穗东换流站断路器接触器频发故障原因及改进措施  

The Frequent Failure Cause and Improvement of Disconnector Contactor at Suidong Converter Station

作　　者：宋述波[1] 严进军[1] 邓光武[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》2012年第6期34-36,共3页Southern Power System Technology

摘　　要：结合南方电网穗东换流站500 kV隔离开关和接地断路器断路器接触器频发故障的实例,通过波形分析,指出其损坏的原因在于断路器控制电缆屏蔽层存在设计缺陷,不能有效降低外界的电磁干扰。提出了对控制电缆屏蔽层进行改造措施,即将其通过专用铜排接地。实验显示。Taking the frequent failure of disconnector contactor at Suidong Converter Station in China Southern Power Grid as an example, and through waveform analysis, this paper points out that the damage of contactor is due to such a design defect of the control cable shield that makes it unable to effectively reduce the outside electromagnetic interference. An improvement measure of grounding it through independent copper bars is proposed for the control cable shield, and experiments show that its overshoot current can be restricted effectively with the measure.

关 键 词：断路器 接触器 控制电缆 屏蔽层 电磁干扰 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM561