基于限流可行方案边界集的最优支路投切  

Optimal transmission switching based on SCC-feasible-schemes crucial set

作　　者：周宁[1] 袁博 吴晓波[1] 张章 吴浩[1] ZHOU Ning;YUAN Bo;WU Xiao-bo;ZHANG Zhang;WU Hao(School of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;State Grid Hebei Economic Research Institute,Shijiazhuang 050011,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]国网河北省电力有限公司经济技术研究院,河北石家庄050011

出　　处：《能源工程》2020年第6期91-96,共6页Energy Engineering

基　　金：国网河北省电力有限公司科技项目(kj2018-054/5204JY17000)。

摘　　要：针对在最优支路投切中难以处理非凸非线形的短路电流约束问题,基于限流全方案的性质,定义了一种可通过少量方案判断所有投切方案短路电流状况的可行方案边界集,将其代替节点自阻抗约束,建立了考虑短路电流约束的最优支路投切模型并提出了求解方法。将原问题分解为最优支路投切主问题和短路电流约束子问题;子问题利用可行方案边界集对主问题求解结果进行检验,当短路电流约束不满足时向主问题添加割平面约束;主问题迭代求解直至满足限流要求。实际电网算例表明,限流可行方案边界集在线路投切方案中占比很小,不会造成计算机的存储负担,其与最优支路投切的结合可提升系统运行经济性并兼顾短路电流安全。Aiming at solving the difficulty of handling non-convex and non-linear short-circuit current(SCC) constraints in the optimal transmission switching(OTS) model, a SCC-feasible-scheme crucial set(SCC-FCS) is defined, by which the SCC status of all switching schemes through a small number of schemes can be judged. Without the node self-impedance constraint, an OTS model considering SCC constraint is established and a solution method is proposed. The original problem is decomposed into the OTS main problem and the SCC constraint sub-problem. The solution of the main problem can be verified using SCC-FBS in the sub-problem, and a cut plane is added to the main problem when the SCC is not satisfied. The main problem is solved iteratively until the SCC is satisfied. The actual grid example shows that SCC-FCS accounts for a small proportion in the line switching schemes, which will not cause the storage burden of the computer. The combination with the OTS can improve the system’s operating economy and take into account the SCC safety.

关 键 词：短路电流﹔最优支路投切 限流可行方案边界集 

分 类 号：TM713[电气工程—电力系统及自动化]