南方电网技术Issue(2)：46-50,5.DOI:10.13648/j.cnki.issn1674-0629.2014.02.010
220 kV变电站主变压器中性点接地方式分析
Analysis of Neutral Point Grounding Mode for the Main Transformer of 220 kV Substations
覃松涛 1黄超 1蒙亮 1郑发林1
作者信息
- 1. 广西电网电力调度控制中心，南宁530023
- 折叠
摘要
Abstract
The change of neutral point grounding mode for 220 kV transformer from single transformer grounding mode to two trans-formers grounding mode, essentially makes an alteration to system zero-sequence impedance.The element status or protection coordi-nation should be changed to adapt to the new mode.By comparison of the characteristics of the two modes, the paper studies the influ-ence of two transformers grounding mode on circuit breaker interrupting capacity, short circuit current and relay settings coordination.Finally, counter measures are summarized for mode changing so as to ensure the safe and stable operation of the grid.关键词
变压器/中性点/单变接地/两变接地/继电保护Key words
transformer/neutral point/single transformer grounding/two transformers grounding/relay protection分类
信息技术与安全科学引用本文复制引用
覃松涛,黄超,蒙亮,郑发林..220 kV变电站主变压器中性点接地方式分析[J].南方电网技术,2014,(2):46-50,5.
