Topology of super uninterruptible power supply with multiple energy sources

The dramatic loss caused by the power blackout in some industrial applications proposes the requirement for an extremely high reliability uninterruptible power supply (UPS). This paper introduces the concept of super uninterruptible power supply (Super UPS). Multiple energy sources are used to obtain a high reliability, long backup time, high surety UPS system. Classifications for energy sources, power conversion stage and power distribution bus line are established to simplify the power conversion architectures. A generic method to classify the architectures for multiple energy source system is presented. Then a system reliability evaluation method based on different architectures is used to analyze the characteristics of different types of topology. Redundant power conversion stage design to enhance the system reliability is discussed. Finally, a high reliability super UPS architecture is proposed.