测试方法对MOA避雷器泄漏电流特性的影响  

The Influence of Test Method on the Characteristics of MOA＇s Leakage Current

作　　者：王颂[1] 叶建铸[1] 左干清[1] 刘红太[1] 

机构地区：[1]中国南方电网超高压输电公司广州局,广州510405

出　　处：《南方电网技术》2011年第A02期22-26,共5页Southern Power System Technology

摘　　要：高压直流输电系统避雷器离线测试泄漏电流有拆连接线法和不拆连接线法。用拆连接线法，可以准确的测量避雷器的参考电压U1mA和75％U1mA下的泄漏电流；而用不拆连接线法，可以节省大量的时间和避免重复劳动。这两种方法是否等效既是运行部门关心的，也是避雷器离线测试人员需要回答的问题。采用上述两种测试方法对贵州一广东土500kV直流输电系统的换流阀保护避雷器进行了模拟测试，分析在多情况下避雷器泄漏电流特性，发现其测量结果基本一致；然后对两种方法的可行性和差异性进行了讨论。There are two off-line test methods for the leakage current of MOAs in HVDC systems, namely the demolition connection method and the non-demolition connection method. The former has an advantage to detect accurately the MOA＇s reference voltages of U1mA and 75%U1mAwhile the latter can do the detection very fast and directly. But there is a question, ＂if the results of the two methods are equivalent＂, that facing operation departments and testers. With the two methods this paper does a field test on the lightning arrester of convertor in Guizhou-Guangdong ＋500 kV HVDC transmission system, and analyzes the leak current characteristics of the arrester in various situations, founding that the results with these methods are basically in agreement, and then discusses the feasibility and diversity of the two methods.

关 键 词：高压直流输电 避雷器 泄漏电流 拆连接线法 不拆连接线法 

分 类 号：TM86[电气工程—高电压与绝缘技术]