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

Chunguang Suo, Jingjing Zhao, Lifeng Wang (), Zhipeng Xu, Ruikang Luo, Mingxing He and Wenbin Zhang
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Chunguang Suo: College of Science, Kunming University of Science and Technology, Kunming 650504, China
Jingjing Zhao: College of Science, Kunming University of Science and Technology, Kunming 650504, China
Lifeng Wang: Faculty of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming 650504, China
Zhipeng Xu: College of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, China
Ruikang Luo: College of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, China
Mingxing He: College of Science, Kunming University of Science and Technology, Kunming 650504, China
Wenbin Zhang: College of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, China

Energies, 2023, vol. 16, issue 8, 1-19

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

Keywords: finite-difference time-domain method; near-field; propagation characteristics; partial discharge signal; switchgear (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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