500kV变电站220kV侧母线短路过电流防范措施分析  

Analysis of Precautionary Measures for Reducing 500kV Substation 220kV Bus Circuit

作　　者：于赞梅 孙凯航 刘森[2] 

机构地区：[1]国网河北省电力有限公司石家庄供电分公司,石家庄050051 [2]河北省电力勘测设计研究院,石家庄050031

出　　处：《河北电力技术》2017年第6期35-38,共4页Hebei Electric Power

摘　　要：针对国网河北省电力有限公司500kV变电站220kV侧母线单相短路电流超标问题,进行了原因分析,提出了串接小电抗限流的防范措施,并分析网架结构对小电抗限流作用的影响,说明了该措施的应用效果,给出了小电抗阻值的选取和变压器中性点绝缘配合的工程指导意见。By analyzing the causes of overcurrent in Hebei Power Corporation,series neutral reactor is proposed to reduce the500 kV substation＇s 220 kV bus circuit.And this article has a discussion for the influence of grid structure on series neutral reactor,the simulation calculation verifies the positivity effect.In the end,this paper gives the advice for the selection of the series neutral reactor values and transformer neutral insulation coordination.

关 键 词：自耦变压器 中性点接地小电抗 单相短路电流 绝缘配合 

分 类 号：TM411.3[电气工程—电器]