0.4kV三相四线运行中零线重复接地的设计与应用  

The Design and Application of Grounding Repeatedly of Zero Line in 0.4kV three-phase four-line Running

作　　者：袁乐崧 

机构地区：[1]广东省东莞供电局石排供电公司,广东东莞523330

出　　处：《电气技术》2008年第1期71-73,77,共4页Electrical Engineering

摘　　要：本文介绍了在TN-C系统中零线重复接地的作用和方法。分析零线重复接地对电力系统运行的重要性,从多角度指出零线断开后的危险,结合东莞供电局石排供电公司电力运行的特性,采用由水平接地体联结n个垂直接地体的接地装置方式,计算出零线重复接地电阻值取小于10?的设计比较符合本地实际。运行结果表明该方式具有实际的可操性,适用本地区广泛推广。Affects and Methods of Grounding Repeatedly of Zero Line in TN-C System are introduced in this article.The importance of Grounding Repeatedly of Zero Line to Power System running is analyzed,and from multiple perspectives the dangers after Zero Line breaking are pointed out.Combinated with the characteristics of Power Running in Shipai Power Supply Company of Dongguan Power Supply Bureau,method of Grounding Devices was applied,that is,n pcs of Vertical Grounding Objects were connected by Horizontal Grounding Objects,to calculate that the design of which the resistance value of Grounding Repeatedly of Zero Line is less than 10? conforms to local facts.The result of Running,shows that such this method is feasible,which is fit to wide application in local areas.

关 键 词：TN-C系统 零线 重复接地 水平接地体 垂直接地体 

分 类 号：TM862[电气工程—高电压与绝缘技术]