Dual-end measured overhead insulating wire local discharge positioning system and method

The invention relates to an overhead insulating wire local discharge positioning system and method which are characterized in that dual-end time synchronization is carried out by pulse injection. The device mainly comprises a multifunctional sensor unit, an emission unit and a reflection unit. An annular coil and a copper foil electrode attenuator structure are adopted by a multifunctional sensor. The emission unit injects pulses to an overhead insulating wire through the multifunctional sensor. A signal is transmitted to the reflection unit and triggers the reflection unit to injects pulses to the overhead insulating wire through the multifunctional sensor. The signal is reflected back to an emission end. According to the invention, practice calibration is carried out on a dual-end apparatus by means of signal injection, and the position of a local discharge source can be effectively measured, so that the safety and the reliability of an overhead insulating wire power distribution line are further improved.