An Improved Reactive Power Sharing in an Isolated Microgrid with a Local Load Detection

doi:10.23919/CJEE.2023.000021

Chinese Journal of Electrical Engineering ›› 2023, Vol. 9 ›› Issue (2): 14-26.doi: 10.23919/CJEE.2023.000021

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An Improved Reactive Power Sharing in an Isolated Microgrid with a Local Load Detection

Issam A. Smadi^*, Luay I. Shehadeh

Department of Electrical Engineering, Jordan University of Science and Technology, Irbid 22110, Jordan

Received:2022-08-03 Revised:2023-01-05 Accepted:2023-02-11 Online:2023-06-25 Published:2023-06-28
Contact: *E-mail: iasmadi@just.edu.jo
About author:Issam A. Smadi (Senior Member, IEEE) received the B.Sc. degree in Electrical Engineering from Engineering Technology College, Al Balqa Applied University, Amman, Jordan, in 2000, the M.Sc. degree in Electric Power and Control Engineering from the Jordan University of Science and Technology, Irbid, Jordan, in 2003, and the Ph.D. degree in Electrical and Computer Engineering from Yokohama National University, Yokohama, Japan, in 2009. From 2009 to 2011, he was a Postdoctoral Fellow with the Department of Electrical and Computer Engineering at Yokohama National University. From 2011 to 2013, he was a Researcher and Development Electrical Engineer with Fuji Electric Company, Ltd., Tokyo, Japan. Since 2013, he has been with the Electrical Engineering Department of Jordan University of Science and Technology. He was appointed as a Manager of the Department of Linking with Industry, Consultative Center for Science and Technology, from 2018 to 2019. Also, he has been the Department Chair of the Electrical Engineering Department of Jordan University of Science and Technology from 2019 to 2022. Currently, he is an Associate Professor. His research interests include integrating renewable energy in power systems, control in power electronics, dynamic state estimation, electric drives, power system dynamics, and control.
Luay I. Shehadeh received his B.Sc. degree in Electrical Engineering from Hashemite University, Zarqa, Jordan, in 2017, and a M.Sc. degree in Control and Power Engineering from Jordan University of Science and Technology, Irbid, Jordan, in 2022. His research interests include grid synchronization, power electronics, electrical power systems’ stability and control, smart grid, and renewable energy generation systems. Since 2018, he has been with the Airport International Group, Amman, Jordan, as Electromechanical Engineer.

Abstract

Abstract: Accurate reactive power sharing is one of the main issues in isolated microgrids to avoid circulating currents and overloading small distributed generation (DG) units. A simple and enhanced method for improving reactive power sharing among parallel-connected DG systems in an isolated microgrid was proposed. The proposed method uses a compensator term with an integral action to minimize the reactive power-sharing error internally without any need for communication or information shared among the DG units. Moreover, a small disturbance carrying part of the reactive power-sharing error is injected into the active power-droop controller, maintaining the essential system parameters within their allowable limits. Consequently, a simple compensation trigger system is proposed to effectively detect any local load change in the network and provide compensation gains to activate the proposed control method. The stability of the proposed method was verified and analyzed using a detailed small-signal model. Moreover, the effectiveness and robustness of the proposed method were validated through comprehensive simulation studies and comparisons with other related techniques.

Key words: Adaptive droop, distributed generation (DG), droop control, microgrid, power management, reactive power-sharing

Issam A. Smadi, Luay I. Shehadeh. An Improved Reactive Power Sharing in an Isolated Microgrid with a Local Load Detection[J]. Chinese Journal of Electrical Engineering, 2023, 9(2): 14-26.

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An Improved Reactive Power Sharing in an Isolated Microgrid with a Local Load Detection

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