resonance±11.2kV直流融冰装置换流变低压侧电压互感器中性点接地问题探讨  

Discussion on Neutral Grounding of Converter Transformer on Low Voltage Side of±11.2 kV DC Deicer

作　　者：李斌[1] Li Bin

机构地区：[1]中国南方电网超高压输电公司贵阳局,贵州贵阳550000

出　　处：《电力系统装备》2021年第12期15-17,共3页Electric Power System Equipment

摘　　要：直流融冰装置在进行融冰时,可能出现换流变低压侧电压互感器熔丝熔断、电压互感器爆炸的问题。分析了该事故产生的机理及抑制措施,并提出了一种解决融冰过程中谐振问题的办法。When the DC ice melting device is melting ice,the fuse of the voltage transformer on the low-voltage side of the converter transformer may be blown and the voltage transformer may explode.The mechanism and restraining measures of the accident are analyzed,and the physical simulation results are given.A solution is proposed to solve the resonance problem in the ice melting process:the primary side coil of the low-voltage side voltage transformer of the converter transformer is changed to a neutral point non-grounding method.

关 键 词：直流融冰装置 电压互感器 中性点 谐振 

分 类 号：TM75[电气工程—电力系统及自动化]