[1]陈根永,侯永将,杨凤民,等.20kV配电电压等级的接地方式研究[J].郑州大学学报(工学版),2010,31(03):33-37.[doi:10.3969/j.issn.1671-6833.2010.03.009]
　CHEN Genyong,General Hou Yong,Yang Fengmin,et al.Research on grounding method of 20kV distribution voltage level[J].Journal of Zhengzhou University (Engineering Science),2010,31(03):33-37.[doi:10.3969/j.issn.1671-6833.2010.03.009]

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20kV配电电压等级的接地方式研究()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

31卷

期数:

2010年03期

页码:

33-37

栏目:

出版日期:

2010-03-01

文章信息/Info

Title:

Research on grounding method of 20kV distribution voltage level

作者:

陈根永; 侯永将; 杨凤民; 等.

郑州大学,电气工程学院,河南,郑州,450001, 郑州供电公司,河南,郑州,450053

Author(s):

CHEN Genyong; General Hou Yong; Yang Fengmin; etc

关键词:

中性点接地方式;  单相接地故障;  消弧线圈;  电容电流;  过电压;  配电网

Keywords:

Neutral point grounding method;  Single-phase ground fault;  arc suppression coil;  capacitor current;  overvoltage;  Distribution grid

DOI:

10.3969/j.issn.1671-6833.2010.03.009

文献标志码:

A

摘要:

针对20 kV城市电缆配电网出现的单相接地故障电流增大以及接地后过电压问题.研究适合20 kV配电不同网络结构的中性点接地方式.通过对20 kV配电网中性点不接地、经消弧线圈接地、经电阻接地3种方式进和接地故障稳态分析、暂态分析和系统参数分析.并与10 kV配电网接地方式相比较,说明20 kV配电网接地方式应用范围,当系统电容电流小于10 A时可采用中性点不接地方式;当系统电容电流在10～15 A之间时可采取消弧线圈接地方式;当系统电容电流在100～1 000 A之间时可采用低电阻接地方式;算例分析表明20 kV电缆配电网宜采用中性点经低电阻接地方式.

Abstract:

Aiming at the single-phase ground fault current increase and overvoltage after grounding in 20 kV urban cable distribution network. The neutral grounding method suitable for different network structures of 20 kV power distribution was studied. Through the 20 kV distribution network neutral point ungrounded, arc suppression coil grounding, resistance grounding three ways and ground fault steady-state analysis, transient analysis and system parameter analysis. Compared with the grounding mode of 3 kV distribution network, it shows the application range of the grounding mode of 10 kV distribution network, and the neutral point ungrounding method can be used when the system capacitor current is less than 20 A. When the system capacitance current is between 10~10 A, the arc suppression coil grounding method can be adopted; When the system capacitance current is between 15~100 1 A, the low resistance grounding method can be used; Example analysis shows that the neutral point is grounded with low resistance in the 000 kV cable distribution network.

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