摘要
由于小电流接地系统的复杂性及单相接地故障的特殊性,各种故障选线方法都有其适用范围,单一的选线方法往往不能很好地满足要求。针对多种选线方法进行模糊综合评判的小电流接地系统故障选线方法,对多种选线方法的模糊隶属函数及权重因子的确定进行了探讨。以相间工频变化量比较法、能量函数法及小波变换法3种接地故障选线方法为例进行了模糊综合评判实例仿真,仿真结果表明该方法具有更高的可靠性。
Because of the complication of small current grounding system and the speciality of single-phase grounding fault, each fault line selection method has its own limitation and a single method cannot meet all demands. A fault line selection method for small current grounding system which developed a mode of fuzzy comprehensive evaluation for multiple fault line selection methods was discussed and fuzzy membership functions and weight factors for multiple methods were defined. Three grounding fault line selection methods, energy function, wavelet transform and fundamental component mutation between phases, were chose as simulation examples for fuzzy comprehensive evaluation. The result indicated that the method has higher reliability.
出处
《湖南电力》
2009年第6期8-12,共5页
Hunan Electric Power
关键词
小电流接地系统
继电保护
接地故障选线
信息融合
模糊综合评判
small current grounding system
relay protection
grounding fault line selection
information fusion
fuzzy comprehensive evaluation
