Research on testing and feature of partial discharge interference signal for substation under complex environment

Dissociation and suppressing interference are always crucial for partial discharge live and on-line detection for substation equipment, so it is necessary to research on interference signal feature for substation in different places, in order to achieve on separating true partial discharge from interference signal. This paper proposes, which takes 110kV, 220kV and 500kV substation as research objects, a way of measuring interference signal for substation under complex environment. And this paper measuring interference signal around 20 substations by UHF and HF method, makes the statistics about time-domain, frequency-domain, amplitude distribution and so on, and then studies the relation between the position of interference signal source and signal amplitude, all of which provide a reference for dissociation and suppressing interference under complex environment.