三峡电站500kV主变压器中性点接地方式优化选择  

OPTIMAL SELECTION OF 500kV MAIN TRANSFORMER NEUTRAL GROUNDING IN THREE GORGES HYDROELECTRIC POWER STATION

作　　者：朱天游[1] 

机构地区：[1]电力部中南电力设计院,湖北武昌430071

出　　处：《电网技术》1997年第5期48-51,共4页Power System Technology

摘　　要：本文介绍了国内外大型电力变压器中性点接地方式和我国国标的有关规定，论证了三峡500kV生变压器中性点经电抗器接地的必要性、可行性和合理性，通过计算分析，接地电抗器用值采用1／3变压器Uk％是最佳选择，建议采用。The neutral grounding of large - scale powertransformer home and abroad is presented in this paper. Thenecessity, feasibility and rationality of the grounding by smallreactance for 500kV main trans former of Three Gorges Hy-droelectric Power Station are expounded and proved' On thebasis of analysis and calculation the author puts forward thatthe one-third of Uk % of main transformer may be the opti-mal value for the grounding resistance and it is proPosed touse this value in practice.

关 键 词：变压器 中性点 接地电抗器 三峡电站 

分 类 号：TM410.7[电气工程—电器]