基于PRPD和PSA谱图的大电机主绝缘典型绝缘缺陷局部放电特性分析  

PD characteristics of typical insulation defects in main insulation of large motor based on PRPD and PSA pattern

作　　者：王瑞珏[1] 张鹏宇 王伟 张亦凌 康爱亮 WANG Ruiyu;ZHANG Pengyu;WANG Wei;ZHANG Yiling;KANG Ailiang(State Grid Shanxi Electric Power Company,Taiyuan 030021,China;State Grid Taiyuan Power Supply Company,Taiyuan 030012,China;State Grid Shanxi Electric Power Research Institute,Taiyuan 030001,China;State Grid Tianjin Baodi Power Supply Company,Tianjin 301800,China;National and Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]国网山西省电力公司,山西太原030021 [2]国网太原供电公司,山西太原030012 [3]国网山西省电力公司电力科学研究院,山西太原030001 [4]国网天津宝坻供电公司,天津301800 [5]太原理工大学矿用智能电器技术国家地方联合工程实验室,山西太原030024

出　　处：《绝缘材料》2024年第11期119-126,共8页Insulating Materials

基　　金：山西省高等学校科技创新项目(2022L062)。

摘　　要：大电机主绝缘在运行过程中会产生多种绝缘缺陷,仅利用局部放电相位(PRPD)谱图无法全面反映绝缘缺陷的特性。本文在实验室环境下模拟了内部气隙、槽内线圈磨损、端部半导体涂层及防晕层交叠部位故障、表面污染等4种典型的绝缘缺陷,并在屏蔽室提取其放电信息,分别绘制PRPD谱图及脉冲序列分析(PSA)谱图,结合不同电压等级下PRPD谱图及PSA谱图特性,对典型绝缘缺陷的放电特征进行分析。结果表明:综合考虑PRPD谱图的对称性、放电幅值、谱图包络线形状等特性及PSA谱图的放电簇数量、放电簇分布位置、放电簇形状等特性,可以较为准确地对4种典型绝缘缺陷进行识别。The main insulation of large motor will produce many kinds of insulation defects during its operation process,and only used the phase resolved partial discharge(PRPD)pattern cannot reflect the characteristics of the defects fully.In this paper,four typical insulation defects such as internal air gap,coil wear in slot,overlapping part fault of end semiconductor coating and anti corona layer,and surface contamination were simulated in laboratory,their partial discharge(PD)information were collected in the electromagnetic shielding chamber,and the PRPD patterns and PSA patterns were drawn respectively.Combined with the characteristics of PRPD and PSA patterns under different voltage levels,the discharge characteristics of the typical insulation defects were analyzed.The results show that considering the symmetry,discharge amplitude,spectrum envelope shape of PRPD pattern and the discharge cluster number,discharge cluster distribution position,discharge cluster shape of PSA pattern,the four typical insulation defects can be identified accurately.

关 键 词：定子绕组 绝缘缺陷 PRPD谱图 PSA谱图 

分 类 号：TM855[电气工程—高电压与绝缘技术]