A Power Transfer Optimization Model of Active Distribution Networks in Consideration of Loop Closing Current Constraints
Zhou Niancheng1, Gu Feiqiang1, Lei Chao2, Yao Yuanwen2, Wang Qianggang1
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China; 2. State Grid Sichuan Electric Power Company Tianfu Power Supply Company Chengdu 610000 China
Abstract：Loop closing operation is a necessary means to realize load transfer without power cut, but it may generate a high loop closing current and lead to failure of power transfer. In order to fully exploit the regulatory potential of distributed generation (DG) in active distribution networks, this paper analyzes the active regulation conditions of the loop closing power separating nodes of the feeders with DGs, and its loop closing steady state and transient current constraints are also obtained. Then, a power transfer optimization model is proposed in the constraints of distribution network power balance, radial grid structure and substation transfer capacity limitation, for the objective function of minimum switching number. Afterwards, a verification of loop closing current constrains and optimal regulation of DGs’ outputs model is established in the constraints of loop closing steady state and transient current constraints, for the objective function of minimum DGs’ outputs change. And the above models are integrated to form a power transfer optimization model of active distribution networks in consideration of loop closing current constraints. Finally, the validity of the model is verified by a case study of a practical distribution network.
周念成, 谷飞强, 雷超, 姚元文, 王强钢. 考虑合环电流约束的主动配电网转供优化模型[J]. 电工技术学报, 2020, 35(15): 3281-3291.
Zhou Niancheng, Gu Feiqiang, Lei Chao, Yao Yuanwen, Wang Qianggang. A Power Transfer Optimization Model of Active Distribution Networks in Consideration of Loop Closing Current Constraints. Transactions of China Electrotechnical Society, 2020, 35(15): 3281-3291.
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2020, Vol. 35 
