Research on Stratified Optimal Load Shedding Strategy for Receiving End Power Grid
Wang Zengping1, Zhu Shaoxuan1, Wang Tong1, Qin Hongxia2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China; 2. Beijing Sifang Automation Company Limited by Shares Beijing 100085 China
Abstract：Large-scale power flow transferring overload occurs in the receiving end power grid after the fault removal of EHV and UHV transmission lines, which may lead to cascading trips or even large-scale blackouts. In view of this phenomenon, a hierarchical optimized load shedding strategy for receiving end power grid is proposed. Firstly, considering the characteristics of different voltage levels, a hierarchical model of cross-voltage levels for receiving-end power grids is established. On the one hand, for 500 kV and above voltage level system, taking the minimum total load shedding as the objective function, using improved particle swarm optimization algorithm to establish an optimal load shedding scheme. On the other hand, for the voltage level system below 500 kV, the AHP-fuzzy comprehensive evaluation method is used to construct the lowest comprehensive cost load-shedding plan. Once the control task is received, the load-shedding task is quickly distributed step by step from 500 kV substation to downward according to the plan, and finally the hierarchical optimized load-shedding is realized. New England 10-machine 39-bus example shows that compared with other strategies, this strategy can effectively eliminate line overload and reduce computing time significantly, which is conducive to the realization of on-line engineering applications.
王增平, 朱劭璇, 王彤, 秦红霞. 受端电网分层优化切负荷策略[J]. 电工技术学报, 2020, 35(5): 1128-1139.
Wang Zengping, Zhu Shaoxuan, Wang Tong, Qin Hongxia. Research on Stratified Optimal Load Shedding Strategy for Receiving End Power Grid. Transactions of China Electrotechnical Society, 2020, 35(5): 1128-1139.
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2020, Vol. 35 
