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Novel line-interactive uninterruptible power supply

Novel line-interactive uninterruptible power supply

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  • Author(s): H.-L. Jou 1 ; J.-C. Wu 2 ; C. Tsai 3 ; K.-D. Wu 1 ; M.-S. Huang 1
    • View affiliations
    • Affiliations: 1: Department of Electrical Engineering, National Kaohsiung University of Applied Sciences, Taiwan, Republic of China
      2: Department of Electrical Engineering, Kun Shan University of Technology, Taiwan, Republic of China
      3: Department of Electrical Engineering, Delta Electronics Corporation, Taiwan, Republic of China
  • Source: Volume 151, Issue 3, May 2004, p. 359 – 364
    DOI:  10.1049/ip-epa:20040481 , Print ISSN 1350-2352, Online ISSN 1359-7043
© IEE
Published

In the paper, a novel uninterruptible power supply (UPS) is proposed with the performance of input current harmonic suppression, input power factor correction and output voltage regulation. This UPS comprises two power converters, a shunt power converter and a series power converter. The shunt power converter is connected to the utility via a link inductor, for providing a compensating voltage, to suppress the input current harmonic and improve the input power factor. The series power converter is connected serially to the load to provide a clean and regulated output voltage. A voltage-mode control algorithm with fast response and simple control circuit is proposed to control the shunt power converter. The series power converter is controlled by a current-mode control to ensure the quality of output voltage. A single-phase prototype is developed and tested to verify the performance of the proposed UPS. Experimental results show that the proposed UPS has expected performance.

Inspec keywords: power convertors; uninterruptible power supplies; electric current control; power inductors; power factor correction; harmonics suppression; voltage control

Other keywords: power factor correction; shunt power converters; link inductor; voltage-mode control algorithm; current-mode control; current harmonic suppression; voltage regulation; series power converters; UPS; line-interactive uninterruptible power supply

Subjects: Current control; Power electronics, supply and supervisory circuits; Power supply quality and harmonics; Voltage control; Power convertors and power supplies to apparatus

References

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