基于灰色关联分析法的电压稳定故障筛选与排序

Contingency Screening and Ranking for Voltage Stability Based on Grey Correlation Analysis Method

故障筛选与排序是电力系统电压稳定评估的重要部分。针对以往基于潮流计算筛选方法的单一性,提出了一种新的故障筛选与排序方法。首先结合感应电动机特性、负荷大小、电源支撑及输电线路情况构建一套故障筛选指标体系;其次针对单一指标反映故障严重程度的局限性,采用灰色关联分析法计算综合指标,综合多方面因素评估故障严重程度。采用存在电压稳定问题的实际电网数据对所提方法进行验证,结果表明基于灰色关联分析法的电压稳定故障筛选与排序方法是合理和有效的。

Contingency screening and ranking is an important part of power system voltage stability assessment. In view of the unicity of the existing power flow-based contingency screening method, a new contingency screening and ranking method is proposed in this paper. Firstly, a contingency screening index system is buih by considering the characteristics of induction motor, load capacity, power support and transmission lines. Secondly, in view of the limits of single index in reflecting the severity of contingency, the grey eorrelation analysis method is used to obtain the integrated index and to assess severity of contingency by integrating muhiple factors. The proposed method is verified through the data of an actual power network which has voltage stability problems. The result shows that the voltage stalfility eontingeney screening and ranking method based on grey correlation analysis is reasonable and effective. This work is supported by National High Technology Research and Development Program （863 Program） Project （No. 2015AA050203）, the National Natural Science Fund Project （No.51307051）, the Central University Basic Business Expenses Special Funds for Scientific Research Projects （No. 2014 ZP03, No. 2015ZDO1）; and the National Natural Science Youth Funded Projects （No. 51507116）.