20 kV配电网的中性点接地方式及设备选型 

黄义扬 
广东电网有限责任公司珠海供电局，广东 珠海 519000 
 

摘 要：20 kV配电设备的选择与系统中性点接地方式相关。分析了20 kV配电网采用的中心点不接地、经消弧线圈接地和经小电阻接地3种运行方式，给出了配电网中电容电流的计算方法及配电网设备的选择方案。在20 kV配电网升级改造中，选择合理的中性点接地方式，有利于提高电网供电的持续性和有效性。
关键词：20 kV配电网；中性点接地方式；设备选型
中图分类号：TM727.2；TM862 文献标识码：B 文章编号：1007-3175(2015)08-0044-04

Neutral Grounding Mode and Equipment Selection for 20 kV Distribution Network 

HUANG Yi-yang 
Zhuhai Power Supply Bureau of Guangdong Grid Limited Liability Company, Zhuhai 519000, China 
 

Abstract: The selection of 20 kV distribution equipment involves the system neutral grounding mode. This paper analyzed that the 20 kV distribution network adopted three kinds of operational modes including non-neutral grounding mode, grounding via arc suppression coil and grounding via small resistance. This paper gave the capacitance current calculation mode of distribution network and the selection scheme of distribution network equipment. During the process of 20 kV distribution network upgrading and rebuilding, rational selection of neutral grounding mode is in favour of raising the continuity and validity of grid power supply.
Key words: 20 kV distribution network; neutral point grounding mode; type selection of equipment

参考文献
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