Method for on-line monitoring and positioning of partial discharge of gas insulation combined electrical apparatus

The invention discloses a method for on-line monitoring and positioning of partial discharge of a gas insulation combined electrical apparatus, which belongs to the technical field of insulation monitoring of electrical equipment. The gas insulation combined electrical apparatus mainly comprises a sensor antenna, an intelligent select switch, a high-speed digital collector, a processor, a control module and the like; and in the method, data fitting is performed on partial discharge signals received by the sensor antenna through a wave head fitting algorithm, and a simple approximate function is solved to reflect the overall change trend of a primary function, so a source point of the partial discharge can be accurately determined. The method can effectively detect the partial discharge of a GIS, automatically monitor the partial discharge inside the GIS on line, and improve the anti-jamming capability of a detection system.