对接地网腐蚀后性能的仿真研究

摘要

为了分析接地网腐蚀后的性能,采用场路结合的算法,建立了一种接地网不等电位模型并进行仿真计算.利用节点电压方程和导体之间的互阻关系,形成ATP-EMTP仿真电路.通过对接地网导体腐蚀变细,电流注入点附近导体腐蚀断线和接地网边沿边角处导体腐蚀断线等情况下地表电位分布的仿真计算可以看出,接地网电流注入点附近及边沿边角处导体腐蚀断线会造成接地网内部巨大的电位差.研究表明,接地网应重点加强电流注入点附近及边缘边角处的抗腐蚀性能.%A grounding system with unequal-potential model is built and simulated using field road combination algorithm to analyze the capability of the corrosion grounding grids. A model for computation of equivalent simulation grounding system ATP-EMTP is established. The distribution of the earth's surface potential is computed in the case of distributing conductor corrosion and thinner. It shows that the entrance of electric current and the grounding system border's conductor break off can result in a huge potential difference in the grounding system. The research indicates that the corrosion grounding grid should reinforce its borders' capability in the entrance of electric current and anti corrosion.