POWER SHARING STRATEGY FOR MESHED MICROGRID BASED ON TIME SEQUENCE AND STAGE CONTROL

Jiang Enyu; Shi Zhengjing; Zhao Jikang; Mi Yang; Lin Shunfu

doi:10.19912/j.0254-0096.tynxb.2020-1324

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (8) : 490-497. DOI: 10.19912/j.0254-0096.tynxb.2020-1324

POWER SHARING STRATEGY FOR MESHED MICROGRID BASED ON TIME SEQUENCE AND STAGE CONTROL

Jiang Enyu¹, Shi Zhengjing¹, Zhao Jikang², Mi Yang¹, Lin Shunfu¹

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Abstract

Aiming at the problem that the reactive power in the AC microgrid with mesh structure cannot be divided equally and the system circulating current is generated, an improved droop control strategy based on sequential phased control is proposed. First, the iterative method of phased sequential signal control is used to eliminate the adverse effect of line impedance mismatch on the accuracy of reactive power distribution. Secondly, when the output voltage of the DG unit drops to a limited minimum value, the central controller sends a timing signal to make each DG switch to the voltage recovery stage, and synchronously recover the voltage to the reference value. In order to maintain the independence of the equal distribution of reactive power during the voltage recovery process, the stability analysis of the microgrid is implemented with a micro power supply of equal capacity as an example. Finally, through Matlab/Simulink simulation and RT-LAB experiments, the correctness of the proposed strategy is verified.

Key words

microgrid / mesh networking / power sharing / droop control / timing signal

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Jiang Enyu, Shi Zhengjing, Zhao Jikang, Mi Yang, Lin Shunfu. POWER SHARING STRATEGY FOR MESHED MICROGRID BASED ON TIME SEQUENCE AND STAGE CONTROL[J]. Acta Energiae Solaris Sinica. 2022, 43(8): 490-497 https://doi.org/10.19912/j.0254-0096.tynxb.2020-1324

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