This paper introduces the types of HVDC faults and the causes of HVDC pole blocking and analyzes the effects of HVDC pole blocking on power system stability, taking some HVDC projects for example and highlighting Gaopo-Zhaoqing HVDC project.

• 介绍了直流故障的类型和直流闭锁的原因，重点以高肇直流输电系统为例分析了直流闭锁对电力系统稳定的影响。