Research on Near-Field Propagation Characteristics of Partial Discharge Electromagnetic Wave Signal in Switchgear

In the authors’ previous research, a new method for partial discharge detection in switchgear based on near-field was proposed. The content of this paper is continuation research. order to realize reasonable layout magnetic field probe switchgear, simulates and analyzes influence internal structure propagation characteristics electromagnetic wave signal generated by discharge, determines installation position switchgear. Firstly, signals different media are analyzed, model established. Then, finite difference time domain method, devices simulated. simulation results show that current transformer, insulator, busbar cabinet all obviously attenuate amplitude insulator causes obvious distortion. Finally, it determined can be installed inner wall or right near bottom plate