变电站直流系统直流互窜事件分析  

Analysis of DC Inter-channeling Event in DC System of Substation

作　　者：全杰雄 温才权[1] QUAN Jiexiong;WEN Caiquan(Wuzhou Bureau of China Southern Power Grid EHV Transmission Company,Wuzhou 543002,China)

机构地区：[1]中国南方电网超高压输电公司梧州局,广西梧州543002

出　　处：《电工技术》2020年第22期98-100,共3页Electric Engineering

基　　金：提高二次系统抗干扰性能关键技术研究(科技编码:CGYKJXM20180555)。

摘　　要：直流系统作为厂站重要的电源系统,其安全稳定运行是保证继电保护、安全自动装置正确动作的前提和基础。发生直流互窜,会严重影响直流系统的安全稳定运行,必须尽快解决。而由于绝缘监测装置本身局限性、直流互窜隐蔽性,往往需要大量时间进行排查。文章以一起变电站直流系统由于改扩建工程施工人员误接线导致直流互联事件为例,分析故障原因,提出5项有针对性的解决措施,以提高现场故障处理的效率和安全性。DC system is an important power supply system in power plant.Safe and stable operation are the premise and foundation to ensure the relay protection and safe automatic device to operate correctly.When the DC inter-channeling occurs,it will seriously affect the safety and stability of the DC system and must be treated as soon as possible.Because of the limitation of the insulation monitoring device and the concealment of DC inter-channeling,it often needs a lot of time to check.In this paper,a DC interconnection accident caused by incorrect connection of construction staff in a substation DC system was taken as an example,the fault analysis was carried out in detail.Five targeted solutions were proposed to improve the efficiency and safety of on-site fault treatment.

关 键 词：直流系统 绝缘监测 直流互窜 寄生回路 

分 类 号：TM862[电气工程—高电压与绝缘技术]