Dual-end positioning method for partial discharge source of power cable

The invention discloses a dual-end positioning method for a partial discharge source of a power cable. When the power cable is longer, a measurement unit is arranged at the near end of the power cable, and a triggering reflection unit is arranged at the far end of the power cable; a partial discharge signal sent by the partial discharge source firstly reaches the measurement unit at the near end, and when the triggering reflection unit receives a partial discharge pulse through a high-frequency cable transformer, the pulse signal is sent to a signal emission module for amplification, then is sent to the cable through another high-frequency cable transformer and is transmitted to the measurement end; by measurement of the difference of the arrival of time of the partial discharge pulse and the amplified partial discharge pulse, the partial discharge source is positioned; by enhancement of the reflected partial discharge pulse, the positioning precision is greatly improved, and the dual-end positioning method has a good application prospect.