中性线的转换对UPS性能的影响和对策
作者:中讯邮电咨询设计院有限公司 刘希禹 上传时间:2012/10/26 14:33:38
摘要:由于低压配电系统接地故障保护(GFP)的需要,市电与备用发电机组电源转换电路,必须采用4极自动转换开关(ATS),而有些4极ATS在转换过程中存在中性线中断现象,严重影响了UPS的正常运行,由此引发的UPS故障和负载停电事件越来越受到关注。本文分析电信和数据中心常用市电和备用发电机组电源转换电路的性能,及其对GFP和UPS运行的影响,提出工程实用解决方案。
叙词:中性线转换 接地故障保护 4极ATS 中性线中断 重叠中性线转换
Abstract:In order to meet the needs of low voltage distribution system ground fault protection (GFP) the 4 pole automatic transfer switch (ATS) must be used for the transfer switch circuit between utility and standby generator set. But some of the 4 pole ATS use break before make neutral pole which can cause the neutral line interruption. The interruption of neutral line has serious impact on the UPS performance and even causes critical load power down, which has attracted more and more attention at present. This paper describes some transfer switch circuits used in telecommunication and data center, analyses their performance and the effect on GFP and UPS performance. And practical engineering solutions are also proposed.
Keyword:Switching the neutral conductor, Ground fault protection, 4 Pole automatic transfer switch, Neutral line interruption, Overlapping neutral switching,
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