A cooperative control method of voltage imbalance in microgrid with multiple micro sources
by Wei Shu; Dajiang He
International Journal of Critical Infrastructures (IJCIS), Vol. 19, No. 2, 2023

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.

Online publication date: Fri, 21-Apr-2023

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