接地网网内电位差的均衡优化  

Equilibrium Optimization of Potential Differences Within Grounding Mesh

作　　者：常湧[1] 王明磊[1] 许崇武[1] 刘宏新[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2008年第22期98-102,共5页Power System Technology

摘　　要：接地网电位均衡性对接地网的稳定运行具有重要的意义。最大接触电压和网格电压的计算结果显示出采用按指数规律布置接地导体对降低接触电压和改善电位均衡性具有显著作用。将接地网四角做成半径为D/2(D为均压带间距)圆弧的方法和按指数规律布置接地网的方法结合起来,可以显著降低边缘的电位梯度,更近一步降低地表电位差。文章还阐述了保证接地网电位均衡性的措施,并指出接地网防腐对维持接地网电位均衡性具有重要作用。The equilibrium of potentials within grounding network is significant for stable operation of the network. The calculation results of maximum touch voltages and mesh potentials show that it brings evident effect for reducing touch voltage and improving potential equilibrium to arrange grounding conductors according to exponential law. Combining the two approaches, i.e., making the four corners of grounding network circular arc whose radius is one half of the interval among equalizing belts and arranging grounding network according to exponential law, the electric potential gradient at the edge can be obviously reduced and the ground surface potential difference can be further reduced. The authors expound the measures to ensure the potential equilibrium of grounding network and point out that the anticorrosion of grounding network is very important to the maintenance of potential equilibrium of grounding network.

关 键 词：接地网 电位均衡 均压措施 腐蚀防护 

分 类 号：TM712[电气工程—电力系统及自动化]