按有功和无功指标自动故障选择和排序的统一模型和统一算法

本文提出用网络规划法对预想事故进行自动选择和排序。网络规划法能适应网络拓朴结构的变更,极其容易地模拟发电和输电支路的停运,有利于事故的选择和排序,为电力系统N—1安全分析提供迫切的信息。文中根据电网中的有功和无功率之间存在弱耦合,采取有功和无功解耦进行自动故障选择和排序计算,分别以有功总负荷削减量和无功补偿量作为评定事故严重程度的性能指标,两类子问题采用统一模型和统一算法,且通用一个程序进行计算。文中对IEEE 5、14、30、57、118节点系统进行了计算,获得了较为满意的结果。

AUTOMATIC CONTINGENCY SELECTION AND RANKING USING AN UNIFIED MODEL AND ALGORITHM FOR P - AND Q - SUBPROBLEM

A new approach of the automatic contingency selection and ranking with the network flow programming (NFP) is presented in this paper. NFP is adaptable to change the network topology as the transmission or generation branches arc in single or multiple outage. Thus the fast calculation of the contingency states by NFP cm provide the urgent information in real time N- 1 security analysis. In the paper, automatic contingency selection and ranking forP- and Q-type subproblem arc solved by an unified network flow model and algorithm. It is based on the existence of weak coupling between real and reactive quantities in power systems. The performance indices to assess the severity of contingencies are defined as the total real and reactive load required to be curtailed. The proposed ACS technique including the model and its algorithm are examined with IEEE 5-, 14-, 30-, 57- and 118- bus test systems on M-340. And the encouraging results are given in the paper.