摘要
为了保证供电网最大的安全性和灵活性，设计了基于电源转换开关（方案1）、隔离变压器（方案2）以及采用零序电抗器实现变压器中性点对接地隔离（方案3）的三种TN、IT系统共存于同一建筑的方案。其中，方案3对一般负荷采用中性点直接接地的方式供电，又解决了向特别重要负荷供电的中性点不直接接地的问题，对保证供电连续性和电气安全都具有显著意义。
In order to ensure maximum safety and flexibility of power supply, three schemes with TN abd IT systems being together in a building are designed in this paper, which are respectively based on transfer switchs （Scheme 1 ） , insulating transformer （Scheme 2） and neutral-point earthing isolation using zero-sequence reactor （Scheme 3）. Among them, Scheme 3 can supply power in neutral point directly-grounding mode to the general load, and also to the particularly important load without neutral point directly-grounding, so that this scheme can ensure the continuity and electrical safety of power supply.
出处
《南方电网技术》
2011年第A01期19-22,共4页
Southern Power System Technology
关键词
IT系统
转换开关
隔离变压器
零序电抗器
IT system
transfer switch
insulating transformer
zero-sequence reactor
