摘要
变电站直流接地故障频发,易导致设备损坏和负荷分配不均等问题,且拉路导致的设备停运无法满足设备持续供电的要求。针对这一问题,提出了一种并联钳位二极管于直流母线的应急供电方案。经试验验证,该方案可以大幅缩短线路无保护运行的时间,减小交流分量入侵的危害,从而确保电力系统的安全可靠运行。
Frequent DC grounding faults in substations are prone to causing problems such as equipment damage and uneven load distribution.Moreover,the equipment shutdown resulting from load shedding fails to meet the requirement of continuous power supply.To address this issue,an emergency power supply scheme of paralleling clamping diodes on the DC bus is proposed.This scheme can significantly reduce the time of unprotected line operation and mitigate the harm caused by AC component intrusion,thus ensuring the safe and reliable operation of the power system.
作者
李登
杜勇
周兴操
张艺耀
LI Deng;DU Yong;ZHOU Xingcao;ZHANG Yiyao(Pujiang County Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Pujiang 322211,Zhejiang Province,China)
出处
《电力与能源》
2025年第2期202-204,226,共4页
Power & Energy
