一种考虑发电机同调分群的大电网快速主动解列策略

A Fast Active Islanding Scheme Considering Generators' Coherent Partition

针对当前主动解列研究中的快速性难题,提出一种考虑发电机同调分群的大电网快速解列策略。该方法在构建大电网图论模型基础上,第一步采用SW(Stoer-Wagner)算法求解发电机动态连接图的最小割,获得发电机分群结果;第二步以最小潮流冲击为目标函数,通过改进的Dinic最大流算法快速搜索最优解列断面。这两个步骤的解列策略,无需对全网进行化简,能够在线获得全局最优解列断面。通过对IEEE 118节点系统和华中电网系统的仿真计算,验证了该方法的正确性、有效性和快速性。

For solving the fast active islanding problem in large power sy s tem, this paper presents a two- stage fast islanding strategy, based on the SW（ Stoer-Wagner） algorithm and the Dinic algorithm,for large power networks. On the basis of building a large power grid graph theory model , the first step employs the Stoer-Wagner algorithm to get the generators partition based partial derivative weight figure. Then the grouping of generators is obtained. In the second step, the optimal splitting boundary is found fast through the improved Dinic maximum flow algorithm with the objective of minimum power flow impact. The proposed strategy needs no reduction of the whole power network. So the onl ine global optimal solution can be acquired. Simulations on the IEEE 118-bus power system and the Central China Power grid show that the proposed strategy is correct, effective, and fast.