牵引变电所地返回电流及接地网电位抬升研究  

Research on earth-return current and grounding grid potential rise in traction substation

作　　者：贾秀芳[1] 马益锋[1] 黄俊[1] 赵成勇[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北保定O71003

出　　处：《电力系统保护与控制》2012年第10期116-119,126,共5页Power System Protection and Control

基　　金：河北省自然科学基金(E2011502097)~~

摘　　要：分析了交流电气化铁路中牵引回流在钢轨和地中的分布,推导了流经牵引变电所接地网的地返回电流和接地网电位抬升。在PSCAD/EMTDC环境下搭建牵引供电系统仿真模型,研究了钢轨大地间泄漏电导、大地电阻率和牵引变电所接地网接地电阻对地返回电流及地网电位抬升的影响。研究结果表明,地返回电流和地网电位抬升受钢轨大地泄漏电导和接地网接地电阻影响较大,受大地电阻率影响较小。The earth-return current flowing through grounding grid in traction substation and ground potential rise （GPR） are obtained after analyzing the traction return current distribution in rail and earth. In PSCAD/EMTDC, a simplified traction system is modeled to study the earth-return current and GPR sensitivity to rail-to-earth leakage conductance, earth resistivity and grounding grid resistance. The simulation results show that rail-to-earth leakage conductance and grounding grid resistance have a more obvious influence on earth-return current and GPR while earth resistivity has a limited influence.

关 键 词：电气化铁路 牵引回流 地返回电流 接地网 电位抬升 

分 类 号：TM922.4[电气工程—电力电子与电力传动] TM862