基于磁场分布的接地网诊断研究

Grounding Grid Fault Diagnosis Based on Magnetic Field Distribution

为了有效的解决电网络法中方程数过少以及电磁感应法无法准确的计算的问题,提出一种基于电磁感应原理的电网络法,为准确的计算接地网各段导体的电阻值,提供了一种简单的办法。通过施加直流电,利用各段导体产生的静磁场,求出导体中流过的电流的大小,接着通过基尔霍夫电压定律,建立接地网腐蚀诊断方程。仿真表明,该方法能有效的检测接地网的腐蚀情况。

In order to effectively solve the problem that the number of equations in the electrical network method is too few and the electromagnetic induction method can not be accurately calculated,a kind of e-lectrical network method based on the principle of electromagnetic induction is proposed,which provides a simple method for accurately calculating the resistance value of the conductor in each section of groun-ding network.By applying direct current and using the static magnetic field generated by each section of conductors,the current flowing through the conductor can be calculated,and then the corrosion diagnosis equation of grounding grid can be established by using Kirchhoff's voltage law.The simulation results show that this method can effectively detect the corrosion of grounding grid.