换流站交流滤波器电容器异常分析及改善

Analysis and Improvement of AC Filter Capacitor Abnormality in Converter Station

交流滤波器作为直流输电系统的重要组成部分,其运行工况直接影响着直流输电系统功率传输。文章结合交流滤波器实际运行经验,对交流滤波器C1电容器不平衡跳闸异常进行分析,总结出交流滤波器C1电容器跳闸故障主要为电容器本体故障和层间放电故障,并对故障原因进行研究分析,提出了故障防治措施,对换流站交流滤波器的安全运行具有现实意义。

As an important part of DC transmission system,the operation conditions of AC filter directly affect the power transmission of DC transmission system.Based on the practical operation experience of the AC filter,this paperanalyzesthe unbalanced abnormal tripping ofC1 capacitor of AC filter,concludes that the C1 capacitortripfailuresof the AC filterare mainly the capacity body fault and theinterlayerdischarge fault.The causes of the faults are studied and analyzed.The prevention measures for the faults are proposed,whichhas a practical significance to the safe operation of AC filter in the converter station.