直流叠加冲击电压时GIS母线闪络特性  

Flashover Characteristics of GIS Busbar Under DC Superimposed Impulse Voltage

作　　者：操松元 张贵富 傅中 程登峰 马径坦 叶三排 CAO Songyuan;ZHANG Guifu;FU Zhong;CHENG Dengfeng;MA Jingtan;YE Sanpai(State Grid Anhui Electric Power Co.,Ltd.,Hefei 230009,China;State Grid Anhui Electric Power Co.,Ltd.,Ultra High Voltage Company,Hefei 230000,China;State Grid Anhui Electric Power Co.,Ltd.,Electric Power Research Institute,Hefei 230022,China;State Grid Jiangsu Electric Power Co.,Ltd.,Electric Power Research Institute,Nanjing 211103,China;State Grid Pinggao Group Co.,Ltd.,Henan Pingdingshan 467001,China)

机构地区：[1]国网安徽省电力有限公司,合肥230009 [2]国网安徽省电力有限公司超高压分公司,合肥230000 [3]国网安徽省电力有限公司电力科学研究院,合肥230022 [4]国网江苏省电力有限公司电力科学研究院,南京211103 [5]国网平高集团有限公司,河南平顶山467001

出　　处：《高压电器》2023年第6期208-214,共7页High Voltage Apparatus

基　　金：国家电网公司科技项目(SGSDJS00TGJS1900012)。

摘　　要：GIS母线残余电压和合闸的操作冲击电压共同作用可能会造成GIS母线发生闪络,开展GIS母线有直流电压情况下叠加冲击电压试验,是研究提高GIS母线绝缘水平的必要方法。文中通过搭建直流叠加冲击电压试验回路,研制1100 kV串联550 kV GIS母线试验平台,开展直流叠加雷电或操作冲击电压试验,结果表明:单独±2400 kV雷电冲击电压或单独±1800 kV操作冲击电压作用时,母线均未发生闪络;负极性直流叠加负极性冲击电压作用时,550 kV GIS母线段多次发生闪络,负—负极性叠加比单独冲击电压作用时闪络电压更低,负—负极性叠加的闪络电压比其他极性组合叠加的闪络电压更低,其中-450 kV直流叠加-2400 kV雷电冲击电压时,与单独-2400 kV雷电冲击电压作用时比较,叠加的雷电冲击闪络电压幅值大约下降28.5%。The combination of the residual voltage and the switching impulse voltage in the closed operation of GIS busbar may cause flashover of GIS busbar.The development of the superimposed impulse voltage test,when the GIS busbar has a DC voltage,is a necessary method to study the improvement of the insulation level of the GIS busbar.In this paper,the 1100 kV series 550 kV GIS busbar test platform by setting up a DC superimposed impulse voltage test circuit is developed and the DC superimposed lightning or operating impulse voltage test is performed.The result shows that,in case of individual±2400 kV lightning impulse voltage or individual±1800 kV switching impulse voltage,the busbar does not have flashover.And in case of negative polarity DC superimposed negative polarity impulse voltage,the 550 kV GIS busbar has multiple flashover.The flashover voltage in negative-negative polarity superimposition is lower than that of individual impulse voltage,and the flashover voltage of negative-negative polarity superimposition is lower than that is superimposed by other polarity combination,in which,in case of 450 kV DC is superimposed on the-2400 kV lightning impulse voltage and compared with the individual-2400 kV lightning impulse voltage,the amplitude of the superimposed lightning impulse flashover voltage is reduced by about 28.5%.

关 键 词：GIS母线 绝缘水平 直流叠加雷电或操作冲击电压 闪络 

分 类 号：TM595[电气工程—电器]