文章精选 I 四网孔接地网断点磁耦合谐振式检测方法研究

Research on Magnetically Coupled Resonant Detection Method for Breakpoint of Four Mesh Grounding Grid

Weihua Chen; Shuai Wang; Xiaoheng Yan; Zhiquan Ye

School of Liaoning Technical University (Huludao), Huludao, Liaoning, China

W. Chen, S. Wang, X. Yan and Z. Ye, "Research on Magnetically Coupled Resonant Detection Method for Breakpoint of Four Mesh Grounding Grid," in CES Transactions on Electrical Machines and Systems, vol. 7, no. 2, pp. 218-228, June 2023, doi: 10.30941/CESTEMS.2023.00019.

摘 要

磁耦合谐振技术是解决电力接地网断点定位的新方法之一，目前该技术只能进行接地网单网孔断点检测，本文提出一种四网孔接地网断点磁耦合谐振式检测方法。首先，建立边缘支路和中间支路两类断点的四网孔等效电路模型；通过分析模型中等效电容、等效电阻得到系统的输入阻抗和相角，采用HFSS软件对接地网故障磁耦合谐振物理过程进行求解，研究不同支路、不同位置、不同腐蚀程度的四网孔磁场强度、相频特性曲线，并搭建实验系统验证可行性。结果表明，在接地网埋深0.5m，输入频率1~15MHz条件下，等效电容与畸变频率之间成反比关系，相角与接地网腐蚀程度呈正相关，信号畸变频率可定位的误差为5%，本文为磁耦合谐振式接地网检测技术向实用性迈进提供思路。

Abstract

Magnetically coupled resonant technology is a novel method for solving the breakpoint locating of power grounding grid. But the method can only detect breakpoints of a single mesh grounding grid at present. In this paper, a magnetically coupled resonant detection method for four-hole grounding grid breakpoint is proposed. Firstly, the equivalent circuit model of the four mesh grounding grid with two types of breakpoints, namely edge branch and intermediate branch, is established. The input impedance and phase angle of the system are obtained by analyzing the equivalent capacitance and equivalent resistance in the model. Secondly, the magnetically coupled resonant physical process of grounding grid faults is solved via HFSS software. The magnetic field intensity and phase frequency characteristic curves of four mesh holes with different branches and positions of breakpoints and different corrosion degrees are studied, and an experimental system is built to verify the feasibility. The results show that under the condition of grounding grid buried depth of 0.5 m and input frequency of 1∼15MHz, and there is an inverse relationship between equivalent capacitance and distortion frequency, the phase angle is positively correlated with the degree of corrosion of grounding grid, and the error of signal distortion frequency can be positioned at 5%. This paper provides some ideas for the application of magnetic coupling grounding grid detection technology.

作者信息

Weihua Chenreceived his B.Sc. degree, M.Sc. degree and Ph. D. degree all from Liaoning Technical University in 2002, 2006 and 2016, respectively. He is currently an associate professor at Liaoning Technical University. His main research interests include the radio energy transmission technology and research on key technologies of mine electromechanical equipment.

Shuai Wangreceived his B. Sc. Degree from Liaoning Technical University in 2020.He is currently a M.Sc. candidate at Liaoning Technical University. His main research interest includes radio energy transmission technology and electromagnetic coupling.

Xiaoheng Yanreceived her B.Sc. Degree, M. Sc. degree and Ph.D. degree all from Liaoning Technical University in 2005, 2008, and 2016, respectively. She is currently an associate professor at Liaoning Technical University. Her main research interests include radio energy transmission and electromagnetic detection and imaging.

Zhiquan Yereceived his B. Sc. Degree from Tianjin University of Technology in 2020. He is currently a M.Sc. candidate at Liaoning Technical University. His main research interest includes radio energy transmission technology and electromagnetic coupling.

《中国电工技术学会电机与系统学报（英文）》(CES TEMS)是中国电工技术学会和中国科学院电工研究所共同主办、IEEE PELS学会技术支持的英文学术期刊。期刊发表国内外有关高性能电机系统、电机驱动、电力电子、可再生能源系统、电气化交通等研发及应用领域中原创、前沿学术论文。中国工程院院士马伟明担任主编，IEEE的执委Don Tan博士为国际主编。目前已被Scopus、 Inspec、Google scholar、IEEE Xplore、中国科学引文数据库(CSCD) 核心版、DOAJ、CSTPCD、知网、万方、维普等数据库收录。

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