中国电机工程学报2011，Vol.31Issue(31)：18-27,10.
气体绝缘开关设备中特快速瞬态过电压的全过程测量方法
Measurement Methods of Very Fast Transient Overvoltage in Gas Insulated Switchgear With Complete Process
摘要
Abstract
In the design and operation of ultra high voltage（UHV） and extra high voltage（EHV） gas insulated switchgear（GIS）,there is a big concern on the very fast transient overvoltages（VFTO）.Experimental investigations are necessary for the full understanding of the VFTO in UHV and EHV GIS.Research was performed in this paper on VFTO measurement method.VFTO includes not only the very fast transient components,but also power frequency component and quasi-DC component（residual voltage in the floating busbar）.Also,the VFTO in different GIS positions have significant different waveforms depending on the propagation and superimposition of travelling waves in GIS.Therefore,the whole process measurement of VFTO,including two aspects of the full time processes and the site distributions in GIS,is required.Based on the port-hole capacitive sensor and an impedance converting circuit,wide frequency band measurement of VFTO was realized;the measurement systems with frequency band of 0.003 Hz~100 MHz and recording time of 200 ms were developed.Synchronous measurement of VFTO in different sites of GIS was performed using several such measurement systems simultaneously;and the synchronous trigging was realized by using the electromagnetic radiation signal generated during the switching operation of the GIS disconnector.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/阻抗匹配/阻抗变换Key words
ultra high voltage（UHV）/gas insulated switchgear（GIS）/very fast transient overvoltages（VFTO）/capacitive sensor/impedance match/impedance converting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,王浩..气体绝缘开关设备中特快速瞬态过电压的全过程测量方法[J].中国电机工程学报,2011,31(31):18-27,10.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)~~ （）
