特高压直流输电系统接地极线路保护性能分析

Analysis of Grounding Electrode Line Protection Performance in UHVDC Transmission System

接地极线路保护是特高压直流输电系统中重要的保护之一,现场运行情况表明目前的接地极线路保护存在缺陷。介绍了接地极线路保护的配置情况,并从原理上对接地极线路保护的性能进行了分析。最后,针对目前接地极线路保护存在的问题,从保护策略和故障隔离两方面提出了相关建议。

Grounding electrode line protection is one of the most important protections of UHVDC transmission system. The field operation indicates that the present grounding electrode line protection has some defects. The protection configuration of grounding electrode line is introduced and the performance of grounding electrode line protection is analyzed theoretically. Fi- nally, the relative suggestions are proposed as viewed from protection strategy and fault isolation according to the exsiting prob- lems of the present grounding electrode line protection.