一种提升直流分压器保护间隙耐压水平的新方法  

A new way of enhancing the voltage withstand level of DC voltage divider protection gap

作　　者：宋海龙 SONG Hailong(Maintenance Company of State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan Ningxia 750011,China)

机构地区：[1]国网宁夏电力有限公司检修公司,宁夏银川750011

出　　处：《宁夏电力》2018年第1期38-42,共5页Ningxia Electric Power

摘　　要：对特高压换流站由于直流场遭受直击雷而导致双极闭锁的问题,采用一种提升直流分压器保护间隙耐压水平的新方法,避免了由于直流场遭受直击雷而导致双极闭锁的严重隐患。应用结果表明,直流分压器过电压保护间隙回路串接压敏电阻对其耐压水平有着显著提升。For the problem of DC bipolar block due to lightning strike in the DC field of UHYDC converter station,a new way of enhancing the voltage withstand level of DC voltage divider protection gap is adopted.The serious hidden trouble of bipolar block is avoided due to lightning strike.The results show that piezo-resistor in series with overvoltage protective gap circuit of DC voltage divider significantly improved the voltage withstand level.

关 键 词：直流分压器 保护间隙 压敏电阻 雷电冲击 耐压水平 

分 类 号：TM862[电气工程—高电压与绝缘技术]