考虑同调机组的电力系统主动解列断面搜索方法*

将电力系统解列断面搜索问题转化为单目标多约束优化问题,提出了一种考虑同调机组的解列断面搜索新方法。节点间电抗值的大小反映了其电气连接强弱程度。首先以节点间线路电抗值为线路权值,利用Dijkstra算法计算同调机群中发电机之间最小电抗连接线路,得到同调机组连通图,之后用prim算法得到同调机组连通图的最小生成树,并将其等值为一个节点,从而保证电力孤岛内机组连通性。最后利用Dinic算法求得非同调机群间最小潮流割集,得到最优解列断面。对经典IEEE-39节点系统进行算例仿真,验证了文中所提出方法能够快速准确定位解列断面。

A searching method for power system controlled splitting sections considering coherent generators

the search of power system controlled islanding surfaces problem is transformed into a single-objective multi-constraint optimization problem, and a new searching method for power system controlled islanding surfaces considering coherent generators is proposed. The magnitude of the reactance between nodes reflects the electrical contact degree of the two nodes, and the reactance value between the nodes is used as the line weight. The Dijkstra algorithm is used to calculate the minimum reactance value between the generator in the coherent generators group and get the coherent generators connection diagram. The prim algorithm is used to get the minimum spanning tree of the coherent generators connection diagram, The minimum spanning tree is equaled as a node, thus ensuring the connectivity of the generators in the island. The Dinic algorithm is used to obtain the minimum power flow cutset between non-coherent generators groups, and the optimal solution of power system controlled islanding surfaces is obtained. The simulation of the IEEE-39 node system verify that this method can determine the position of islanding surfaces quickly and accurately.