北仑电网小电阻接地方式下备自投应用分析 

王丁1，彭蛟2 
1 国网宁波供电公司，浙江 宁波 315800； 2 国网宁海县供电公司，浙江 宁波 315600 
 

摘 要：阐述了备自投装置工作的基本原则，并结合北仑电网小电阻接地方式的应用情况具体分析了备自投运行特点和工作原理，总结了两种小电阻接地方式对备自投实际运行的影响，明确了电源主变为Y/Δ接线，接地变压器直接接于主变Δ线圈引线，其中性点经低电阻接地的方式是更为合理的接地方式，有效提高了电网供电可靠性。
关键词：小电阻接地；备自投；应用
中图分类号：TM762.1 文献标识码：B 文章编号：1007-3175(2014)04-0043-03

Application and Analysis of Spare Automatic Device of Beilun Power Network under Small Resistance Grounding Method 

WANG Ding1, PENG Jiao2 
1 State Grid Ningbo Power Supply Company, Ningbo 315800, China;
2 State Grid Ninghai Power Supply Company, Ninghai 315600, China 
 

Abstract: Description was made to the basic working principal of spare automatic device. Combined with application situation of the small resistance grounding method of Beilun power network, this paper analyzed the spare automation device operation characteristics and working principle, summarizing impacts of two kinds of small resistance grounding methods on spare automatic device operation and determining the main transformer of power supply to be in Y/Δ wiring and grounding transformer to be directly connected to the lead of main transformerΔwinding, of which its neutral point via small resistance grounding method was more reasonable grounding method, so as to effectively lift power network power supply reliability.
          Key words: small resistance grounding; spare automatic device; application

参考文献
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