变压器中性点接地方式对零序保护的影响
王友怀
(湖北省电力公司调度中心 , 湖北 武汉 430077)
[摘 要] 讨论了2 台 Y0/ Y0/Δ 接线且无绝缘要求变压器的220 kV 变电站的变压器中性点几种常见的接地方式 ,并就变压器110 kV 侧中性点接地方式对母线等值零序阻抗及零序保护的影响做了具体分析。
[关键词] 变压器; 中性点 ; 零序保护
The Influence from Neutral Point Eearthing Mode of Transformer to
Zero Sequence Protection
WANG You2huai
(Hubei Electric Power Dispatching Center, Wuhan 430077)
[Abstract] Several kinds of neutral point earthing modes of two Y0/ Y0/ △transformers,without insulation requirement,at a 220 kV substation were discussed. The influence to the bus equivalent zero sequence impendance and zero sequence protectionfrom the different neutral point earthing mode of the transformer's 110 kV side were specifically analyzed.
[ Key words] transformer; neutral point ; zero sequence protection
