Yonghao Gui

Yonghao Gui

Aalborg Universitet

H-index: 22

Europe-Denmark

About Yonghao Gui

Yonghao Gui, With an exceptional h-index of 22 and a recent h-index of 22 (since 2020), a distinguished researcher at Aalborg Universitet, specializes in the field of Control, Wind Energy, Power Electronics, Power Systems, Microgrids.

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

Dynamic Power Coupling Analysis of Voltage-Oriented Vector Control in Synchronous Reference Frame

H∞ Control for Energy Dispatch in Autonomous Nanogrid with Communication Delays

System Modeling and Robust Stability Region Analysis for Multi-inverters Based on VSG

The Integrated Reference Region Analysis for Parallel DFIGs’ Interfacing Inductors

Energy management systems for forecasted demand error compensation using hybrid energy storage system in nanogrid

Controllable Structure Planning for Energy Internet

Passivity-Based Control of Grid Forming and Grid Following Converters in Microgrids

Gradient-descent-based learning gain for backstepping controller and disturbance observer of nonlinear systems

Yonghao Gui Information

University

Aalborg Universitet

Position

___

Citations(all)

1655

Citations(since 2020)

1495

Cited By

674

hIndex(all)

22

hIndex(since 2020)

22

i10Index(all)

37

i10Index(since 2020)

29

Email

University Profile Page

Aalborg Universitet

Yonghao Gui Skills & Research Interests

Control

Wind Energy

Power Electronics

Power Systems

Microgrids

Top articles of Yonghao Gui

Dynamic Power Coupling Analysis of Voltage-Oriented Vector Control in Synchronous Reference Frame

Authors

Zhen Gong,Xiaorong Xie,Chengxi Liu,Yonghao Gui,Filipe Miguel Faria da Silva

Journal

IEEE Transactions on Power Electronics

Published Date

2024

Dynamic Power Coupling Analysis of Voltage-Oriented Vector Control in Synchronous Reference Frame — Aalborg University's Research Portal Skip to main navigation Skip to search Skip to main content Aalborg University's Research Portal Home Aalborg University's Research Portal Logo Dansk English Home Profiles Projects Publications Activities Research units Facilities Press/Media Prizes Datasets Impacts Search by keywords, name or affiliation Dynamic Power Coupling Analysis of Voltage-Oriented Vector Control in Synchronous Reference Frame Zhen Gong, Xiaorong Xie, Chengxi Liu, Yonghao Gui, Filipe Miguel Faria da Silva AAU Energy The Faculty of Engineering and Science Electric Power Systems and Microgrids Modern Power Transmission Grids Research output: Contribution to journal › Journal article › Research › peer-review Overview Original language English Journal IEEE Transactions on …

H∞ Control for Energy Dispatch in Autonomous Nanogrid with Communication Delays

Authors

Youngwoo Lee,Yonghao Gui,Wonhee Kim

Journal

IEEE Access

Published Date

2024/4/17

This paper proposes an optimal controller and estimator for energy dispatch to balance the power supply and demand considering communication delays. The proposed algorithm involves modeling an autonomous nanogrid (ANG) consisting of distributed energy resources, energy storage systems, loads, an H ∞ controller with a reference power modulation technique, and a state estimator. The ANG was developed to express the dynamic supply-demand energy balance of a nanogird system. Reference power modulation was designed to generate the desired ESS power based on the imbalanced energy. Random communication delays were modeled using a stochastic variable satisfying the Bernoulli random binary distribution. The optimal H ∞ controller and estimator were developed using a linear matrix inequality approach to exponentially stabilize the closed-loop system. Simulations were performed using …

System Modeling and Robust Stability Region Analysis for Multi-inverters Based on VSG

Authors

Rui Wang,Yibo Wang,Pinjia Zhang,Qiuye Sun,Yonghao Gui,Peng Wang

Journal

IEEE Journal of Emerging and Selected Topics in Power Electronics

Published Date

2024/3/18

As the number of inverter-interfaced distributed generators (IIDGs) increases, the decrease in the inertia of the microgrid affects the stability of microgrid voltage and current. The virtual synchronous generator (VSG) control method simulates the output characteristics of the synchronous machine to improve the inertia and damping of the microgrid. However, low-frequency oscillations can occur in systems with multi-VSGs connected in parallel, primarily when operating in island mode. Therefore, this article develops the small-signal state-space model for multi-inverters based on VSG and analyses the robust stability region (RSR) of the control parameters. Firstly, an extensible small-signal state-space model is established and simplified in the dq axis, which is a necessary preprocessing for the subsequent stability analysis. Secondly, the guardian map method based on bialternate product operation is constructed …

The Integrated Reference Region Analysis for Parallel DFIGs’ Interfacing Inductors

Authors

Rui Wang,Xiaohan Yu,Qiuye Sun,Dashuang Li,Yonghao Gui,Peng Wang

Journal

IEEE Transactions on Power Electronics

Published Date

2024/2/1

Although the traditional design of doubly-fed induction generators (DFIGs)’ interfacing inductors consider the peak ripple of the grid-side converter (GSC)’s output current, it does not consider the inductors’ impact on DFIGs’ smallsignal stability. Located in series between the GSC and the stator, the inappropriate selection of the interfacing inductor can easily result to system instability. Therefore, this paper first proposes the integrated reference region analysis for small wind farm's interfacing inductors to improve the traditional design method. Firstly, a new detailed parallel DFIGs’ smallsignal model that considers output currents’ coupling is built in d-q coordinate system with state-space approach. The model focuses on representing the operating states of parallel DFIGs in wind farm. Secondly, the linearized state-space matrix of parallel DFIGs is decomposed into nominal-value matrix and location matrix …

Energy management systems for forecasted demand error compensation using hybrid energy storage system in nanogrid

Authors

Jaeyun Yim,Sesun You,Frede Blaabjerg,Youngwoo Lee,Yonghao Gui,Wonhee Kim

Journal

Renewable Energy

Published Date

2024/2/1

This paper proposes an energy management system (EMS) for nanogrids to balance the power supply and forecasted demand in consideration of forecasting errors arising from high instantaneous demand. The proposed EMS employs a power-balancing optimization process for forecasted demand and a reference power modulation strategy for forecasting errors. This power-balancing optimization utilizes nanogrid sources, such as photovoltaics, fuel cells, and batteries, to meet forecasted demand and a supercapacitor charging process to overcome issues with a low energy density. The proposed reference power modulation strategy is utilized to allocate power from a hybrid energy storage system consisting of a battery and supercapacitor in order to compensate for forecasting errors. In addition, this proposed strategy considers battery and supercapacitor constraints such as the power changing rate and total …

Controllable Structure Planning for Energy Internet

Authors

Yushuai Li,Tianyi Li,Yonghao Gui,David Wenzhong Gao,Yan Zhang

Published Date

2023/1/14

Secure system operations rely on reliable network structures. The loss of controllability may be the main reason to cause cascaded failures for complex network, e.g., Energy Internet (EI). However, the existing studies do not consider the network controllability to guide the system reconfiguration. To address this issue, the paper proposes a new structuring planning method for EI with consideration of controllability and economy. Firstly, the structure planning problem is modeled as a dynamic optimization problem with the tradeoff objectives of maximum social welfare and minimum driven nodes for long-term period. Then, a mixed maximum matching and deep deterministic policy gradient method is presented to obtain the approximate optimal planning solution with strong adaptability. Finally, simulation results demonstrate the effectiveness of the proposed method.

Passivity-Based Control of Grid Forming and Grid Following Converters in Microgrids

Authors

Yonghao Gui,Yaosuo Xue

Published Date

2023/7/16

With the integration of more and more power electronics devices into the grid, it is not easy to guarantee the stability of the whole system due to the complexity of the control structure of various power converters. In this paper, we consider grid-forming and grid-following converters in one microgrid, in which the grid-forming converters support the voltage and frequency of the microgrid and the grid-following converters inject their maximum power into the microgrid. To handle the stability issue, the passivity principle is applied to guarantee the stability of the whole microgrid. We ensure every grid-following converter satisfies the passivity via the port-controlled Hamiltonian method. In addition, we apply the passivity-based proportional-resonant controller to the grid-forming converter. One of the advantages of the proposed method is that the phase lock loop system is eliminated, which may cause stability issues …

Gradient-descent-based learning gain for backstepping controller and disturbance observer of nonlinear systems

Authors

Sesun You,Young Seop Son,Yonghao Gui,Wonhee Kim

Journal

IEEE Access

Published Date

2023/1/5

This paper proposes a gradient-descent-based learning (GL) gain for backstepping controller and disturbance observer (DOB) of nonlinear system. The proposed method consists of the GL gain update law, controller, and DOB. The GL gain update law is proposed to adapt the control gain and DOB gain according to the direction that minimizes the cost function. The mathematical analysis reveals that the GL gain always has a positive sign and upper bound. The controller is designed via a backstepping procedure to track the desired output with GL control gain. The DOB is designed to estimate the unknown external disturbance with the GL DOB gain. Because the control and DOB gains are simultaneously tuned to achieve improved performance, the time consumption for tuning can be reduced. In addition, the peaking phenomenon can be avoided initially by a small initial value of GL gains. The stability of the …

Digital twin empowered PV power prediction

Authors

Xiaoyu Zhang,Yushuai Li,Tianyi Li,Yonghao Gui,Qiuye Sun,David Wenzhong Gao

Journal

Journal of Modern Power Systems and Clean Energy

Published Date

2023/11/17

The accurate prediction of photovoltaic (PV) power generation is significant to ensure the economic and safe operation of power systems. To this end, the paper proposes a new digital twin (DT) empowered PV power prediction framework that is capable of ensuring reliable data transmission and employing the DT to achieve high accuracy of power prediction. With this framework, considering potential data contamination in the collected PV data, a generative adversarial network is employed to restore the historical data set, which offers a prerequisite to ensure accurate mapping from the physical space to the digital space. Further, a new DT empowered PV power prediction method is proposed. Therein, we model a DT that encompasses a digital physical model for reflecting the physical operation mechanism and a neural network model (i.e., a parallel network of convolution and bidirectional long-short-term memory …

Automatic voltage regulation application for PV inverters in low-voltage distribution grids–A digital twin approach

Authors

Yonghao Gui,Karthikeyan Nainar,Catalin-Iosif Ciontea,Jan D Bendtsen,Florin Iov,Kamal Shahid,Jakob Stoustrup

Journal

International Journal of Electrical Power & Energy Systems

Published Date

2023/7/1

This paper proposes a hierarchical coordinated control strategy for PV inverters to keep voltages in low-voltage (LV) distribution grids within specified limits. The top layer of the proposed architecture consists of the designed automatic voltage regulation (AVR) application, which has access to voltage measurements and grid parameters from the LV distribution grid, both current and historical. The AVR application solves a constrained optimization problem, which provides a set of local control set-points that bring the voltage across the grid within bounds. The middle layer consists of a local Volt/VAR controller, which is adjusted by the AVR app, while the bottom layer is the inner-loop controller of the PV inverter. The proposed method not only improves the voltage quality in the grid but also manages the reactive power outputs of PV inverters efficiently. A digital twin of the cyber-physical system has also been …

Comparative Study of Nonlinear Black-Box Modeling for Power Electronics Converters

Authors

Liang Qiao,Yaosuo Xue,Yonghao Gui,Wei Du,Fei Fred Wang

Published Date

2023/10/29

With the increasing penetration level of renewable sources and power electronics loads in modern power systems, accurate and computationally efficient models are needed. Black-box model (BBM) could be a useful method in such systems. However, not very extensive research efforts have been made for power electronics BBM so far, and existing works mostly focus on steady-state operation, neglecting the important transient behaviors such as load transients, voltage transients, and faults. This paper presents a comparative study of three commonly used nonlinear BBM approaches for transient behaviors of power electronics converters. Comparison methods are proposed, and the evaluations are conducted under different transients using a grid-connected single-phase photovoltaic inverter. The findings of this study provide valuable references for further feasibility investigations on implementing BBMs in large …

Voltage Support With PV Inverters in Low-Voltage Distribution Networks: An Overview

Authors

Yonghao Gui,Karthikeyan Nainar,Jan D Bendtsen,Nicole Diewald,Florin Iov,Yongheng Yang,Frede Blaabjerg,Yaosuo Xue,Jianzhe Liu,Tianqi Hong,Jakob Stoustrup

Published Date

2023/5/29

Large solar photovoltaic (PV) penetration using inverters in low voltage (LV) distribution networks may pose several challenges, such as reverse power flow and voltage rise situations. These challenges will eventually force grid operators to carry out grid reinforcement to ensure continued safe and reliable operations. However, smart inverters with reactive power control capability enable PV systems to support voltage quality in the distribution network better. This paper gives an overview of the current state-of-the-art control strategies for handling voltage problems through PV inverters and other devices. In addition, the (control) technical issues of PV systems integrated into the LV distribution network are considered from a control point of view. By comparing the control issues of PV integration into the grid, the paper aims to help distribution system operators to expand the volume of PV generation in the distribution …

Fuzzy Logic-Based Online Energy Management System for Residential Microgrids

Authors

Jingxuan Wu,Shuting Li,Yonghao Gui,Milos Cvetkovic,Juan C Vasquez,Josep M Guerrero

Published Date

2023/10/16

A fuzzy logic based online energy management system (FLEMS) is designed in this paper to achieve the optimal electricity cost in a residential Microgrid (MG). The proposed FLEMS is combined by a local energy price model (LEPM) and a fuzzy-logic strategy. The LEPM will preprocess the sampling data to estimate the electricity market and local MG status. The fuzzy-logic mimics the artificial intelligent assessment to economic issues and make decision for the charging and discharging operation for energy storage system (ESS). In the FLEMS, not only electricity price and supply-demand balance, but also ESS state of charge are considered for the efficient and stable operations. The proposed method does not relay on the accurate prediction of renewable energy source and local loads. Historical experience of the system is involved by the LEPM and guides the ESS operation in the fuzzy-logic. A real-world data …

Fast coordinated power control for improving inertial and voltage support capability of battery energy storage systems

Authors

Zhen Gong,Chengxi Liu,Filipe Faria da Silva,Yonghao Gui,Claus Leth Bak

Journal

CSEE Journal of Power and Energy Systems

Published Date

2023/4/20

This paper proposes a fast coordinated power control method based on two augmented channels (AC) in battery energy storage system (BESS) to improve its inertial and voltage support capability, i.e., a frequency-reactive power channel (FRPC) and a voltage-real power channel (VRPC). For the frequency control, in the power distribution system with high resistance/inductance ratio, the coupling mechanism between rate of change of frequency (RoCoF) and required reactive power (RRP) of grids is analyzed, indicating that RoCoF is proportional to the RRP. Thus, RoCoF is utilized in the FRPC to generate reactive power for the complementary inertial emulating control. Meanwhile, for the voltage control, the coupling characteristics between rate of change of voltage (RoCoV) and demanding real power (DRP) of grids is also studied, revealing that RoCoV is proportional to the DRP. Therefore, it can be adopted in …

Impact of cyber‐attack on coordinated voltage control in low voltage grids

Authors

Asma Farooq,Kamal Shahid,Yonghao Gui,Rasmus Løvenstein Olsen

Journal

IET Renewable Power Generation

Published Date

2023/8

Power grid is facing several challenges such as voltage violation, power losses, and power quality issues due to the high integration of renewable energy sources such as solar and wind. One of the several strategies to overcome the voltage violation problem is the provision of reactive power from wind and solar power plants. Local controller of these plants coordinates with the controller to generate the reactive power. The coordinated controller performs its function based on the information obtained from the whole grid via communication network. Communication network infrastructure has high responsibility to ensure secure and stable services in order to provide reliable voltage control in distribution grids (DGs). Unstable or insecure communication networks can lead to several problems in the power system, such as increased power losses and in worse case blackouts. Therefore, this paper analyses the impact …

Power Decoupling Method for Voltage Source Inverters Using Grid Voltage Modulated Direct Power Control in Unbalanced System

Authors

Zhen Gong,Chengxi Liu,Yonghao Gui,Filipe Faria da Silva,Claus Leth Bak

Journal

IEEE Transactions on Power Electronics

Published Date

2022/11/8

The grid voltage modulated direct power control (GVM-DPC) is a novel power regulation method for grid-connected voltage source inverters (VSI). However, interactions between real and reactive powers still exist in GVM-DPC under unbalanced grid voltage condition, which may deteriorate its transient performance. This article proposes a power decoupling method for GVM-DPC-based VSI in unbalanced systems based on the dynamic feedforward power compensation strategy, which can reduce the coupling magnitudes of real and reactive powers in the transient stages. First, the power coupling mechanism of positive and negative sequence real and reactive powers of VSI under the unbalanced voltage condition is analyzed. Then, the power coupling magnitudes (PCM) are derived according to relationships among the positive sequence components of real power, reactive power and point of common coupling …

Fully distributed dynamic edge-event-triggered current sharing control strategy for multibus DC microgrids with power coupling

Authors

Rui Wang,Weihua Li,Qiuye Sun,Yushuai Li,Yonghao Gui,Peng Wang

Journal

IEEE Transactions on Industrial Informatics

Published Date

2022/7/4

Although the current sharing control of dc microgrids has been widely studied, the high communication bandwidth and global communication network structure information demands hander the renewable energy consumption. Thus, this article proposes a fully distributed dynamic edge-event-triggered current sharing control strategy for multibus dc microgrids with power coupling. First, the system model with power coupling is built, which is further switched to the linear heterogeneous multiagent systems with unknown disturbance. It is an indispensable preprocessing for controller design. Furthermore, the fully distributed current sharing control strategy is proposed through adaptive coupling weights. Note that the global communication network structure information demand is eliminated. Moreover, the fully distributed dynamic edge-event-triggered mechanism is proposed to reduce communication bandwidth …

Comparative Study of Symmetrical Controlled Grid-Connected Inverters

Authors

Shuning Gao,Haoran Zhao,Peng Wang,Yonghao Gui,Vladimir Terzija,Frede Blaabjerg

Journal

IEEE Transactions on Power Electronics

Published Date

2022

The asymmetrical dynamics of the conventional synchronous reference frame phase-locked loop (PLL) enhance the complexity of the system and endanger the stability of the grid-connected voltage source converters. In this article, the admittance modeling of three different symmetrical control strategies, i.e., voltage oriented control with symmetrical PLL, voltage modulated direct power control, and proportional–resonant control, is proposed and uniformed based on the same power tracking property. The voltage feedforward and decoupling of the controllers are both considered. Moreover, due to the symmetrical structure of the three control strategies, their admittance models can directly be modeled under reference frame as single-input single-output systems. In addition, to reveal the similarity between different control methods and emphasize their differences, the admittance models are constructed by using …

Modified cascaded controller design constructed on fractional operator ‘β’to mitigate frequency fluctuations for sustainable operation of power systems

Authors

Muhammad Majid Gulzar,Sadia Murawwat,Daud Sibtain,Kamal Shahid,Imran Javed,Yonghao Gui

Journal

Energies

Published Date

2022/10/21

The demand for energy is increasing at an abrupt pace, which has highly strained the power system, especially with high share of power generation from renewable energy sources (RES). This increasing strain needs to be effectively managed for a continuous and smooth operation of the power system network. Generation and demand exhibit a strong correlation that directly creates an impact on the power system frequency. Fluctuations and disruptions in load frequency can manifest themselves as over-voltages and physical damages in the power grid and, in the worst case, can lead to blackouts. Thus, this paper proposed an effective solution to mitigate the load frequency problem(s), which is initiated by the changing load demand under high penetration of RES. This paper presented an improved cascaded structure, the proportional integral with a fractional operator coupled with proportional derivative PI−FOP+PD. The proposed FOP+PD modifies the (1+PD) controller by introducing fractional properties that improve its tracking efficiency and mitigate frequency fluctuations taking minimal time. The introduction of FOP β diversifies its tracking and overall controlling ability, which translates it as a significant controller. The controller optimal parameters are extracted by deploying a dragonfly search algorithm (DSA). The study of the results illustrates that the proposed design displays efficient performance under any disturbance or uncertainty in the power system.

An overview of the operation architectures and energy management system for multiple microgrid clusters

Authors

Yajuan Guan,Baoze Wei,Josep M Guerrero,Juan C Vasquez,Yonghao Gui

Published Date

2022/9

The emerging novel energy infrastructures, such as energy communities, smart building-based microgrids, electric vehicles enabled mobile energy storage units raise the requirements for a more interconnective and interoperable energy system. It leads to a transition from simple and isolated microgrids to relatively large-scale and complex interconnected microgrid systems named multi-microgrid clusters. In order to efficiently, optimally, and flexibly control multi-microgrid clusters, cross-disciplinary technologies such as power electronics, control theory, optimization algorithms, information and communication technologies, cyber-physical, and big-data analysis are needed. This paper introduces an overview of the relevant aspects for multi-microgrids, including the outstanding features, architectures, typical applications, existing control mechanisms, as well as the challenges.

See List of Professors in Yonghao Gui University(Aalborg Universitet)

Yonghao Gui FAQs

What is Yonghao Gui's h-index at Aalborg Universitet?

The h-index of Yonghao Gui has been 22 since 2020 and 22 in total.

What are Yonghao Gui's top articles?

The articles with the titles of

Dynamic Power Coupling Analysis of Voltage-Oriented Vector Control in Synchronous Reference Frame

H∞ Control for Energy Dispatch in Autonomous Nanogrid with Communication Delays

System Modeling and Robust Stability Region Analysis for Multi-inverters Based on VSG

The Integrated Reference Region Analysis for Parallel DFIGs’ Interfacing Inductors

Energy management systems for forecasted demand error compensation using hybrid energy storage system in nanogrid

Controllable Structure Planning for Energy Internet

Passivity-Based Control of Grid Forming and Grid Following Converters in Microgrids

Gradient-descent-based learning gain for backstepping controller and disturbance observer of nonlinear systems

...

are the top articles of Yonghao Gui at Aalborg Universitet.

What are Yonghao Gui's research interests?

The research interests of Yonghao Gui are: Control, Wind Energy, Power Electronics, Power Systems, Microgrids

What is Yonghao Gui's total number of citations?

Yonghao Gui has 1,655 citations in total.

What are the co-authors of Yonghao Gui?

The co-authors of Yonghao Gui are Frede Blaabjerg, Josep M. Guerrero, Huaguang Zhang, Juan C. Vasquez Q, Peng Wang, Xiongfei Wang.

    Co-Authors

    H-index: 197
    Frede Blaabjerg

    Frede Blaabjerg

    Aalborg Universitet

    H-index: 147
    Josep M. Guerrero

    Josep M. Guerrero

    Aalborg Universitet

    H-index: 102
    Huaguang Zhang

    Huaguang Zhang

    Northeastern University, China

    H-index: 90
    Juan C. Vasquez Q

    Juan C. Vasquez Q

    Aalborg Universitet

    H-index: 83
    Peng Wang

    Peng Wang

    Nanyang Technological University

    H-index: 70
    Xiongfei Wang

    Xiongfei Wang

    Aalborg Universitet

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