Title: A cooperative control method of voltage imbalance in microgrid with multiple micro sources

Authors: Wei Shu; Dajiang He

Addresses: School of Electrical and Information Engineering, Huaihua University, Huaihua 418000, China; Key Laboratory of Intelligent Control Technology for Waling-Mountain Ecological Agriculture in Hunan Province, Huaihua 418000, China ' School of Electrical and Information Engineering, Huaihua University, Huaihua 418000, China; Key Laboratory of Intelligent Control Technology for Waling-Mountain Ecological Agriculture in Hunan Province, Huaihua 418000, China

Abstract: In order to overcome the problems of unstable current waveform, high voltage imbalance and long voltage control time in traditional voltage imbalance control methods for microgrid, a new cooperative control method of voltage imbalance in microgrid with multiple micro sources is proposed in this paper. Based on the analysis of microgrid structure, the dynamic phasor model of microgrid voltage is constructed. On this basis, a cooperative controller is designed to realise the voltage balancing control of microgrid with multiple micro sources. In order to verify the cooperative control effect of voltage imbalance in microgrid, a comparative experiment is designed. The experimental results show that the current waveform of the proposed method is stable, the voltage imbalance is only 2.5%, and the cooperative voltage control time is less than 7 s, which shows that the proposed method has high efficiency and good cooperative control effect of voltage imbalance in microgrid.

Keywords: multi-micro source microgrid; dynamic phasor model; voltage imbalance; cooperative control.

DOI: 10.1504/IJCIS.2023.130449

International Journal of Critical Infrastructures, 2023 Vol.19 No.2, pp.154 - 171

Received: 16 Oct 2020
Accepted: 12 Apr 2021
Published online: 21 Apr 2023 *

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