Operation & Maintenance Analysis and Fault Handling of AC Filter Capacitor in Converter Station

The operation of DC system converter will generate a lot of harmonics and consume a lot of reactive power. Therefore, multiple sets of AC filters need to be configured in the converter station to realize filtering and reactive power compensation. While DC transmission power is adjustment frequently, so that the AC filter is repeatedly thrown back, causing frequent capacitor failures. In this paper, the capacitor structure is briefly introduced, and the operating rules of the AC filter of the converter station are mainly combined. The experience of operation, maintenance and fault handling method of AC filter capacitor are summarized, which has practical significance for the safe operation of the converter station.