基于“搜索+优化”的主动解列断面选择方法  

Islanding surface selection based on “searching + optimization”

作　　者：王乙斐[1] 刘涤尘[1] 廖清芬[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力自动化设备》2015年第8期53-58,共6页Electric Power Automation Equipment

基　　金：国家电网公司大电网重大专项资助项目课题(SGCC-MPLG029-2012)~~

摘　　要：针对大规模电力系统失稳后应及时进行解列的问题,提出一种"搜索+优化"的主动解列断面选择方法。该方法在"搜索"阶段分2个步骤进行:首先将电力系统等效为无向加权图,以Floyd算法得到节点之间的耦合程度获取公共节点,对原始网络结构进行降维;再依据失稳机组电压相角均值与负荷节点电压相角差的大小,将公共节点划分到相应的集合中,得到初始解列断面。"优化"阶段按照解列原则对初始解列断面进行调整,得到满足孤岛功率平衡约束的解列面。所提算法计算复杂度小,能快速缩减求解策略的规模,确定最终解列断面。以CEPRI 36节点系统和IEEE 118节点系统进行仿真,结果验证了所提方法的正确性与有效性。A method of islanding surface selection based on ＂searching ＋ optimization＂ is proposed for the timely controlled islanding of instable large-scale power system. The ＂searching＂ phase includes two steps：with the power system as an undirected weighted graph,the Floyd algorithm is adopted to calculate the coupling degree between nodes to obtain the public nodes for reducing the dimension of original power grid;each public node is assigned to the corresponding unit set according to the difference between its voltage phase angle and the average voltage phase angle of instable unit set to obtain the initial islanding surface. In the ＂optimization＂ phase,the initial islanding surface is adjusted according to the islanding principle to satisfy the constraints of island power balance. With less complexity,the proposed method reduces the scale of solving strategy to quickly determine the final islanding surface. The CEPRI 36-bus system and IEEE 118-bus system are taken for simulation and the correctness and effectiveness of the proposed method are verified by the simulative results.

关 键 词：FLOYD算法 主动解列 解列策略 电力系统 优化 

分 类 号：TM727[电气工程—电力系统及自动化]