DC filter reactor is a key equipment in converter station,and its insulation configuration is crucial for the stable operation.Once the insulation flashover occurs to the ground,it may cause power supply faults or even DC line blocking issues.The research for insulation level analysis and configuration method of filter reactors in DC converter stations can provide early warning,eliminate insulation hazards,and improve the stability of line operation.Aiming at the actual cases of converter station,the analysis method for insulation margin of filter reactor in converter station is studied,and the simulation calculations are carried out.The overvoltage levels of key risk points are obtained through analysis,and are compared and verified with insulation levels,so the practical engineering treatment plans under different safety margins are proposed.The result analysis suggests that when the insulation margin at key risk points of DC filter reactor insulation in conversion station which is in operation is less than 50%,special attention should be paid and control measures should be taken to ensure the safe operation.
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