特高压气体绝缘开关设备中瞬态外壳电压测量装置的研制  

Development of the Measuring Device of Transient Enclosure Voltage in Ultra High Voltage Gas Insulated Switchgear

作　　者：胡榕 崔翔 陈维江[2] 张卫东 李志兵[3] 戴敏[3] 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]国家电网公司,北京市西城区100031 [3]中国电力科学研究院,北京市海淀区100192

出　　处：《中国电机工程学报》2015年第23期6235-6245,共11页Proceedings of the CSEE

基　　金：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;2011);中央高校基本科研业务费项目(12QX04)~~

摘　　要：特高压(ultra high voltage,UHV)气体绝缘开关设备(gas insulated switchgear,GIS)的瞬态外壳电压(transient enclosure voltage,TEV)具有陡波前、高幅值和宽频带等特点,可能危害到接触GIS设备的运行人员安全及GIS设备监控系统的正常运行。为此,准确测量TEV是十分必要的。该文采用电阻性阻抗分压法测量TEV,提出TEV典型波形特征和测量要求;依据测量基本要求,研制了抗强电磁干扰的TEV测量装置,并对装置进行一系列的性能试验及电磁兼容与绝缘耐压试验;建立了测量装置和测量/接地屏蔽电缆的等效电路模型,通过仿真计算和试验测试规定了这两种屏蔽电缆的长度上限;最后将测量装置应用于现场UHV GIS设备的TEV多测点全过程同步测量,结果表明TEV测量装置满足UHV的GIS设备的TEV现场测量。因此,采用文中的TEV测量装置能够获得GIS外壳不同位置的TEV波形特征及分布规律,为TEV的仿真建模提供试验数据。Transient enclosure voltage（TEV） in ultra high voltage（UHV） gas insulated switchgear（GIS） has steep rise time of waveform, high amplitude, wide frequency band and other characteristics, these may affect the safety of operating personnel touched with GIS and normal operation of GIS monitoring devices. For these reasons, it is necessary to accurately measure TEV. A method of resistive impedance divider was used to measure TEV, typical waveform characteristics of TEV and basic requirements of TEV measuring were proposed; Based on basic requirements of m e a s u r i n g, T E V m e a s u r i n g d e v i c e o f s t r o n g a n t i-electromagnetic interference was developed, a series of performance tests and electromagnetic compatibility and insulation tests were carried out on the device; Equivalent circuits of measuring device and measuring/grounding shielded cables were established, through simulation and experimental test, these maximum lengths of both shielded cables were respectively defined; Finally, the measuring device was applied to TEV multiple measuring points of a whole process simultaneous measurement in UHV GIS on site, these results show that TEV measuring device met TEV measuring on UHV GIS site. Therefore, TEV waveform characteristics and distribution of different locations on GIS enclosure can be obtained by TEV measuring device, these experimental data are provided for TEV modeling and simulation.

关 键 词：特高压 气体绝缘开关设备 瞬态外壳电压 测量装置 性能测试 建模仿真 

分 类 号：TM83[电气工程—高电压与绝缘技术]