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Novel line-interactive uninterruptible power supply

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5 Author(s)
Jou, H.-L. ; Dept. of Electr. Eng., Nat. Kaohsiung Univ. of Appl. Sci., Taiwan ; Wu, J.-C. ; Tsai, C. ; Wu, K.-D.
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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.

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:151 ,  Issue: 3 )

Date of Publication:

8 May 2004

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