特高压气体绝缘开关设备中特快速瞬态过电压测量用电容传感器的标定  

Calibration of the Capacitive Sensor Used in the Very Fast Transient Overvoltage Measurement of Ultra High Voltage Gas Insulated Switchgear

作　　者：丁卫东[1] 李峰[1] 张乔根[1] 陈国强[2] 刘洪涛[2] 岳功昌[3] 张博[4] 

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),陕西省西安市710049 [2]国家电网公司,北京市西城区100031 [3]清华大学,北京市海淀区100084 [4]华北电力大学,北京市昌平区102206

出　　处：《中国电机工程学报》2011年第31期56-65,共10页Proceedings of the CSEE

基　　金：基金项目:国家重点基础研究发展计划项目(973项目)(2011CB209405);国家电网公司科技项目(SGKJJSKF[2009]776)~~

摘　　要：为保证特高压气体绝缘开关设备(gas insulatedswitchgear,GIS)中特快速瞬态过电压(very fast transientovervoltage,VFTO)测量用手孔式电容传感器的准确性,必须对其进行标定。研制了用于电容传感器的标定系统,它由3种不同幅值及波形的脉冲源及相应测量系统组成。其中:低电压陡脉冲源用于校验电容传感器的高频特性;高电压陡脉冲源用于校验传感器在高压下的稳定性;低电压长波尾电源用于校验传感器的低频特性。水电阻分压器及金属膜电阻分压器用于测量3种脉冲源的输出波形,在标定电容分压器前,对电阻分压器的频率特性及线性度特性进行了试验。电容传感器的标定试验结果表明,华北电力大学和清华大学研制的电容传感器均具有良好的频率特性、线性度和稳定性,可以满足特高压GIS设备VFTO测量工作的需要。It is necessary to calibrate the hand hole capacitive sensors used for very fast transient overvoltage（VFTO） measurement in ultra high voltage（UHV） gas insulated switchgear（GIS） to ensure its accuracy.The calibration system developed in this paper consists of three impulse generators and corresponding measurement components.The system adopts a low voltage steep pulse generator to verify the sensor＇s high frequency characteristics,a high voltage steep pulse generator to verify the stability of the sensor under high voltage,and a long tail impulse generator to verify the sensor＇s low frequency characteristics.A water resistance divider and a metal film resistance divider were developed to measure the waveforms generated by the three impulse generators.The frequency characteristics and linearities of these resistance dividers used for calibration were verified.The calibration results show that the two types of capacitive sensors developed by North China Electric Power University and Tsinghai University function well in frequency characteristics,linearity and stability;and could meet the requirements of VFTO measurement in UHV GIS.

关 键 词：特高压 气体绝缘开关设备 特快速瞬态过电压 电容传感器 标定 电阻分压器 陡脉冲源 

分 类 号：TM83[电气工程—高电压与绝缘技术]