Integrated Planning and Operation Evaluation of Micro-Distribution Network Based on Flexible Multi-State Switch Interconnection
Li Zhengtian1, Ye Yuqing1, Wang Zixuan1, Wu Yuqi1, Xu Haibo2
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China; 2. Guangdong EAST Power Co. Ltd Dongguan 523808 China
Abstract：Flexible multi-state switch（FMS）is a new type of power electronic equipment for future micro-distribution network. It can not only improve the power flow distribution and the permeability of distributed power supply, but also realize the flexible reconnection of the micro networks after the islanding operation with minor impacts. Considering its high cost, given the active distribution network composed of multiple micro networks interconnected by FMSs, the access location and timing operation values of the FMSs were explored with the operation economy as the target. Firstly, the constraint conditions of the active distribution network containing FMSs were established. Meanwhile the objective function including the electricity cost of distribution network, installation and maintenance costs of the FMSs and energy storages was established. On this basis, the nonlinear items in the distribution network model were linearized and the second order cone transformations were conducted to improve the solving efficiency of the planning problem. Finally, the objective function was solved given the constraint conditions, and different schemes were compared through the operation economy index and node voltage offset, and the optimal installation and operation scheme was obtained. Moreover, through typical scene analysis, transient simulation of grid-connection of micro networks and algorithm comparison, the effectiveness of FMSs for improving the operation level of micro-distribution networks and the efficiency of the solving algorithm were verified.
李正天, 叶雨晴, 王子璇, 吴宇奇, 徐海波. 基于柔性多状态开关互联的微配网一体化规划及运行评估[J]. 电工技术学报, 2021, 36(zk2): 487-495.
Li Zhengtian, Ye Yuqing, Wang Zixuan, Wu Yuqi, Xu Haibo. Integrated Planning and Operation Evaluation of Micro-Distribution Network Based on Flexible Multi-State Switch Interconnection. Transactions of China Electrotechnical Society, 2021, 36(zk2): 487-495.
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