Method for diagnosing direct current partial discharging insulation state of converter transformer and measurement system

The present invention belongs to the technical field of power transmission equipment, particularly to a DC converter transformers insulated partial discharge diagnosis and measurement systems. By measuring the partial discharge pulse signals of different transmission paths according to the present invention, real-time, comparing distributed partial discharge pulse signal and the statistical characteristics of spatial clustering frequency identification insulated web segment, effectively and accurately detect partial discharge current converter transformer wherein an insulating state information, comprehensive evaluation and the insulation defect type trend partial discharge.