Smooth Control Strategy for Emergency Switching of Interconnected Microgrids via FMS

被引：0
|
作者：
Wang J. [1 ]
Huang W. [1 ]
Yu M. [1 ]
Tai N. [1 ]
Ma Z. [2 ]
机构：
[1] Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Minhang District, Shanghai
[2] State Grid Jiangsu Electric Power Co., Ltd., Nanjing Power Supply Branch, Jiangsu Province, Nanjing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2022年 / 42卷 / 21期
关键词：
adaptive droop coefficient; flexible multi-state switch; interconnected microgrids; mode emergency switching process; smooth switching method;
D O I：
10.13334/j.0258-8013.pcsee.211684
中图分类号：
学科分类号：
摘要：
The flexible interconnected multi-microgrids composed of microgrids and flexible multi-state switches (FMS) are one of the main ways to construct active distribution network with high proportion of distributed generation(DG). To solve the mode switching impact of flexible interconnected microgrids in the emergency state, a smooth switching strategy for the coordinated control of the microgrids and the flexible multi-state switch was proposed. The characteristics of the three stages of the power regulation, transition state, and emergency control were analyzed, and an adaptive control method of the droop coefficient of the energy storage system(ESS) was proposed to solve the voltage and frequency stability problems caused by the imbalance of the source and load during the switching time delay. A smooth switching method of collaborative phase angle compensation, collaborative control switching and pre-synchronization was proposed to smooth out the instantaneous impact of switching caused by the sudden change of the initial phase angle and control mode of FMS. A simulation model of flexible interconnected microgrids was established through PSCAD/EMTDC, and the proposed strategy was verified to effectively suppress the impact of emergency switching of microgrid mode and thus realizing the continuous safe and stable operation of the microgrids. © 2022 Chinese Society for Electrical Engineering. All rights reserved.
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页码：7695 / 7705
页数：10
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