摘要
本文针对电力系统接地网腐蚀、断裂等故障的定位和定量评估问题,提出一种接地网脉冲电磁逆散射成像新方法,利用接地网及周围土壤介质电参数的综合差异性,实现变电设备接地网电性参数幅值图像重建,通过电参数异常反映接地网电参数及结构特性。本文分析了基于散射原理的接地网智能成像检测基本理论,设计并研制了接地网状态智能检测系统,进行了数值实验和接地网样本的测试实验。本文方法是窄脉冲发射、电磁检测、多次覆盖观测技术的结合,适合接地网浅层探测,成像分辨率高,它为接地网提供了一种新的检测方法。
This paper proposes an electrical parameter imaging method for grounding grid by pulsed electromagnetic inverse scattering,that aims at accurate positioning and quantitative evaluation of corrosion and breakpoint for power system grounding grid. Based on the comprehensive electrical parameter diversity of grounding grid and soil,the new method intends to realize the image reconstruction of electrical parameter amplitude for grounding grid,the abnormity can reflect the electrical parameter and structure of grounding grid,and the basic theory of intelligent imaging detection for grounding grid based on scattering is analyzed in this paper. Intelligent imaging detection system for grounding grid is designed and developed. The numerical tests are carried out and the system has been tested.The combination of narrow pulse,inverse scattering imaging and multiple coverage observation can realize image reconstruction of electrical parameter,and at the meanwhile,it is appropriate for imaging characteristics for the shallow-depth and the demand of high-resolution of grounding grid,and that will provide a new detection method for grounding grid.
出处
《电工电能新技术》
CSCD
北大核心
2018年第2期76-82,共7页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51407175)
国家电网公司科技项目(SGSXDKY-PJKJ2015-004)
关键词
接地网
智能成像
逆散射
电参数
grounding grid
intelligent imaging
inverse scattering
electrical parameter
