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

作     者：Suo, Chunguang Zhao, Jingjing Wang, Lifeng Xu, Zhipeng Luo, Ruikang He, Mingxing Zhang, Wenbin 

作者机构：Kunming Univ Sci & Technol Coll Sci Kunming 650504 Peoples R China Kunming Univ Sci & Technol Fac Civil Engn & Architecture Kunming 650504 Peoples R China Kunming Univ Sci & Technol Coll Mech & Elect Engn Kunming 650504 Peoples R China 

出 版 物：《ENERGIES》 (能源)

年 卷 期：2023年第16卷第8期

页      面：3372页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金："Research and development of new smart sensor technology to promote the development of green energy" [202104BN050011] "Research and development of key technologies for conformal implantation of new intelligent power sensing for power grid main equipment" [YN-KJXM20210075] 

主　　题：finite-difference time-domain method near-field propagation characteristics partial discharge signal switchgear 

摘      要：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.