高低压电网保护接地网互联影响的分析  

Effect of interconnection of protective earthing networks on high-voltage and low-voltage distribution systems

作　　者：牟龙华[1] 李国欣[2] 孟庆海[2] 

机构地区：[1]同济大学电气工程系,上海200092 [2]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《煤炭学报》2004年第2期238-242,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50077022)

摘　　要：根据保护接地网互联特点,通过建立等效电路模型,提出了保护接地网电流和电压分布的数值计算模型,给出了仿真计算结果.结果表明,高压侧发生接地故障时将引起低压侧接地极对地电压的升高,从而影响低压电网的安全性能.Based on the interconnection characteristic of protective earthing networks, the model of equivalent circuit is established, and a numerical model calculating the current and voltage distribution is proposed.The results of simulation are also presented.The results show that a ground fault in high-voltage part will bring on the increase of voltage drop of ground electrode in low-voltage part, and influence the safety performance of low-voltage distribution system.

关 键 词：保护接地 配电系统 接地电流 计算模型 

分 类 号：TD611.5[矿业工程—矿山机电]