Gevork B. Gharehpetian

About Gevork B. Gharehpetian

Gevork B. Gharehpetian, With an exceptional h-index of 76 and a recent h-index of 60 (since 2020), a distinguished researcher at Amirkabir University of Technology, specializes in the field of Smart Grid, DGs, Monitoring of Power Transformers, FACTS Devices, HVDC Systems and Power System Transients.

His recent articles reflect a diverse array of research interests and contributions to the field:

Multiple Control Strategies for Distributed Battery Energy Storages in Microgrid DC Fast Charging Stations to Improve Load Voltage Variations, Mutual Power Exchange with the …

Aggregator Index for 24-hour Energy Flexibility Evaluation in an ADN including PHEVs

On the control of microgrids against cyber-attacks: A review of methods and applications

Development of a bidirectional HVDC circuit breaker combining a thyristor full-bridge circuit and coupled inductor

The effect of phase change material application in double skin Façade on energy saving of residential buildings considering different climates: a case study

A Novel Model for Battery Optimal Sizing in Microgrid Planning Considering Battery Capacity Degradation Process and Thermal Impact

Multifunctional Control Algorithm for VSC-Based Grid-Connected Microgrid for Compensation Operation Modes

Active distribution network expansion planning considering microgrids for supplying critical loads

Gevork B. Gharehpetian Information

University

Amirkabir University of Technology

Position

Professor of Electrical Engineering Iran

Citations(all)

23850

Citations(since 2020)

14863

Cited By

14909

hIndex(all)

76

hIndex(since 2020)

60

i10Index(all)

465

i10Index(since 2020)

334

Email

University Profile Page

Amirkabir University of Technology

Gevork B. Gharehpetian Skills & Research Interests

Smart Grid

DGs

Monitoring of Power Transformers

FACTS Devices

HVDC Systems and Power System Transients

Top articles of Gevork B. Gharehpetian

Multiple Control Strategies for Distributed Battery Energy Storages in Microgrid DC Fast Charging Stations to Improve Load Voltage Variations, Mutual Power Exchange with the …

Authors

Hossien Faraji,GB Gharehpetian,Amir Khorsandi,Seyed Hossein Hosseinian,Mahdi Mehrtash

Journal

IEEE Transactions on Transportation Electrification

Published Date

2024/3/20

On highways and at the end of distribution feeders, DC fast charging stations (DCFCs) are commonly located. As a result, charging electric vehicles (EVs) at these stations results in a reduction in power quality, including a drop in network voltage. This paper proposes an integrated control system for DCFCs utilizing microgrid (MG) capabilities. The voltage drop problem is addressed using two simultaneous methods in the proposed control systems, including reactive power injection by the MG and reducing the network’s active power consumption by installing distributed battery energy storage (DBES) devices. Furthermore, the control system aims to enhance the performance of the combined MG-DCFC system when operated off-grid. A nonlinear time domain simulation of the proposed control systems is carried out in MATLAB/SIMULINK environment. The results show that the proposed solution can effectively …

Aggregator Index for 24-hour Energy Flexibility Evaluation in an ADN including PHEVs

Authors

Alireza Rashtbaryan,Gevork B Gharehpetian,Hamid Reza Baghaee,Roya Ahmadiahangar

Journal

IEEE Access

Published Date

2024/1/11

This paper proposes obtaining maximum and minimum daily cumulative energy curves and introduces novel hourly and daily energy flexibility indices. Also, it develops a generic methodology that quantifies and formulates energy flexibility as the possible power increase (P_in) or decrease (P_dec) within operational limits. The proposed method can be applied to derive maximum and minimum energy flexibility curves for different devices and aggregate them to extract hourly or daily energy flexibility indices based on the calculation area between daily cumulative energy curves in an hour and 24 hours. The proposed energy flexibility estimation is evaluated by doing offline digital time-domain simulations on a 100-bus home-residential active distribution network (ADN), including flexible equipment/devices (e.g., washing machines, dishwashers, domestic heat water, battery, photovoltaic (PV) panels, and plug-in …

On the control of microgrids against cyber-attacks: A review of methods and applications

Authors

Amirhossein Solat,Gevork B Gharehpetian,Mehdi Salay Naderi,Amjad Anvari-Moghaddam

Published Date

2024/1/1

Nowadays, the use of renewable generations, energy storage systems (ESSs) and microgrids (MGs) has been developed due to better controllability of distributed energy resources (DERs) as well as their cost-effective and emission-aware operation. The development of MGs as well as the use of hierarchical control has led to data transmission in the communication platform. As a result, the expansion of communication infrastructure has made MGs as cyber-physical systems (CPSs) vulnerable to cyber-attacks (CAs). Accordingly, prevention, detection and isolation of CAs during proper control of MGs is essential. In this paper, a comprehensive review on the control strategies of microgrids against CAs and its defense mechanisms has been done. The general structure of the paper is as follows: firstly, MGs operational conditions, i.e., the secure or insecure mode of the physical and cyber layers are investigated and …

Development of a bidirectional HVDC circuit breaker combining a thyristor full-bridge circuit and coupled inductor

Authors

Erfan Taherzadeh,Hamid Radmanesh,Shahram Javadi,Gevork B Gharehpetian

Journal

Iranian Journal of Science and Technology, Transactions of Electrical Engineering

Published Date

2023/11/7

Hybrid circuit breakers (HCBs) play a vital role in developing multi-terminal HVDC (MT-HVDC) systems, owing to their favorable features of fast fault current isolation and low on-state losses. In HCBs, the way of commutation of the fault current and the configuration of the main breaker branch have a significant impact on the performance of interruption. This paper proposes a new bidirectional HCB based on a coupled inductor that realizes robust interruption capability. In the proposed topology, a bridge-type breaker branch is utilized to realize the bidirectional breaking. By using insulated-gate bipolar transistor (IGBT) in combination with coupled-inductor-based circuit in the main breaker branch, the short-circuit fault is isolated. To validate the effectiveness of the proposed HVDC circuit breaker, simulations are performed using Matlab/Simulink.

The effect of phase change material application in double skin Façade on energy saving of residential buildings considering different climates: a case study

Authors

Mahdi Pouran,Farivar Fazelpour,GB Gharehpetian,Alireza Saraei

Journal

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects

Published Date

2024/12/31

The amount of energy expenditure in buildings is 30–40% of the total energy consumption in the world and this share will increase to 50% by 2050. Therefore, reducing energy consumption is a necessity and one of the ways to reduce energy expenditure in buildings is to use passive methods.The use of DSF is expanding as a new approach for building facades due to its ability to prevent excessive heat by absorbing solar radiation. For this purpose, the energy performance of PCM and DSF was studied in three climates of Tehran, Tabriz, and Kish Island, to reveal their energy saving potential.Based on the results of this article, the use of PCM in different layers of DFS can result in a considerable energy saving in Iran residential sector.PCM is integrated both in the external wall and in the partition wall of the DoubleSkin Façade under three different climates. DesignBuilder is used for the thermal analysis of the …

A Novel Model for Battery Optimal Sizing in Microgrid Planning Considering Battery Capacity Degradation Process and Thermal Impact

Authors

Mohammad Amini,Mehrdad Bagheri Sanjareh,Mohammad Hassan Nazari,GB Gharehpetian,Seyed Hossein Hosseinian

Journal

IEEE Transactions on Sustainable Energy

Published Date

2024/1/3

As the optimal size of the battery energy storage system (BESS) affects microgrid operation economically and technically, this paper focuses on a novel BESS sizing model. This model is based on the battery degradation process (BDP) and it can consider temperature impact on the BESS performance. The proposed model aims to accurately minimize microgrid costs. To this end, the major factors affecting the BDP such as temperature, depth of discharge, incomplete/complete cycles, state of charge, and time passage are linearly incorporated into the proposed model to estimate the amount of the BESS capacity loss. To calculate the BESS cycle aging because of the incomplete/complete cycles, a novel linear framework is introduced. Moreover, the relation between the temperature and the allowable BESS capacity is also modeled and integrated into the BESS sizing model to increase the accuracy of the BESS …

Multifunctional Control Algorithm for VSC-Based Grid-Connected Microgrid for Compensation Operation Modes

Authors

Gevork B Gharehpetian,Hamed Joorabli,Vahid Ghods,Mehdi Fallah

Journal

Journal of Energy Management and Technology

Published Date

2024/3/1

In some configurations, microgrid is connected to an AC grid via voltage source converters (VSCs), supplying local non-linear loads (NLLs) of the microgrid connected to the output of the VSC. In such condition, the produced current distortions of the NLLs may flow through the AC grid due to low impedance. Hence, the microgrid should compensate the current distortions, which have been generated by the NLLs. On the other hand, when the AC grid has voltage harmonics, they amplify the produced distortions of the NLLs. To harness these distortions, this paper proposes a new multifunctional control method of the grid connecting microgrid VSC, which can decompose the current distortions into two components originated by the NLLs, and other one by the AC grid voltage harmonics. Then, VSC-based grid-connected microgrid can operate in two compensation modes. The first operation mode includes the compensation of distortions only with considering NLLs contribution. While in the second mode, VSC tries to compensate the distortions with considering contributions of both NLLs and AC grid voltage harmonics. In this mode, the proposed method is able to limit the total harmonic distortion level of AC grid side current in the standard limitation (less than 5%). The effectiveness of the proposed control method is studied using the simulations and experiments.

Active distribution network expansion planning considering microgrids for supplying critical loads

Authors

Jonas V de Souza,Felipe M dos S Monteiro,Paulo T de Godoy,Eduardo N Asada

Published Date

2022/7/17

This work proposes a model for Multistage Expansion Planning of Active Distribution Networks (MEPADN) that takes into account the expansion planning of the distribution system considering Microgrids (MGs) operation, with the possibility of isolated operation of part of the distribution system, the coordinated allocation of Distributed Generations (DGs) and the inclusion of a reliability index (Expected Energy Not Supplied (EENS)) to the model. The expansion problem is solved considering multiple stages and with different load levels. The results have shown that the proposed model allows attaining successfully the objectives, and it is also possible to observe the relation between the increase of the penetration level of DGs with the reduction on the EENS index.

Flexibility enhancement of multi-district DISCOs considering a trade-off between congestion and extractable reserve capacity from virtual energy storage systems

Authors

Morteza Zare Oskouei,Gevork B. Gharehpetian

Journal

Applied Energy

Published Date

2024/1/1

One of the fundamental concerns of distribution companies (DISCOs) is how to satisfy security requirements under uncertain conditions and real-time contingencies. To address this concern, it is vital to employ operational flexibility levers aimed at mitigating congestion and retaining optimal reserve capacity, particularly in critical feeders. Increased interaction between DISCOs and virtual energy storage systems (VESSs) offers an unparalleled opportunity to unlock the energy flexibility of distribution grids at the local level without increasing operational complexity. According to the state-of-the-art, models that tap the economic performance of VESSs while respecting the flexibility and security setpoints adopted by DISCOs in a distributed manner have remained scarce. This study goes beyond by developing a flexibility-oriented decision-making strategy as a single-leader multi-followers stochastic model; in which a …

Review and Comparative Analysis of Deep Learning Techniques for Smart Grid Load Forecasting

Authors

Hossein Shahinzadeh,Hamidreza Sadrarhami,Mohammad Mohsen Hayati,Hassan Majidi-Gharehnaz,Mehdi Abapour,Gevork B Gharehpetian

Published Date

2024/2/21

In the last decade, the water and electricity industry has experienced significant investments in smart grid technologies. Within a smart grid framework, information and energy engage in bidirectional transmission, opening up diverse applications for artificial intelligence, including artificial neural networks, machine learning, and deep learning. This comprehensive review investigates the dynamic landscape of deep learning methodologies applied to load forecasting within smart grids, spanning short-term (STLF), medium-term (MILF), and long-term (LTLF) Forecasting horizons. We scrutinize a range of techniques, encompassing Auto-Encoder Method, Recurrent Neural Network (RNN), Long Short-Term Memory (LSTM), Convolutional Neural Network (CNN), Restricted Boltzmann Machine (RBM), Deep Belief Network (DBN), Deep Boltzmann Machine (DBM), Graph Neural Networks (GNNs), Attention Mechanisms …

A Techno-Economic Scheduling of Distribution System Including Multi-Microgrids Considering System Reconfiguration and Bus Selector Switches

Authors

Shayan Hosseini,Gevork B Gharehpetian,Seyed Babak Mozafari,Mehrnoosh Vatani

Journal

Sustainable Cities and Society

Published Date

2024/4/29

The Microgrid (MG) as an alternative energy system, would reduce power loss, enhance energy consumption efficiency, and improve the system reliability for a sustainable city. Energy scheduling of distribution systems (DSs) including multi-microgrids (MMGs), would result in a multi-objective problem from DS operators’ point of view for a techno-economic operation. In this regard, a multi-objective model for operation scheduling of DS and connected MGs, is proposed in this paper, which also considers the system management solutions such as reconfiguration and determination of the energy trading points for MGs connection. The proposed model is applied to a modified IEEE 33-bus distribution system including 4 MGs. Simulation results and analysis based on the fuzzy satisfying method indicate that the simultaneous consideration of distribution system reconfiguration and Bus Selector Switches (BSSs) for MGs …

Detection and localization of LV winding radial deformation in transformers using electromagnetic waves-a feasibility study

Authors

M Mortazavi,Z Moravej,GB Gharehpetian

Journal

International Journal of Electrical Power & Energy Systems

Published Date

2024/1/1

Recently, online methods based on electromagnetic waves have been proposed to detect the mechanical defects of high voltage (HV) windings in power transformers. In this article, for the first time, the possibility of online detecting and locating the radial deformation (RD) of low voltage (LV) windings using electromagnetic waves is presented. In the proposed method, a high frequency and wideband signal is sent to a simplified model of transformer winding via small antennas. The antennas are connected to the inner side of the oil tank cover through Radio Frequency (RF) cables, so that online monitoring can be realized with minimal changes in the transformer structure. The data of the reflected signals in different states is recorded in a database and sorted as primary data bank. By comparing the results of the sound state with measured signals, the possible faults can be detected. In this paper, the detection and …

Enhancing Power Oscillation Control: Comparative Analysis of Damping Controllers and Hybrid Computational Intelligence Methods for Power System Stabilization

Authors

Aliyu Sabo,Theophilus Ebuka Odoh,Hossien Shahinzadeh,Noor Izzri Abdul Wahab,Majid Moazzami,Gevork B Gharehpetian

Published Date

2024/2/21

In this paper, Artificial ecosystem optimization (AEO) and Ant bee colony (ABC) optimization were used to design damping controllers for power oscillation damping and control. The damping controllers designed are power system stabilizer (PSS), proportional integral derivative-PSS (PID-PSS), fractional order (FO) PID-PSS (FOPID-PSS), tilt integral derivative-PSS(TID-PSS), all designed using the AEO optimization and Neurofuzzy controller (NFC) designed using the ABC optimization. The damping controllers were validated on the IEEE New England power test system which is a ten-machine system. A comparison of results obtained was done based on the settling time of the rotor angle and rotor speed control of the synchronous generators (machines) in the ten-machine power test system. PID-PSS, FOPID-PSS and TID-PSS showed improved rotor angle and rotor speed control in comparison to the PSS …

A Bidirectional DC Circuit Breaker Based on the Coupled Inductor for HVDC Applications

Authors

Erfan Taherzadeh,Hamid Radmanesh,Shahram Javadi,Gevork B Gharehpetian

Journal

Journal of Control, Automation and Electrical Systems

Published Date

2024/4/13

With rapid development of high voltage direct current (HVDC) grids, hybrid circuit breakers (HCBs) have gained more attentions, due to their great ability for fault current interruption in HVDC grids. This paper proposes a novel low-cost HCB based on the coupled inductor, to be utilized in HVDC applications. To realize high current breaking capability with low cost, a coupled inductor in combination with the bridge-type circuit is utilized in the breaker branch. The bridge-type circuit is constructed by the series connection of a not pre-charged capacitor, thyristor, and diodes to provide bidirectional breaking ability. After an interruption, the capacitor in the breaker branch can be discharged quickly to guarantee that the proposed HCB is available for the next interruption. Detailed analysis and design equations are also provided to describe the operation of proposed HCB. The proposed HCB is simulated in Matlab/Simulink …

Wind Power Forecasting Enhancement Utilizing Adaptive Quantile Function and CNN-LSTM: A Probabilistic Approach

Authors

O Abedinia,A Ghasemi-Marzbali,M Shafiei,B Sobhani,GB Gharehpetian,M Bagheri

Journal

IEEE Transactions on Industry Applications

Published Date

2024/1/16

Wind power generation forecasting is a crucial aspect in renewable energy industry since accurate predictions of wind power generation can support the power grid operators and power plant owners to optimize their energy resources management. This will potentially reduce the purchase of extra electricity from other stakeholders or neighboring countries and will consequence significant cost savings and further reliability. With the increasing importance of wind power utilization in modern power systems, employing accurate forecasting model cannot be understated. In this study, a new probabilistic forecasting model based on the utilization of quantile functions is discussed. The proposed model integrates an adaptive optimal weighted continuous ranked probability score (CRPS) is presented to improve the computational efficiency of the prediction process and enabling more accurate forecast output. Also, an …

A new robust nonlinear control strategy for UIPC in isolated hybrid microgrids

Authors

Mahdi Zolfaghari,Gevork B Gharehpetian,Frede Blaabjerg,Amjad Anvari-Moghaddam

Journal

International Journal of Electrical Power & Energy Systems

Published Date

2024/1/1

This paper focuses on the control of unified interphase power controller (UIPC) in isolated hybrid microgrids (HmGs), where the UIPC is used as the main component for interconnecting of AC and DC sub-grids. The investigated HmG encompasses two AC sub-grids and one purely storage DC sub-grid (PSDC) and multiple adjustable loads. A robust nonlinear model reference adaptive control (NMRC) strategy is offered for controlling the UIPC, keeping an acceptable two-way power exchange control with uncomplicated topology. Further, a novel configuration for the DC link power converter is suggested using the dual-active-bridge topology. Also, a harmonic-based modeling method is used to model the UIPC's power converter. The proposed configuration provides bidirectional power flow, increased power density, straightforward adaptation of zero-voltage switching, and direct access to cascading and parallelism …

Transformer differential protection scheme based on self‐adaptive biased characteristic curve and considering cross‐country faults

Authors

Nassim Shahbazi,Sajad Bagheri,Gevork B Gharehpetian

Journal

International Journal of Circuit Theory and Applications

Published Date

2023/3

The differential protection of transformers sometimes does not have reliable performance facing some faults and events such as saturation of current transformers (CTs) during internal and external faults, inrush currents, and cross‐country faults (CCFs). In this paper, a new transformer differential protection scheme based on the self‐adaptive biased characteristic curve and considering CCFs and various disturbances are used. First, the maximum overlap discrete wavelet transform (MODWT) was used to extract the superior characteristics of sampled differential current of the transformer at different levels. Then, by calculating the duty cycle (D) values of energy coefficients extracted in each periodicity by MATLAB software, a new self‐adaptive biased characteristic curve will be obtained in different operating conditions. Finally, the percentage differential protection operation is adjusted based on the new adaptive …

A new and accurate wide area protection method using polarity of current changes

Authors

Sadegh Rahimi,Mohamad Yousefinezhad,Milad Alirezaiean,Majid Valizadeh,GB Gharehpetian

Journal

Electric Power Systems Research

Published Date

2023/4/1

Due to multiple transmitted datasets, complexity, and failure to detect high-impedance faults, many researches have been conducted to overcome protection problems. These studies have addressed some challenges such as the need for a threshold value for detection, or in some cases, prediction of power swings. This paper is an attempt to overcome the problems of previous researches using a new and accurate wide area protection method. The proposed method determines the closest bus to the fault, considering the highest variations in positive-sequence voltage according to the information received from PMUs. To detect the faulted line, all lines connected to the selected bus are examined. Then, the line with the same polarity of current changes on both sides of the line is selected as the faulted line. The performance of the proposed method is evaluated considering various faults in the IEEE 39-bus test …

A Two-Step Stochastic Market-Oriented Approach for Optimal Operation of Commercial VPPs Under Uncertainty

Authors

Jalal Moradi,Hossein Shahinzadeh,Ahmad Hafezimagham,Gevork B Gharehpetian,SM Muyeen,Mohamed Benbouzid

Published Date

2023/5/9

Observing the current trends of development in electrical grids, it can be perceived that the installation of distributed generation resources has had rapid growth on the demand side and distribution grid level. These small-scale sources cannot participate in the upper-level electricity markets. However, with the emergence of the virtual power plants (VPP) concept, these small capacities can be integrated and VPPs can participate and compete in the electricity markets. Nevertheless, there are uncertainties in VPP generation caused by the inherent nature of renewable energy sources (RES) and the inability to accurately predict the price, due to high volatility and intermittency. In this article, a bidding strategy to maximize profit in a VPP is presented. A VPP scheme can also be comprised of a microturbine, an energy storage system (ESS), and an aggregator of a demand response program (DRP) for internal loads. The …

Detection of False Data Injection Attacks in Smart Microgrid using Deep Learning to Improve Classification Algorithms

Authors

Danda B Rawat,Chandra Bajracharya

Journal

IEEE Signal Processing Letters

Published Date

2015/4/10

The transformation of traditional energy networks to smart grids can assist in revolutionizing the energy industry in terms of reliability, performance and manageability. However, increased connectivity of power grid assets for bidirectional communications presents severe security vulnerabilities. In this letter, we investigate Chi-square detector and cosine similarity matching approaches for attack detection in smart grids where Kalman filter estimation is used to measure any deviation from actual measurements. The cosine similarity matching approach is found to be robust for detecting false data injection attacks as well as other attacks in the smart grids. Once the attack is detected, system can take preventive action and alarm the manager to take preventative action to limit the risk. Numerical results obtained from simulations corroborate our theoretical analysis.

See List of Professors in Gevork B. Gharehpetian University(Amirkabir University of Technology)

Gevork B. Gharehpetian FAQs

What is Gevork B. Gharehpetian's h-index at Amirkabir University of Technology?

The h-index of Gevork B. Gharehpetian has been 60 since 2020 and 76 in total.

What are Gevork B. Gharehpetian's top articles?

The articles with the titles of

Multiple Control Strategies for Distributed Battery Energy Storages in Microgrid DC Fast Charging Stations to Improve Load Voltage Variations, Mutual Power Exchange with the …

Aggregator Index for 24-hour Energy Flexibility Evaluation in an ADN including PHEVs

On the control of microgrids against cyber-attacks: A review of methods and applications

Development of a bidirectional HVDC circuit breaker combining a thyristor full-bridge circuit and coupled inductor

The effect of phase change material application in double skin Façade on energy saving of residential buildings considering different climates: a case study

A Novel Model for Battery Optimal Sizing in Microgrid Planning Considering Battery Capacity Degradation Process and Thermal Impact

Multifunctional Control Algorithm for VSC-Based Grid-Connected Microgrid for Compensation Operation Modes

Active distribution network expansion planning considering microgrids for supplying critical loads

...

are the top articles of Gevork B. Gharehpetian at Amirkabir University of Technology.

What are Gevork B. Gharehpetian's research interests?

The research interests of Gevork B. Gharehpetian are: Smart Grid, DGs, Monitoring of Power Transformers, FACTS Devices, HVDC Systems and Power System Transients

What is Gevork B. Gharehpetian's total number of citations?

Gevork B. Gharehpetian has 23,850 citations in total.

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