This Paper introduces briefly the disposition principle of Filter Capacitor at Converter Station of TSQ

and analyzes statistically the fault numbers and types of such capacitor at above station in recent years.The specialized factory is assigned to disassemble and analyze the faulted DC filter capacitor.According to the actual situation of the dissembled fault capacitor

the author finds out several reasons leading to damage of such capacitor

conducts analysis further

proposes feasible improvement suggestion in combination with the actual operation status of the Converter Station of TSQ

which has important guidance significance to the safe and stable operation of DC filter capacitor.