基于散射原理的电力系统接地网成像方法研究

Zhang Laifu, X. Yudong, Yu Hua, Yang Hong, Wang Qian, Zhang Yu
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摘要

针对电力系统接地网的腐蚀和缺陷检测问题,提出了一种脉冲电磁逆散射智能成像方法。首先,根据接地网设备与周围土壤介质的电参数差异,实现变电站设备接地系统的电参数幅值图像重建,然后通过电参数异常来反映接地网的故障或缺陷。因此,本文首先分析了基于散射原理的接地网智能成像检测的基本理论,然后设计开发了接地网状态智能检测系统,并进行了接地网样本的数值实验和测试实验。最后,结合窄脉冲发射、电磁探测、多重覆盖探测等技术,根据接地网浅层探测和成像分辨率的要求,研究了接地网的智能探测方法。
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Research on Imaging Method of Power System Grounding Grid Based on Scattering Principle
Aiming at the problems of corrosion and defect detection of grounding grid in power system, an intelligent imaging method of pulse electromagnetic inverse scattering is proposed in this paper. Firstly, based on the difference of electrical parameters between grounding grid equipment and surrounding soil medium, the electrical parameter amplitude image reconstruction of substation equipment grounding system is realized, and then the fault or defect of grounding grid is reflected by electrical parameter anomaly. Therefore, this paper first analyzes the basic theory of intelligent imaging detection of grounding grid based on scattering principle, then designs and develops the intelligent detection system of grounding grid state, and carries out the numerical experiment and the test experiment of grounding grid samples. Finally, combined with narrow pulse emission, electromagnetic detection, multiple coverage detection and other technologies, according to the requirements of shallow detection and imaging resolution of grounding grid, the intelligent detection method of grounding grid is studied.
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