摘要
为了实现在不停电,不开挖的情况下检测接地网断点及腐蚀状况,根据瞬变电磁法基本原理,通过COMSOL Multiphysics软件仿真阶跃波激励下接地网模型的瞬变电磁响应,经过Matlab软件编程计算接地网模型的视电阻率,并通过surfer软件成图得到视电阻率断面图。对于日字形接地网,通过对比接地网完好、接地网中间变细1/2、接地网中间断开、接地网左边断开几种情况下的视电阻率断面图,说明该方法用于接地网故障诊断的可行性。
To diagnose breakpoints and corrosion situation of grounding grids in the case of no power outages and digging,the paper proposes an idea based on transient electromagnetic method.It gets transient electromagnetic response of the grounding grids model driven by step waves,using COMSOL Multiphysics to simulate.It uses MATLAB programming to calculate the apparent resistivity of grounding grids model.And the profile of apparent resistivity is obtained by the mapping function of surfer.The paper takes the shape of Chinese character ri as an example,comparing the profiles of apparent resistivity measured in different conditions of the grounding grids,including in good condition,half the middle width and with left or middle breakpoints,the result verifies the correctness of the method applied in fault diagnosis of grounding grids.
出处
《实验室研究与探索》
CAS
北大核心
2017年第1期108-111,共4页
Research and Exploration In Laboratory
基金
吉林省电力科学研究院电力有限公司科技项目:地网腐蚀无损检测技术与安全状态评估方法研究
关键词
瞬变电磁法
视电阻率
接地网
故障诊断
transient electromagnetic method
apparent resistivity
grounding grid
fault diagnosis
