The large number of harmonic is generated and reactive power is consumedduring operation of the converter equipment of DC system

therefore

multiple sets of AC filters need to be configured in the converter station so to realize filtering and reactive power compensation. The frequent adjustment of DC transmission power keeps multiple out of operation of AC filter and causes multiple occurrence of capacitor fault. In this paper

the structure of the capacitor is simply introduced and

with combination of the operation rule of AC filter of converter

summarizes the operation and maintenance analysis experience and the fault treatment method of the AC filter capacitor

which has practical significance for the safe operation of theconverterstation.