内蒙古电力技术Issue(3)：28-32,39,6.DOI:10.3969/j.issn.1008-6218.2014.03.018
变电站220 kV侧单相短路电流超标问题分析及解决方案
Analysis of Single Phase Short Circuit Exceed on Transformer Substation 220 kV Bus and Its Solving Measures
王薇 1杜飞2
作者信息
- 1. 内蒙古电力勘测设计院，呼和浩特 010020
- 2. 薛家湾供电局，内蒙古 鄂尔多斯 010300
- 折叠
摘要
Abstract
Jilantai Substation is an important 500 kV substation in Inner Mongolian Grid. 3 main transformers parallel operate, along with several power plant generators puting in operation, single phase short circuit of Jilantai 220 kV bus is 50.2 kA, exceeding the rated capacity of circuit breakers. This problem will seriously threaten the safty of power system.Be aimed at this problem,several methods was discussed to reduce single phase short circuit of Jilantai 220 kV bus, including reduing ground point, installing small neutral reactor on transformer, and spliting operation 220 kV bus, and building the forth transformer. Meanwhile calculated the short circuit of Jilantai 220 kV bus base of above methods. The decreasing amplitude of 2nd method was 6 kA. Through detail analysis, installing small neutral reactor on transformer was the most available method.关键词
500 kV变电站/单相短路电流/额定遮断容量/接地点/中性点小电抗/分裂运行Key words
500 kV transformer substation/single phase short circuit/rated breaking capacity/ground point/neutral reactor/splitting operation分类
信息技术与安全科学引用本文复制引用
王薇,杜飞..变电站220 kV侧单相短路电流超标问题分析及解决方案[J].内蒙古电力技术,2014,(3):28-32,39,6.
