UPS“雙總線輸出”供電系統用負載自動切換開關(上)

摘要：統計資料顯示，在信息網絡機房中僅配置＂N+1＂UPS冗余供電系統，并不能消除＂網絡癱瘓＂故障．為確保為于互聯網上的關鍵網絡設備．如服務器的安全運行，有必要在雙總線輸出線路中配置＂負載自動切換開關＂，以便向各種網絡設備提供＂信息網絡＂級的優質電源．采用DSP全數字技術及多重冗余調控技術設計的負載自動切換開關，可使網絡供電系統獲得如下優點：消除”單點瓶頸”故障隱患，提高UPS的可利用率，提高供電質量的”擇優供電”功能；增強網絡設備運行的安全性的”故障隔離”保護功能等．本文詳細地分析和討論負載自動切換開關的型號、工作原理、執行安全切換操作的前提條件、工作模式、技術參數、選用主語事項及供電系統的設計方案。 敘詞：負載自動切換開關　　“單點瓶頸”故障隱患　　擇優供電　　故障隔離 Abstract：The related statistics have shown that"N+1"type of the parallel-redundant UPS system can not eliminate the failure of the network paralysis in the network room completely.In order to ensure reliable and safe operation or the key network equipments,such as servers,which are supplied by two or three independent power supplies,it is necessary that the dual-bus type of the parallel-redundant UPS system should be equipped with the automatic Static Transfer Switches(STS).Therefore,a variety of network equipments can be supplied by a so-called"information network"level of high quality sources.Due to that new STS are designed and made by new DSP and multi-redundant logic control techiques,it can provide the following superiorities for network equipments:the eliminationg of "single-point"type the failures;the choose of higher quality of power supply from two independent sources;the isolation of the failsures;the increase of the reliability and fault tolerance for UPS system and so on.The type of the load transfer switches,the operation and matters needing attention,the design schemes of the parallel-redundant UPS system with dual-bus type of output circuits are studied and analyzed in detailed. Keyword：automatic Static Transfer Switches(STS)