An Enhanced Distributed Voltage Regulation Scheme for Radial Feeder in Islanded Microgrid

Muhammad Zahid Khan, Chaoxu Mu, Salman Habib, Waleed Alhosaini and Emad M. Ahmed
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Muhammad Zahid Khan: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Chaoxu Mu: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Salman Habib: College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China
Waleed Alhosaini: Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka 72388, Saudi Arabia
Emad M. Ahmed: Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka 72388, Saudi Arabia

Energies, 2021, vol. 14, issue 19, 1-19

Abstract: Even the simplest version of the distribution networks face challenges such as maintaining load voltage and system frequency stability and at the same time minimizing the circulating reactive power in grid-forming nodes. As the consumers at the far end of the radial distribution network face serious voltage fluctuations and deviations once the load varies. Therefore, this paper presents an enhanced distributed control strategy to restore the load voltage magnitude and to realize power-sharing proportionally in islanded microgrids. This proposed study considers the voltage regulation at the load node as opposed to the inverter terminal. At the same time, a supervisory control layer is put on to observe and correct the load voltage and system frequency deviations. This presented method is aimed at replacing paralleled inverter control methods hitherto used. Stability analysis using system-wide methodical small-signal models, the MATLAB/Simulink, and experimental results obtained with conventional and proposed control schemes verify the effectiveness of the proposed methodology.

Keywords: microgrid control; distributed control system; distribution network; voltage regulation; power sharing; smart grid (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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