500kV变电站CTV 3U_0频繁告警及主变噪声异常分析

Analysis on Frequent Alarming and Main Transformer Abnormal Noise of CTV 3U_0 for 500 kV Substations

高压直流输电系统单极大地运行时接地极电流对交流电网会产生一定影响,其中对中性点直接接地变压器的影响最大,接地极电流对电网影响的范围和程度也随接地极电流加大而增大。分析了特高压直流单极大地运行时对交流电网及中性点直接接地变压器的影响,总结了目前一些减小高压直流输电系统接地极电流对变压器偏磁影响的主要措施。

Monopolar HVDC ground electrode current running will have some impact on the grid,and it will have a bigger impact on neutral grounding transformer.This paper analyzes the impact of HVDC monopole operation upon AC electric network equipment including transformer.Also it sums up the current measures of reduce HVDC ground electrode current magnetic bias effect on the transformer.