非线性电阻限制10kV电网弧光接地过电压分析  

Limiting the Arc Over-voltage of 10kV Grids in Application of Nonlinear Resistance

作　　者：陈先禄[1] 田凤兰[1] 许文强[2] 刘渝根[1] 袁涛[1] 

机构地区：[1]重庆大学电气工程学院高电压与电工新技术教育部重点实验室,重庆400030 [2]贵州省电力公司贵阳市南供电局,贵州贵阳550002

出　　处：《重庆大学学报（自然科学版）》2006年第7期38-40,共3页Journal of Chongqing University

摘　　要：以贵州某变电站10 kV电网为例,用电力系统电磁暂态程序(EMTP)对中性点不接地和经非线性电阻接地2种情况下的弧光接地过电压进行了计算、分析和比较.结果表明,中性点经非线性电阻接地方式基本保留了中性点经小电阻接地和中性点不接地2种方式的优点,既能很好地限制弧光接地过电压,又能使单相接地时供电不中断,保障了电网供电可靠性.可以认为中性点经非线性电阻接地是一种新型的中性点接地方式,有待于进一步的分析和研究.The aufhors calculate and analyze the arcing grounding overvoltage of 10 kV power network in case of neutral ungrounded and grounding through nonlinear resistance using EMTP, with a actual 10 kV power network of a substation in Guizhou province as an example. The emulational calculation results show that the grounding method which grounds through nonlinear resisitance has the advantages of the other two methods, can better limit the arcing grounding overvoltage and can not stop the power supply .even one phase is grounded by fault, so it can ensure the security of the power networkg supply . the network neutral grounding through nonlinear resistance needs more deep study and analysis as a new network neutral grounding mehtod.

关 键 词：中性点接地方式 非缌洼电阻 弧光接地过电压 伏安特性 

分 类 号：TM863[电气工程—高电压与绝缘技术]