基于虚拟仪器的GIS局部放电声电联合检测系统  

Combined Ultrasonic and Electrical Detection System for GIS Partial Discharge Based on Virtual Instrument

作　　者：张天辰[1] 胡岳[1] 李清[2] 黄兴泉[2] 盛戈皞[1] 江秀臣[1] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]河南电力试验研究院,郑州450000

出　　处：《高压电器》2012年第11期43-49,共7页High Voltage Apparatus

基　　金：上海市科委项目资助(10dz203000)~~

摘　　要：笔者设计了一套基于虚拟仪器的GIS局部放电声电联合检测系统,通过不同速率的数据采集模块对GIS局部放电过程中所产生的超高频、高频电流以及超声波信号进行多通道同步联合检测。系统基于LabVIEW虚拟仪器平台开发,可连续捕捉与采集存储局部放电脉冲波形信号、实时计算放电脉冲相位。利用采集的局放信号进行时频分析和模糊聚类实现了多源局放的有效分离和类型判断,同时基于多路局部放电超高频信号与超声波信号本身或两者之间的时差可实现局部放电源的定位。该系统已在多个220 kV及500 kV GIS变电站的局部放电现场检测中得以应用,检测结果验证了系统的性能。A GIS partial discharge （PD） designed based on virtual instrument. detection system with uhrasonic and electrical combination Simultaneous multi-channel detections are applied to is the ultra-high-frequency signals, high-frequency current signals and ultrasonic signals generated by GIS partial discharges via data acquisition modules with different sampling rates. The detection system based on virtual instrument platform can continuously capture and store PD pulse signals, and calculate PD pulse phase information. The separation of muhi-source PD and distinction of PD type are achieved by using time-frequency analysis and uhrasonic signals or their fuzzy time clustering. PD source location is carried out by multiple UHF signals and difference. Field detections are conducted with the proposed system in several 220 kV and 500 kV GIS substations, and the results verify the effectiveness of the system.

关 键 词：局部放电 声电联合检测 GIS 虚拟仪器 时频分析 模糊聚类 

分 类 号：TM855[电气工程—高电压与绝缘技术]