to the maximum power point tracking (MPPT) controller, two cascaded loops guaranteeing a satisfactory power factor and DC-link voltage regulation are developed. The …

Authors

Hanane Katir,Abdelmajid Abouloifa,Karim Noussi,Ibtissam Lachkar,Abdelali El Aroudi,Meriem Aourir,Fadwa El Otmani,Fouad Giri

Journal

IEEE Control systems letters

Published Date

2021/7/6

Hourglass‐shaped impedance network based nonelectrolytic capacitors high step‐up converter with low voltage stress

In this study, a novel high‐step‐up converter is proposed with a new hourglass‐shaped impedance network (HIN). Due to the short lifetime of electrolytic capacitors (ECs), the proposed converter uses nonelectrolytic capacitors (NECs), which however can realize all ECs' features. Besides, the proposed converter has low capacitor voltage stresses, ensuring it could be electrolytic‐capacitors‐free. With this feature, the proposed high step‐up converter has smaller size, lighter weight, smaller parasitic resistance, and longer operation life than the conventional ones with ECs. In this paper, detailed operational principle and performance of the proposed converter are presented, to demonstrate its advanced features. Simulation and experimental studies are also carried out, which validate the feasibility and effectiveness of the proposed converter.

Authors

Guidong Zhang,Weichen Chen,Samson S Yu,Abdelali El Aroudi

Journal

International Journal of Circuit Theory and Applications

Published Date

2021/4

Advanced nonlinear controller of single‐phase shunt active power filter interfacing solar photovoltaic source and electrical power grid

This paper addresses the nonlinear controller design and the stability analysis of a shunt active power filter (SAPF) interfacing a solar photovoltaic (PV) system that consists of a couple of PV panels, a single‐phase two‐stage IGBT half‐bridge SAPF and two identical DC link capacitors. We seek for the considered system the fulfillment of three control objectives: (a) extracting the maximum PV power using an appropriate maximum power point tracking (MPPT) algorithm; (b) regulation of the DC link capacitor voltages to the reference provided by the MPPT controller hence ensuring the exchange of power between the PV source and the AC power grid; (c) compensation for reactive power and undesired harmonics caused by the nonlinearity of electronic power loads, that is, performing power factor correction (PFC). The control objectives are achieved using a new two‐loop cascaded controller. The Backstepping …

Authors

Zineb Hekss,Abdelmajid Abouloifa,Ibtissam Lachkar,Abdelali El Aroudi,Salwa Echalih,Mohammed Al‐Numay,Fouad Giri

Journal

International Transactions on Electrical Energy Systems

Published Date

2021/12

Fast-scale instability and stabilization by adaptive slope compensation of a PV-Fed differential boost inverter

Numerical simulations reveal that a single-stage differential boost AC module supplied from a PV module under an Maximum Power Point Tracking (MPPT) control at the input DC port and with current synchronization at the AC grid port might exhibit bifurcation phenomena under some weather conditions leading to subharmonic oscillation at the fast-switching scale. This paper will use discrete-time approach to characterize such behavior and to identify the onset of fast-scale instability. Slope compensation is used in the inner current loop to improve the stability of the system. The compensation slope values needed to guarantee stability for the full range of operating duty cycle and leading to an optimal deadbeat response are determined. The validity of the followed procedures is finally validated by a numerical simulations performed on a detailed circuit-level switched model of the AC module.

Authors

Abdelali El Aroudi,Mohamed Debbat,Mohammed Al-Numay,Abdelmajid Abouloiafa

Journal

Applied Sciences

Published Date

2021/2/27

Map optimization fuzzy logic framework in wind turbine site selection with application to the usa wind farms

In this study, we analyze observational and predicted wind energy datasets of the lower 48 states of the United States, and we intend to predict an optimal map for new turbines placement. Several approaches have been implemented to investigate the correlation between current wind power stations, power capacity, wind seasonality, and site selection. The correlation between stations is carried out according to Pearson correlation coefficient approach joined with the spherical law of cosines to calculate the distances. The high correlation values between the stations spaced within a distance of 100 km show that installing more turbines close to the current farms would assist the electrical grid. The total power capacity indicates that the current wind turbines are utilizing approximately 70% of the wind resources available in the turbine’s sites. The Power spectrum of Fourier’s spectral density indicates main, secondary, and harmonic frequencies correspond to yearly, semiyearly, and daily wind-speed periodic patterns. We propose and validate a numerical approach based on a novel fuzzy logic framework for wind turbines placement. Map optimizations are fitted considering different parameters presented in wind speed, land use, price, and elevation. Map optimization results show that suitable sites for turbines placement are in general agreement with the direction of the correlation approach.

Authors

Gorg Abdelmassih,Mohammed Al-Numay,Abdelali El Aroudi

Journal

Energies

Published Date

2021/9/26

Nonlinear dynamics and stability analysis of a three-cell flying capacitor dc-dc converter

This paper presents a study of the nonlinear dynamic behavior a flying capacitor four-level three-cell DC-DC buck converter. Its stability analysis is performed and its stability boundaries is determined in the multi-dimensional paramertic space. First, the switched model of the converter is presented. Then, a discrete-time controller for the converter is proposed. The controller is is responsible for both balancing the flying capacitor voltages from one hand and for output current regulation. Simulation results from the switched model of the converter under the proposed controller are presented. The results show that the system may undergo bifurcation phenomena and period doubling route to chaos when some system parameters are varied. One-dimensional bifurcation diagrams are computed and used to explore the possible dynamical behavior of the system. By using Floquet theory and Filippov method to derive the monodromy matrix, the bifurcation behavior observed in the converter is accurately predicted. Based on justified and realistic approximations of the system state variables waveforms, simple and accurate expressions for these steady-state values and the monodromy matrix are derived and validated. The simple expression of the steady-state operation and the monodromy matrix allow to analytically predict the onset of instability in the system and the stability region in the parametric space is determined. Numerical simulations from the exact switched model validate the theoretical predictions.

Authors

Abdelali El Aroudi,Natalia Cañas-Estrada,Mohamed Debbat,Mohamed Al-Numay

Journal

Applied Sciences

Published Date

2021/2/4

Performance evaluation for an hourglass‐shaped impedance‐network‐based high step‐up converter in a photovoltaic system using PSIM© simulation

In this paper, the control design and the performance evaluation of a novel high step‐up converter with an hourglass‐shaped impedance network (HIN) are performed when used as an interface between a photovoltaic (PV) source and a load in a PV system. For optimum energy extraction from the PV source, the PV voltage controller design and optimization to track the maximum power point of the PV system is addressed. The converter offers the possibility of an optimum regulation of the PV voltage with voltage mode control using a simple Type‐III compensation network resulting in a low overshoot, a relatively short settling time, and negligible energy loss after a change of input reference due to the maximum power point tracking (MPPT) or to irradiance change. To evaluate the performance of the HIN converter when used in a PV system, PSIM©software is used to perform numerical simulations using the switched …

Authors

Abdelali El Aroudi,Guidong Zhang,Mohammed Al‐Numay

Journal

International Journal of Circuit Theory and Applications

Published Date

2021/9

Modelling and control of modular DC-nanogrids based on loss-free resistors

This paper proposes a modular photovoltaic (PV) dc-Nanogrid (dc-NG) architecture for residential applications. The proposed architecture is based on the Loss-Free Resistor (LFR) concept. The dc distribution bus is supplied by PV panels, ac utility and a storage battery. The storage battery is connected to the main dc bus through a dc-dc bidirectional converter (BDC). This battery has also an important role to ensure uninterruptible power supply to the critical loads and controls the power flow in the dc-NG. A mathematical model of the system is first derived and a stability analysis is carried out showing that the stability is guaranteed under certain mild conditions. Numerical simulations of a case study for two PV panels corroborate the theoretical predictions which have been finally confirmed by experimental measurements.

Authors

Reham Haroun,Abdelali El Aroudi,Angel Cid-Pastor,Enric Vidal-Idiarte,Hugo Valderrama-Blavi,Luis Martinez-Salamero

Journal

IEEE Access

Published Date

2020/2/14

Analysis, design, and simulation of a dual active bridge for PV-based residential nanogrids

In this paper, theoretical modeling, design and numerical simulations are presented for a dc-dc dual active bridge (DAB) converter in a Phtovoltaic (PV)-based nanogrid. Different tasks in the nanogrid are performed using the same topology. A case study of a nanogird with three PV modules connected to a regulated dc bus using three DAB converters will be considered. For these DAB converters, the input voltage is controlled based on natural sampling fixed frequency pulse width modulation. The dc bus is regulated by using a grid-connected dc-ac inverter injecting the harvested PV power to the grid while performing active power quality control. The dc bus is also connected to a storage battery through a bidirectional DAB converter operating as a battery charger/discharger. The Numerical simulation results show the validity of the mathematical model and the capability of the DAB converter to perform all the …

Authors

Reham Haroun,Abdelali El Aroudi

Published Date

2020/6/29

Fast voltage-based mppt control for high gain switched inductor dc-dc boost converters

Switched inductor (SL) step-up dc-dc converters can be used for high voltage gain applications such as in PV systems. In this paper, a study of a N-cell high voltage gain boost dc-dc converter performing maximum power point tracking from a PV source is presented. First, the time domain dynamic model is derived. Then, the linearized s— domain model is first obtained. It is obtained that contrarily to the conventional canonical boost converter, the N–cell switched inductor converter presents a stable zero in the duty-cycle-to-PV-voltage transfer function which can be considered as an advantage to design a fast voltage-based MPPT control having the same response speed that corresponds to current mode control. Using the resulting control-to-output transfer function, a fast voltage-based MPPT controller is designed. Finally, numerical simulation are used to evaluate the performances of the converter when used in PV …

Authors

Abdelali El Aroudi,Reham Haroun,Guidong Zhang,Peiwei Zheng,Mohamed Al-Numay,Herbert Ho-Ching Iu

Published Date

2020/10/12

Bifurcation analysis in a self-oscillatingseries resonant converter

In this paper, the dynamics of a dc-ac resonant self-oscillating LC series inverter is analyzed from the point of view of piecewise smooth dynamical systems. The system under study is defined by two symmetric configurations and its bifurcation analysis is performed in a one dimensional parameter space. This analysis reveals that a non smooth transition takes place between two strongly different dynamical behaviors. The first one is an oscillating regime, which is the one used in applications and it involves a repetitive switching sequence between the system configurations. This behavior is exhibited whenever the open loop equilibrium corresponding to the system configurations are foci. The second one is a non desired stationary regime corresponding to the equilibrium points of node type whose stable manifolds preclude the appearance of oscillations.

Authors

Enrique Ponce,L Benadero,Abdelali El Aroudi

Journal

Power Systems & Smart Energies

Published Date

2020/2/10

Improvement of Extracted Power of Pole Mounted Solar Panels by Effective Cooling Using Aluminum Heat Sink under Hot Weather and Variable Wind Speed Conditions

The increase in operating temperature of PV generators leads to degradation of their performance. These adverse effects of high temperatures are considered as one of the most important problems that solar panel operation faces in hot weather areas. A lot of research has been undertaken to study this aspect and find ways of limiting the harm caused by such high temperatures. To overcome this harm and to maintain the operating temperature of the PV cells within the optimum range specified by manufacturers, cooling the solar panels often becomes indispensable. This paper discusses the heat transfer through the solar panel layers and studies the effect of high temperature on the solar panel performance in a hot desert environment. It also presents the development of a new solar panel structure viz. by installing an aluminum heat sink to reduce the effect of temperature rise and thus improve the solar panel performance. The study focuses on a pole-mounted solar panel for a street lighting apparatus in extremely hot desert conditions with fluctuating wind speeds. It will be shown that adding an aluminum heat sink to the solar panel bottom mitigates the effect of increased temperature and hence modifies the solar panel operating point by increasing both the efficiency and the lifetime. The solar cell temperature is decreased by 16.4% as a result of the aluminum heat sink installation on the solar panel back sheet and consequently, the accumulated energy produced by the the solar panel is increased by 13.23% per day.

Authors

Youssef Hassan,Mohamed Orabi,Abdulaziz Alshreef,Omar M. Al-Rabghi,Badr A Habeebullah,Abdelali El Aroudi,Mohamed A. Ismeil

Journal

Energies

Published Date

2020/6/18

Analysis of subharmonic oscillation and slope compensation for a differential boost inverter

This paper focuses on the steady-behavior of a differential boost inverter used for generating a sinewave AC voltage in rural areas. The analysis of its dynamics will be performed using an accurate approach based on discrete time models and Floquet theory and adopting a quasi-static approximation. In particular, the undesired subharmonic oscillation exhibited by the inverter will be analyzed and its boundary in the parameter space will be predicted and delimited. Combining analytical expressions and computational procedures to determine the quasi-static duty cycle, subharmonic oscillation is accurately predicted. It is found that subharmonic oscillation takes place at critical values of the sinewave voltage reference cycle, which can cause distortion to the input current and degrade the harmonic content of the output voltage. The results provide useful information for the design of the boost inverter to avoid distortion caused by subharmonic oscillation. Namely, the minimum value of the compensation slope and the maximum proportional gain of the AC output voltage controller guaranteeing a pure sinewave voltage and clean inductor current during the entire AC cycle will be determined. Numerical simulations performed on the switched model implemented using PSIM© software confirm the theoretical predictions.

Authors

Abdelali El Aroudi,Mohamed Al-Numay,Reham Haroun,Meng Huang

Journal

Applied Sciences

Published Date

2020/8/13

Non-visible transformations of chaotic attractors due to their ultra-low density in AC–DC power factor correction converters

Recently, it has been shown that DC–AC and AC–DC power converters whose dynamics is governed by two vastly different frequencies lead to a special class of piecewise smooth models characterized by a practically unpredictable number of switching manifolds between partitions in the state space associated with different dynamics. In the previous publications, we have shown that transformations of chaotic attractors in such models can be caused by their interactions with unstable cycles occurring in the regions of the attractors associated with an ultra-low invariant density, which is beyond a practical observability in physical or numerical experiments. The appearance of such low-density regions has been explained by the so-called spiking phenomenon. In the present paper, we make the next step and ask the natural question what are the reasons behind the appearance of spikes. Applying a novel …

Authors

Viktor Avrutin,Zhanybai T Zhusubaliyev,Abdelali El Aroudi

Journal

Nonlinear Dynamics

Published Date

2020/12

Non-observable chaos in piecewise smooth systems

In the present paper, we discuss bifurcations of chaotic attractors in piecewise smooth one-dimensional maps with a high number of switching manifolds. As an example, we consider models of DC/AC power electronic converters (inverters). We demonstrate that chaotic attractors in the considered class of models may contain parts of a very low density, which are unlikely to be observed, neither in physical experiments nor in numerical simulations. We explain how the usual bifurcations of chaotic attractors (merging, expansion and final bifurcations) in piecewise smooth maps with a high number of switching manifolds occur in a specific way, involving low-density parts of attractors, and how this leads to an unusual shape of the bifurcation diagrams.

Authors

Viktor Avrutin,Zhanybai T Zhusubaliyev,Dan Suissa,Abdelali El Aroudi

Journal

Nonlinear Dynamics

Published Date

2020/2

Classification of three-phase grid-tied microinverters in photovoltaic applications

Microinverters are an essential part of the photovoltaic (PV) industry with significant exponential prevalence in new PV module architectures. However, electrolyte capacitors used to decouple double line frequency make the single-phase microinverters topologies the slightest unit in this promising industry. Three-phase microinverter topologies are the new trend in this industry because they do not have double-line frequency problems and they do not need the use of electrolyte capacitors. Moreover, these topologies can provide additional features such as four-wire operation. This paper presents a detailed discussion of the strong points of three-phase microinverters compared to single-phase counterparts. The developed topologies of three-phase microinverters are presented and evaluated based on a new classification based on the simplest topologies among dozens of existing inverters. Moreover, the paper considers the required standardized features of PV, grid, and the microinverter topology. These features have been classified as mandatory and essential. Examples of the considered features for classifications are Distributed Maximum Power Point Tracking (DMPPT), voltage boosting gain, and four-wire operation. The developed classification is used to identify the merits and demerits of the classified inverter topologies. Finally, a recommendation is given based on the classified features, chosen inverter topologies, and associated features.

Authors

Ahmed Shawky,Mahrous Ahmed,Mohamed Orabi,Abdelali El Aroudi

Journal

Energies

Published Date

2020/6/7

Multiple-loop control design for a single-stage PV-fed grid-tied differential boost inverter

This paper focuses on the control design of a differential boost inverter when used in single-stage grid-tied PV systems. The inverter performs both Maximum Power Point Tracking (MPPT) at the DC side and Power Factor Correction at the AC side. At first, the state-space time-domain averaged model of the inverter is derived and the small signal frequency domain model is obtained using a quasi-static approximation in which the inverter is treated as a DC–DC converter with a slowly varying output voltage. Then, the controllers are designed using a three-loop strategy in which the inverter inductor currents loop is used for suitable compensation, the DC Photovoltaic (PV) voltage loop is used for MPPT and the output grid current loop is used for Power Factor Correction (PFC) and active power control. The selection of the control parameters is based on a compromise among suitable system performances such as settling time of the input PV voltage, the sampling period of the MPPT, total harmonic distortion of the output grid current, power factor as well as suppression of subharmonic oscillation for all the range of the operating duty cycle. The resulting design ensures that the oscillations of the voltage, current and power at the DC side and the grid current at the AC side are effectively controlled. The validity of the proposed control design is verified by numerical simulations performed on the switched model of the system demonstrating its robustness and fast response under irradiance variations and MPPT perturbations despite the nonlinearity and complexity of the system.

Authors

Abdelali El Aroudi,Reham Haroun,Mohamed Al-Numay,Meng Huang

Journal

applied sciences

Published Date

2020/7/13

Synthesis of constant power loads using switching converters under sliding-mode control

This paper presents a systematic approach to synthetize constant power loads using switching converters under sliding-mode control. The generation of sliding motions is analyzed in converters with a series inductor in the input port and a switching function representing the error between the input power and a suitable power reference. The analysis establishes the existence conditions for sliding-mode and the stability of the resulting ideal dynamics. Simulation and experimental results verifying the theoretical predictions in boost, Ćuk and SEPIC converters illustrate the proposal. The design procedure yields a simple, economical and small-size prototype that can be useful in the experimental validation of converters supplying constant power loads.

Authors

Blanca Areli Martinez-Trevino,Abdelali El Aroudi,Angel Cid-Pastor,Germain Garcia,Luis Martinez-Salamero

Journal

IEEE Transactions on Circuits and Systems I: Regular Papers

Published Date

2020/10/22

Transient voltage and current stresses estimation of MMC-MTDC system via discrete-time analysis

Transient voltage and current stresses are essential for the design and protection of multi-terminal DC (MTDC) transmission systems, especially under the short-term dynamics after severe grid faults. In this paper, we propose a discrete-time model for the modular multilevel converter based MTDC (MMC-MTDC) system considering the DC-side disturbances in the system. Based on the piecewise linear modeling, the state variables such as the transient voltage on the sub-module (SM), arm current, etc., can be calculated analytically for the critical short term (within 10 ms) after the severe DC fault while the system protection is yet to be activated. Parameter sensitivity analysis is also performed to give a better system design guideline. The estimation results are validated by detailed electromagnetic (EMT) circuit simulations and the scaled-down experimental laboratory prototype.

Authors

Yongyang Chen,Meng Huang,Shangzhi Pan,Abdelali El Aroudi,Xiaoming Zha

Journal

IEEE Transactions on Power Delivery

Published Date

2020/1/22

Piecewise quadratic slope compensation technique for DC-DC switching converters

In this paper, a piecewise quadratic slope compensation technique for eliminating subharmonic oscillations in dc-dc switching converters is studied. With this technique, a self-generated signal is used in the compensation scheme resulting in a naturally full duty cycle stability domain. The expression of the piecewise quadratic compensating signal within a switching cycle is derived. It is obtained that the steady-state value of the amplitude of this signal is the same as in the conventional linear slope compensation scheme that guarantees stability for all values of the duty cycle. However, in the piecewise quadratic scheme this is achieved without exact knowledge of the inductance value nor sensing the input and the output voltages. The stability of the converter under the considered compensation scheme is also guaranteed for all values of the duty cycle with voltage loop open. A boost converter under peak current …

Authors

Abdelali El Aroudi,Kuntal Mandal,Mohammed S Al-Numay,Damian Giaouris,Soumitro Banerjee

Journal

IEEE Transactions on Circuits and Systems I: Regular Papers

Published Date

2020/5/27

PWM nonlinear control with load power estimation for output voltage regulation of a boost converter with constant power load

This article presents a nonlinear control based on pulsewidth modulation (PWM) and an estimation mechanism of the output power to regulate the output voltage of a boost converter supplying a constant power load (CPL). The controller uses three parameters K p , K E , and K A lending the regulator an adaptive nature. The behavior of the latter can be expressed in terms of the dynamic description of three errors. Namely, first, current error, i.e., difference between the average value of the inductor current and its equilibrium value, second, output voltage error, i.e., deviation between the output voltage and its desired equilibrium value, and, second, power error, i.e., difference between the output power estimated value and its actual value. The analysis of the dynamic behavior of the three errors results in a parametric region in the plane K p - K E in which the system stability is guaranteed. The regulator exhibits fast …

Authors

Blanca Areli Martinez-Trevino,Abdelali El Aroudi,Hugo Valderrama-Blavi,Angel Cid-Pastor,Enric Vidal-Idiarte,Luis Martinez-Salamero

Journal

IEEE Transactions on Power Electronics

Published Date

2020/7/8

Period doubling route to chaos in open loop boost converters under constant power loading and discontinuous conduction mode conditions

An implicit first-order non-dimensional model of open loop dc-dc boost converter operating in Discontinuous Conduction Mode (DCM) with Constant Power Load (CPL) is derived. Analysis of this model shows that successive period doubling bifurcations and subharmonic oscillation take place when certain parameters such as the switching period, the operating duty cycle and the load power are varied. The resulting typical period-doubling route to chaos is confirmed by numerical simulations under the mentioned operating conditions.

Authors

Luis Benadero,Abdelali El Aroudi,Luis Martínez-Salamero,Chi Kong Tse

Published Date

2020/10/12

On the coexistence of multiple limit cycles in H-bridge wireless power transfer systems with zero current switching control

This paper deals with the analysis of limit cycle oscillations in H-bridge wireless power transfer resonant inverters under primary-side Zero Current Switching (ZCS) control. The limit cycles are computed by solving their initial value problem. If this problem is not dealt with properly, erroneous results may be derived and ghost or physically inadmissible limit cycles may be obtained. A complementary condition must be added to obtain only real limit cycles that can take place in the system. The stability analysis of these real cycles is performed using Floquet theory. For the case of the series-series compensated topology, the resulting monodromy matrix reveals that these cycles are stable whenever they exist and the load resistance is larger than a critical value. On the contrary, for load resistance smaller than this critical value, coexistence of different real stable limit cycles is also possible. While one of the limit cycles …

Authors

Abdelali El Aroudi,Jianbin Huang,Mohammed S Al-Numay,Zhen Li

Journal

IEEE Transactions on Circuits and Systems I: Regular Papers

Published Date

2020/1/1

Single‐loop control scheme for electrolytic capacitor‐less AC–DC rectifiers with PFC in continuous conduction mode

A new simplified control scheme is proposed for AC–DC electrolytic capacitor‐less converters operating in continuous conduction mode (CCM). The proposed method has a single‐loop controller responsible for both regulation and power factor correction (PFC). In comparison with the two‐loop conventional CCM current mode controller, the proposed scheme does not need a multiplier or extra sensors hence simplifying the control circuitry and its design procedures. Modelling of the closed‐loop converter is addressed and experimental results are provided to show the feasibility of the control scheme.

Authors

M Nassary,M Orabi,A El Aroudi

Journal

Electronics Letters

Published Date

2020/5

Auto-tuned quadratic slope compensation for current mode controlled DC-DC converters

In this paper, the steady-state performances of a piecewise quadratic auto-tuned slope compensation technique proposed recently to eliminate subharmonic oscillations in dc-dc switching converters are evaluated. With this technique, a self-generated compensating signal is used resulting in a naturally full duty cycle stability domain by appropriately self-adapting the amplitude of the generated signal both in transient and in steady-state regimes. The circuit corresponding to the proposed technique can be implemented using standard analog devices. A boost converter under current mode control is used to validate the theoretical results both by numerical simulations and by experiments showing that the technique efficiently eliminate subharmonic oscillation and is robust against parameter variations such as load current and inductor value.

Authors

Abdelali El Aroudi,Reham Haroun,Kuntal Mandal,Mohamed Al-Numay

Published Date

2020/10/12

Synthesis, Analysis, and Design of a DC-Nanogrid Using Cascaded Converters for Home Applications

The Photovoltaic (PV) plants combined with energy storage systems are one of the promising solutions of full utilization of renewable energies. These main elements can be used to implement a dc nanogrid (dc-NG) which is a power distribution system for a single house/small building, with the ability to connect or disconnect from other power grids. Moreover, the switching dc-dc converters are widely used to interface the dc output of renewable energy resources with power distribution systems in order to facilitate the use of energy at the customer side in a nanogrid. In the case of residential PV applications, the high conversion ratio is usually required, in order to adapt the low output voltages of PV modules to a dc bus voltage, while dealing with the appropriate impedance matching. In this paper, cascaded step-up converters for residential applications are used to step up the PV panel voltage to the dc bus voltage of …

Authors

R Haroun,A El Aroudi,A Cid-Pastor,H Valderrama-Blavi,E Vidal-Idiarte,L Martinez-Salamero

Published Date

2020/6/29

Dynamic analysis of self-oscillating H-bridge inverters with state feedback

This paper presents a comprehensive approach to analyze the dynamics of a generalized model of resonant inverters using nonsmooth dynamical system theory. The model simultaneously covers both parallel and series resonant inverters under state feedback control. The multi-parametric physical space is reduced to a plane, which is divided in several regions with different dynamical behavior. The boundaries separating these regions are located by solving their corresponding equations and it is found that they all emerge from a singular point in the parameter plane. Suitability for applications of these regions is emphasized, thus providing useful criteria for parameter selection.

Authors

Luis Benadero,Francisco Torres,Enrique Ponce,Abdelali El Aroudi

Journal

Journal of the Franklin Institute

Published Date

2020/1/1

See List of Professors in Abdelali El Aroudi University(Universidad Rovira i Virgili)

Abdelali El Aroudi FAQs

What is Abdelali El Aroudi's h-index at Universidad Rovira i Virgili?

The h-index of Abdelali El Aroudi has been 23 since 2020 and 38 in total.

What are Abdelali El Aroudi's top articles?

The articles with the titles of

Hierarchical Control of Power Distribution in the Hybrid Energy Storage System of an Ultrafast Charging Station for Electric Vehicles

Adaptive Sliding Mode Control for a Boost Converter with Constant Power Load

Passive Damping Stabilization for Constant-Power Loaded Boost Converter

Modeling and design of a photovoltaic‐fed single‐ended primary‐inductor converter for maximum power point tracking with current mode control

Bifurcation Phenomena in Open-Loop DCM-Operated DC–DC Switching Converters Feeding Constant Power Loads

Limit‐cycle‐oscillation in DC bus system and its death through heterogeneous coupling

Design of Loss-Free Resistors Terminated at a Generic Nonlinear Static Load

Period adding with symmetry breaking/recovering in a power inverter with hysteresis control

...

are the top articles of Abdelali El Aroudi at Universidad Rovira i Virgili.

What are Abdelali El Aroudi's research interests?

The research interests of Abdelali El Aroudi are: Power Electronics, Renewable Energy Systems, PV Applications, Nonlinear dynamics, Automatic Control

What is Abdelali El Aroudi's total number of citations?

Abdelali El Aroudi has 5,308 citations in total.

What are the co-authors of Abdelali El Aroudi?

The co-authors of Abdelali El Aroudi are Eduard Alarcon, Martinez-Salamero L*, Soumitro Banerjee, Giral R*, Mohamed Orabi, Javier Calvente.

    Co-Authors

    H-index: 49
    Eduard Alarcon

    Eduard Alarcon

    Universidad Politécnica de Cataluña

    H-index: 48
    Martinez-Salamero L*

    Martinez-Salamero L*

    Universidad Rovira i Virgili

    H-index: 47
    Soumitro Banerjee

    Soumitro Banerjee

    Indian Institute of Science Education and Research, Kolkata

    H-index: 37
    Giral R*

    Giral R*

    Universidad Rovira i Virgili

    H-index: 35
    Mohamed Orabi

    Mohamed Orabi

    Aswan University

    H-index: 33
    Javier Calvente

    Javier Calvente

    Universidad Rovira i Virgili

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