基于小波分析的配网自动化系统中小电流接地故障定位研究  

Research on Small and Medium Current Grounding Fault Location in Distribution Automation System Based on Wavelet Analysis

作　　者：田成 袁剑 TIAN Cheng;YUAN Jian(Technical Training Center,State Grid Hubei Electric Power Co.,Ltd.(Wuhan Electric Power Vocational and Technical College),Wuhan,Hubei 430074,China;Wuhan Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan,Hubei 430023,China)

机构地区：[1]国网湖北省电力有限公司技术培训中心(武汉电力职业技术学院),湖北武汉430074 [2]武汉市政工程设计研究院有限责任公司,湖北武汉430023

出　　处：《自动化应用》2023年第23期176-178,共3页Automation Application

摘　　要：配网系统中小电流接地故障定位监测节点的部署为独立形式,故障定位识别范围较小,导致故障定位耗时较长。为此,本文提出基于小波分析的配网自动化系统中小电流接地故障定位研究,首先结合实际的定位要求,获取故障特征信息,并采用交叉的方式扩大故障定位识别范围,部署交叉定位节点;然后以此为基础,设计小波分析配网小电流接地故障定位模型,并采用分段边界测定实现故障定位。结果表明,与传统配网数据小电流接地故障定位方法和传统零序电压分布特征小电流接地故障定位方法相比,本文设计的小波分析小电流接地故障定位方法最终得出的故障定位耗时被较好地控制在0.2 s以内,说明在小波分析的辅助下,本文设计的故障定位方法更为高效、精准,且误差可控。The deployment of s mall and medium-sized current grounding fault location and monitoring nodes in the distribution network system is in an independent form,with a small range of fault location and identification,resulting in a longer fault location time.Therefore,this paper proposes a research on the localization of small and medium-sized current grounding faults in distribution network automation systems based on wavelet analysis.Firstly,based on actual positioning requirements,fault feature information is obtained,and the fault localization and recognition range is expanded through cross over,and cross localization nodes are deployed.Then,based on this,a wavelet analysis model for small current grounding fault location in the distribution network is designed,and segmented boundary measurement is used to achieve fault location.The results show that compared with traditional distribution network data small current grounding fault location methods and traditional zero sequence voltage distribution characteristics small current grounding fault location methods,the fault location time obtained by the wavelet analysis small current grounding fault location method designed this time is better controlled within 0.2 s,indicating that with the assistance of wavelet analysis,the designed fault location method is more efficient,accurate,and error controllable.

关 键 词：小波分析 配网自动化 可控系统 接地故障 故障定位 

分 类 号：TM77[电气工程—电力系统及自动化]