电力系统保护与控制2011，Vol.39Issue(17)：93-97,102,6.
500kV主变单相置换可行性研究
Feasibility analysis of single phase replacement for 500 kV main transformers
摘要
Abstract
Combining with the practical project to replace single phase transformer for No.2 main transformer of a 500 kV substation, we studied the loop current, voltage imbalance, current imbalance as well as harmonic current in normal mode and heavy load mode, which are caused by asymmetric three phase short-curcuit voltage after replacing the fault No.2 main transformer with No. 1 A-phase transformer from two aspects of theory analysis and PSCAD/EMTDC simulation, and made a comparison of before and after the replacement. Preliminary conclusions are that the replacement can be temporarily carried out and that three phase short-curcuit voltage of transformer can withstand a certain degree of asymmetry, which provides reference for further studies on the feasibility and applicability of standby transformer for main transformers.关键词
500 kV主变:电压不平衡度/电流不平衡度/谐波电流Key words
500 kV main transformer/ voltage unbalance factor/ current unbalance factor/ harmonic current分类
信息技术与安全科学引用本文复制引用
夏成军,黄冬燕,代文良,邱桂华..500kV主变单相置换可行性研究[J].电力系统保护与控制,2011,39(17):93-97,102,6.基金项目
华南理工大学中央高校基本科研业务费专项资金资助(2009ZM0210) （2009ZM0210）
