高电压技术2012，Vol.38Issue(2)：342-349,8.
特高压气体绝缘组合开关设备中特快速瞬态过电压测量系统的标定
Calibration of Very Fast Transient Overvoltage Measurement System for Ultra High Voltage Gas Insulated Switchgear
摘要
Abstract
Very fast transient overvoltage（VFTO） is also generated during the operation of disconnect switch of gas insulated switchgear（GIS）.The full waveform of VFTO includes not only high frequency components up to several tens of MHz,but also low frequency components.Therefore,the measurement system must have perfect performance of transient and steady-state response.It is very important to calibrate the frequency characteristic and voltage ratio of the measurement system in order to make sure whether the measurement system can measure the full waveform of VFTO accurately.According to the principle of wave propagation along uniform transmission line,we established an apparatus generating step voltage wave;according to the output and input signals of the measurement system,we obtained a relation between the rise time of output signal and 3 dB high cutoff frequency of the measurement system when the input signal was ideal step signal,and calibrated the high frequency characteristic using the apparatus;according to the relation between low voltage arm time constant and 3 dB low cutoff frequency,we calibrated the low frequency characteristic.The 3 dB bandwidth of the measurement system was 0.003 Hz~87.5 MHz.When the measurement system was installed in actual GIS,the voltage ratio of the measurement system was determined for power frequency voltage and lightning voltage to be 6.6×105.It is revealed that the measurement system can be used to measure full waveform of VFTO generated in ultra high voltage GIS.关键词
特高压气体绝缘组合开关设备（UHVGIS）/电容分压式测量系统/标定/上升时间/频率特性/分压比/不确定度Key words
ultra high voltage gas insulated switchgear（UHV GIS）/measurement system based on capacitance voltage divider/calibration/rise time/frequency characteristic/voltage ratio/uncertainty分类
信息技术与安全科学引用本文复制引用
岳功昌,刘卫东,陈维江,关永刚,李志兵..特高压气体绝缘组合开关设备中特快速瞬态过电压测量系统的标定[J].高电压技术,2012,38(2):342-349,8.基金项目
国家重点基础研究发展计划（973计划） （）
国家电网公司科技项目（SGKJJSKF[2009]776）~~ （）
