特高压气体绝缘组合开关设备现场冲击耐压试验及局部放电测量  

Field Impulse Withstand Test and Partial Discharge Detection for Ultra High Voltage Gas Insulated Switchgear Equipment

作　　者：李军浩[1] 车斌[1] 韩旭涛 张亮[1] 康钧 李渊 

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]青海电力公司电力科学研究院,西宁810000

出　　处：《高电压技术》2015年第11期3659-3665,共7页High Voltage Engineering

基　　金：国家高技术研究发展计划(863计划)(2011AA05A121);国家自然科学基金(51207124)~~

摘　　要：气体绝缘组合开关(GIS)采取现场组装的形式,现场试验对GIS的安全运行具有重要意义。为此,论述了国内外首次进行的1 100 kV特高压(UHV)GIS现场振荡型雷电冲击耐压试验和同时进行的特高频(UHF)局部放电测量试验。对特高压GIS现场冲击耐压试验的发生器形式、参数及现场试验流程进行了介绍,对比了内置式和外置式2种特高频局部放电测量方式得到的测量结果的差异。结果表明,外置传感器受到的干扰较大而内置传感器则不受外部干扰。适当减小限流电阻可提高电压的产生效率。此外,模块化冲击电压发生器配合振荡型冲击电压波形可以实现较高的产生效率和现场组装速度。利用内置式特高频传感器可以有效屏蔽发生器球隙放电的干扰,实现现场雷电冲击耐压试验时GIS内部局部放电的检测。Gas insulated switchgear（GIS） takes the form of on-site assembly, so the field test is of important significance for the safe operation of GIS. Therefore, we described the first field oscillating impulse withstand test for 1 100 kV ul- tra-high voltage（UHV） GIS equipment and the ultra-high frequency（UHF） partial discharge detection which was simultaneously carried out, and introduced the structure and parameters of impulse generator and test procedures of UHV GIS field oscillating impulse withstand test. Then we compared the measurement results obtained by two UHF partial discharge measurement methods namely built-in and external type. The results show that there is a great interference on outer sensor but little interference on inner sensor. Reducing the current limiting resistance can increase the voltage gen- eration efficiency. Moreover, the modular impulse voltage generator combined with oscillating impulse voltage waveform has higher generated efficiency and can be assembled quickly in field. The inner UHF sensor can effectively shield the interference from sphere-gap disruptive discharge of generator and it can realize the detection of partial discharge in GIS under field lightning impulse voltage.

关 键 词：特高压 GIS 现场耐压试验 振荡型冲击电压 局部放电 特高频 

分 类 号：TM595[电气工程—电器]