一种小电流接地系统故障行波精确定位方法  

A fault location method of single phase earth fault in small current neutral grounding system

作　　者：赵海龙 陈钦柱 梁亚峰 庞松岭 ZHAO Hailong;CHEN Qinzhu;LIANG Yafeng;PANG Songling(Electric Power Research Institute of Hainan Power Grid Corporation,Haikou 570311,China;Key Laboratory of Physical and Chemical Analysis for Electric Power of Hainan Province,Haikou 570311,China)

机构地区：[1]海南电网有限责任公司电力科学研究院,海南海口570311 [2]海南省电网理化分析重点实验室,海南海口570311

出　　处：《电力系统保护与控制》2019年第19期85-93,共9页Power System Protection and Control

基　　金：国家科技支撑计划课题(2013BAA01B03);中国南方电网有限责任公司科技项目资助(073000KK52180005)~~

摘　　要：针对小电流接地系统单相接地故障定位中行波波头难以检测的问题,并且对于当前检测方法中希尔伯特黄检测方法中存在模态混叠、计算效率不高和小波检测方法中小波基选择困难和计算量大等问题,提出一种基于变分模态分解(Variational Mode Decomposition, VMD)和Teager 能量算子(Teager Energy Operator, TEO)的单端行波测距方法。该方法能够较好地检测行波波头,并且能大大降低计算复杂度。通过设置对故障测距定位的影响因素,在ATP-EMTP 与Matlab 综合仿真下验证了方法的可靠性。仿真研究表明此方法进行线路测距定位可靠性好、准确度高。In view of the problem that it is difficult to detect traveling wave head in fault localization of single-phase grounding of small current grounding system, and for the current detection method of Hilbert yellow, there are some problems such as mode mixing, low computational efficiency, difficulty in selecting medium and small wave basis of wavelet detection method and large computational amount. Based on Variational Mode Decomposition (VMD) and Teager Energy Operator (TEO), a single-end traveling-wave ranging method is proposed. This method can detect the traveling wave head and reduce the computational complexity greatly. The reliability of the method is verified by the comprehensive simulation of ATP-EMTP and Matlab. The simulation results show that this method has good reliability and high accuracy.

关 键 词：配电线路 单端行波测距 VMD 行波检测 TEO 

分 类 号：TM75[电气工程—电力系统及自动化]