基于电网分区的多阶预选故障集筛选及排序方法研究

Preselection and Ranking Method of Multi-Fault Sets Based on Subarea Division

为了同时保证故障集筛选的系统性及筛选效率,文章提出在电网分区的基础上进行故障集的筛选。把加权极大边介数作为挑选关键支路的指标,并在此基础上提出适用于故障集筛选的电网分区终止条件;提出重要故障阈的概念,在分区的基础上搜索广义断面形成故障阈,将故障集的筛选范围大大缩小;综合系统脆弱性和支路脆弱性提出了故障集重要度排序的指标,避免了单一模式排序带来的偏见。某实际电网的算例研究验证了该方法的有效性。

In order to ensure the systematization and efficiency of fault set selection, this paper puts forward a method of fault set selection based on the subarea division. The weighted maximum edge betweenness is used as the index to select the key branch, and the end criterion of the division is put forward. Consequently, the concept of critical fault domain is proposed, which is based on searching the sections, and this concept greatly reduces the selection range. Furthermore, the comprehensive ranking index of fault sets is proposed considering both the system vulnerability and the branch vulnerability, which avoids the inaccuracy caused by single ranking index. A case study of practical system verifies the validity of this method.