电力系统保护与控制2012，Vol.40Issue(10)：65-70,6.
谐振接地系统故障区段模糊信息融合定位方法
Fault section location based on fuzzy information fusion for NES
郭谋发 1黄建业 2杨耿杰1
作者信息
- 1. 福州大学电气工程与自动化学院,福建福州350108
- 2. 福建省电力有限公司电力科学研究院,福建福州350007
- 折叠
摘要
Abstract
After analyzing the distribution rule of zero-sequence current on NES (neutral earthing via arc extinguishing coil system), two new methods for fault section locating are proposed. One method is based on section zero-sequence current ratio; the other method is based on parallel medium resistance. The former method uses the ratio of two sections zero-sequence current RMS after fault occurring as its criterion, and the latter method uses the changes of section zero-sequence current which is rectified to the same zero-sequence voltage before and after fault occurring as its criterion. Because of existing fault section locating blind zones and misjudgements when using single criterion, this paper constructs membership functions and weight functions for two methods based on fuzzy theory, and uses weighting factor method to realize the fusion of two methods. Results of extensive simulation to different line forms, different fault resistances and different fault positions show the effectiveness of the method which is simple and without blind zones.关键词
谐振接地系统/单相接地故障/故障区段定位/区段零序电流比值/模糊理论/信息融合Key words
NES/ single-phase earth fault/ fault section locating/ section zero-sequence current ratio/ fuzzy theory/ information fusion分类
信息技术与安全科学引用本文复制引用
郭谋发,黄建业,杨耿杰..谐振接地系统故障区段模糊信息融合定位方法[J].电力系统保护与控制,2012,40(10):65-70,6.
