换流站±800kV直流穿墙套管回路电阻异常

Analysis on Abnormal Circuit Resistance of ±800 kV DC Wall Bushing in Converter Station

介绍某换流站高端阀厅±800 k V直流穿墙套管预防性试验时发现套管回路电阻异常,这将会给设备正常运行带来风险。本文通过介绍设备情况、试验数据、返厂解体情况,初步分析得出了安装和装配过程不严谨、运行过程中受到机械外力、长时间大负荷运行产生氧化层等是导致回路电阻异常的三种主要原因,从而提出了后续的运行和维护措施。

Found abnormal circuit resistance of ±800 kV DC wall bushing？ in carrying out the preventive test of a converter station. It will pose a risk to equipment operate normally. This paper concludes assembly process is not rigorous, mechanical force and oxide layer of prolonged high load operation cause the abnormal circuit resistance of the DC wall bushing during describes the equipment, the test data and the disintegration situation of factory. Then put forward the follow-up？ measures of operation and maintenance.