基于特高频法的开关柜局部放电识别方法研究  

Research on Partial Discharge Identification Method of Switchgear Based on UHF Method

作　　者：何金 田涛 宋晓博[1] 王海滨 陈荣[1] 朱旭亮 HE Jin;TIAN Tao;SONG Xiaobo;WANG Haibin;CHEN Rong;ZHU Xuliang(State Grid Tianjin Electric Power Company Electric Power Research Institute,Tianjin 300384,China;State Grid Tianjin Electric Power Company Ninghe Power Supply Branch,Tianjin 301800,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384 [2]国网天津市电力公司宁河供电分公司,天津301800

出　　处：《高压电器》2020年第11期90-95,101,共7页High Voltage Apparatus

基　　金：国网天津市电力公司科技项目(KJ20-1-40)。

摘　　要：特高频法(UHF)具有抗外界干扰能力强、检测灵敏度高等优点,是开关柜局部放电检测方法中最有效的方法之一。文中根据开关柜中常见的局部放电类型设计了针板放电,气隙放电和悬浮放电3种缺陷模型,并基于特高频法进行了局部放电识别方法的进一步研究。研究表明,根据不同类型局部放电的PRPD图谱的特征及其差异,采用支持向量机(SVM)结合逻辑回归方法,提取PRPD图谱特征变量,可以有效识别单一或组合型局部放电的类型。Based on the advantages of strong anti-interference and high detection sensitivity,Ultra-High Frequency(UHF)method becomes one of the most effective means on partial discharge(PD)detection.In this paper,accord-ing to the common types of PD,the models of suspended discharge,internal discharge and needle plate discharge were designed,and the further research of PD detection based on UHF was implemented.The research showed that,according to the characteristics of PRPD(phased resolved partial discharge)spectra of various PD and their differ-ences,when the characteristic variables of the PRPD spectra was extracting by the way of support vector machine(SVM)combined with logistic regression methods,the types of PD can be identified effectively.

关 键 词：局部放电 支持向量机(SVM) 局放检测 特高频 

分 类 号：TM591[电气工程—电器] TM855