應急電源用的EPS和UPS電源

摘要：　　綠色奧運、科技奧運是舉世矚目的2008年北京奧運會所追求的主題之一。能向大型體育體設施提供高效、節能和不間斷的電源的應急電源是確保奧運會能順利地運行所必備的電源設備之一。應急電源用的EPS和UPS電源的主要負載為電阻性照明設備和電感性的電機負載。對EPS 和按ECO模式工作的UPS的主要技術要求是：對各種不同功率因數的負載的適應能力強、供電系統的運行效率高和執行”市電供電”轉”逆變器供電”的”切換操作時間”短。本文詳細分析它們在帶各種負載時的工作特性。當市電供電不正常時，UPS同EPS相比，它具有切換時間短、可靠性高和產品的生產”成熟性”高的優勢。 Abstract：　　The major loads of the ESP and UPS for emergency source are lighting installation of the resistance property and electrical motor of the inductive property. Technical requirements for both of them are as followings: The adaptability for variety of the loads with different power factors should be strong; The efficiency of the power source should be high; The time of the transfer operation should be shorter. The operation characteristics and related technical parameters of both of EPS and UPS under driving various loads are analyzed and discussed.　Both of them have the advantages of high efficiency andthe capacity for reducing the energy resources and for driving a variety of the loads with different power factors, if the mains supply is normal.　As compared with EPS, UPS operated under ECO mode has the following advantages: shorter time of the transfer operation, higher reliability and higher maturity of the UPS production technology, if the mains supply is outage.