Field application of partial discharge detection and location on 750kV reactor

In this paper, a series of problems of detecting partial discharge (PD) and locating PD sources using acoustic signal on high voltage reactor are systematically discussed. The complex circumstance of acoustic propagation in reactor and the diffraction influence on the acoustic velocity are fully considered. Based on abnormal signals detected on 750kV reactor in one substation of Shaanxi power grid and time-based distance calculation method, the PD source location was presented according to the acoustic emission (AE) associate with high frequency (HF) earthing current detection. Finally, the effectiveness of previous analysis was proved by the internal inspection.