三峡550kV GIS的雷电冲击耐受试验方法  

Test on Lighting Impulse Withstand Voltage of the Three Gorges Right Bank 550kV GIS Substation

作　　者：胡伟[1] 陈勇[1] 万启发[1] 杨鹏程[2] 曹晶[1] 霍锋[1] 

机构地区：[1]国网电力科学研究院,武汉430074 [2]清华大学电机工程与应用电子技术系,北京100084

出　　处：《高电压技术》2011年第4期883-887,共5页High Voltage Engineering

基　　金：国家电网公司科技项目(SG0920)~~

摘　　要：随着我国电网的高速发展,越来越多的新建变电站采用了GIS成套设备,在设备安装完毕后需要对其进行雷电冲击试验以检验其绝缘性能,消除设备的故障隐患。然而,由于受到设计制造等因素的限制,普通的雷电冲击发生器在大电容负载下,尤其是GIS负载下,无法产生符合试验要求的雷电冲击波形。为此结合三峡550 kV变电站GIS设备雷电冲击耐受试验,对雷电冲击发生器以及现场设备建模并进行仿真计算;根据分析结果提出了在冲击回路中安装电感,使其可以产生满足试验要求的雷电振荡冲击的方法。现场测试中成功应用该方法,取得了较好的效果,同时也为我国750、1000 kV等超特高压变电站GIS雷电冲击试验积累了相关的经验。With the rapid development of power system in China, more and more GIS are adopted in new substations. Lighting impulse withstand voltage tests are recommended after the installation of GIS in order to test the GIS insulations and reduce the risks of equipment failure. However, due to the design and manufacturer, traditional im- pulse generators cannot generate standard lighting impulse with large capacitive load such as GIS. Consequently, based on the test on GIS of the Three Gorges Right Bank 550 kV substation, models of lighting generators and GIS are established and relative simulations are carried out. The results show that adding oscillating inductor to the gen- erator is a good method to generate oscillating lighting impulse which meets the requirements of test. This method is successfully used in the tests and the results are satisfied. Valuable experience has been accumulated for the lighting impulse tests on GIS of 750 kV, 1000 kV substations in China.

关 键 词：雷电冲击 GIS 波前时间 耐受电压 现场试验 电感 

分 类 号：TM595[电气工程—电器] TM862