压敏电阻损坏引起隔离开关误动的分析

Analysis of Disconnector Misoperations Caused by Varistor Damage

介绍了广州换流站直流场刀闸误动作的事故概况;分析了当使用压敏电阻消弧时,交流窜入直流对控制回路的影响,提出了相应的防范措施。

The accident of the disconnector misoperations in DC field at Guangzhou converter station is introduced. When AC Flows into DC Control circuit, the influence on DC control circuit that using varistor to eliminate the electric arc is analyzed. And the technical measure on preventing misoperations is proposed.