中国电力2012，Vol.45Issue(3)：1-6,6.
基于近似熵的小电流接地系统故障区段定位方法
A novel fault location method based on the approximate entropy for small current grounding system
摘要
Abstract
A new fault location method based on approximate entropy for the transient zero-mode power was proposed. In this method, the approximate entropy value of every detection point for transient zero-mode power was calculated first. The scale factor value of approximate entropy for rach section was then calculated and compared to the threshold which preset in control main station. If the scale factor value is greater than the threshold, the section is determined as healthy, otherwise faulty. A large number of ATP simulation shows that fault in both ungrounded system and grounded system with are suppression coil can be located effectively with random initial phase and transition resistance. The method has good performance even with grounding impedance as high as 5 000 ohms. According to the ratio curve of scale factor versus margin sellings, the optimal working range for each initial phase was also defined.关键词
暂态零模功率/近似熵/比例因子值/故障定位/阈值Key words
transient zero-mode power/ approximate entropy/scale factor value/ fault location/ threshold分类
信息技术与安全科学引用本文复制引用
王晓卫,张涛,田书,张玉均,李涛,程志磊..基于近似熵的小电流接地系统故障区段定位方法[J].中国电力,2012,45(3):1-6,6.基金项目
煤炭青年基金资助项目(117160) （117160）
河南理工大学实验室开放基金资助项目(SKJA09034) （SKJA09034）
河南省控制工程重点学科开放实验室资助项目(KG2011-15) （KG2011-15）
河南理工大学SRTP训练计划资助项目(10-3-002) （10-3-002）
