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A single-phase UPS system based on TRINIT/sup y/ converter topology using voltage-regulated current-controlled feedback control approach | IEEE Conference Publication | IEEE Xplore

A single-phase UPS system based on TRINIT/sup y/ converter topology using voltage-regulated current-controlled feedback control approach


Abstract:

A proposed single-phase uninterruptible power supply (UPS) system derived from a triple rectifier inverter neutral inter-Ty (TRINlT/sup y/) converter topology utilizing v...Show More

Abstract:

A proposed single-phase uninterruptible power supply (UPS) system derived from a triple rectifier inverter neutral inter-Ty (TRINlT/sup y/) converter topology utilizing voltage-regulated current-controlled feedback approach is presented here. The proposed UPS model presents the advantages of high power conversion efficiency, unity input power factor (reactive power compensation), as well as low input and output total harmonic distortion (harmonic power compensation) in the voltages and currents under normal mode of operation. Meanwhile, during backup mode of operation, this UPS has the capability of providing grid isolation without any backward power feed into the faulted utility supply, while having low output voltage and current total harmonic distortion. It also eliminates the series transformer and the power factor corrector used in conjunction with the traditional stand-alone UPS, and it is impervious to load variations. In addition, this UPS has the desirable characteristics of making seamless transition from normal to backup mode during power failures and vice versa, as well as providing controlled voltage charging at the dc bus link. Lastly, the circuit structure is simple, light weight, and can be implemented at a low cost using the standard commercial available components. Simulation and some initial experimental results are presented to demonstrate the validity and efficacy of the proposed UPS system and control strategy.
Date of Conference: 20-25 June 2004
Date Added to IEEE Xplore: 15 November 2004
Print ISBN:0-7803-8399-0
Print ISSN: 0275-9306
Conference Location: Aachen, Germany

I. INTRODUCTION

In recent years, intensive research has been performed on the design of uninterruptible power supply (UPS) systems to provide clean and uninterruptible power to equipment in critical applications such as personal computers, medical equipment, telecommunication systems, industrial and commercial controls, etc under essentially any normal or abnormal utility power conditions. In order to supply continued power to the load in the absence of utility power, energy storage systems such as batteries or flywheels are incorporated in the UPS for this purpose. The power conversion is mainly accomplished using power electronics due to the advanced development of fast-switching high-current power transistors.

References

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