An improved parallel processing ups using a voltage-controlled voltage source inverter

S. W. Lee, H. Dehbonei, S. H. Ko, S. R. Lee, B. H. Jang, Y. H. Moon, T. K. Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents an improved parallel processing uninterruptible power supply (UPS) for a strong grid using a bi-directional voltage-controlled voltage source inverter (VCVSI). To maintain the load voltage at the desired value and to control the active power flow between the VCVSI and grid, the amplitude and phase angle of the inverter output voltage (power angle) must be controlled. Selecting the power angle operating range is an important factor which has a direct effect on various parameters, such as the size of a decoupling inductor, grid power factor and the power ratings of VCVSI components. It is shown how the optimum power angles can be chosen and by restricting the operation of this, the power factor can be maintained above 0.9 at different loads and operating conditions. The paper examines the steady state modeling and analysis of a single phase parallel processing UPS while maintaining a high system power factor under different conditions. Experimental and simulation results of a prototyped 1KVA VCVSI confirms the validity of the proposed method.

Original languageEnglish
Title of host publication7th International Conference on Power Electronics and Drive Systems, PEDS 2007
Pages1508-1512
Number of pages5
DOIs
Publication statusPublished - 2007 Dec 1
Event7th International Conference on Power Electronics and Drive Systems, PEDS 2007 - Bangkok, Thailand
Duration: 2007 Nov 272007 Nov 30

Publication series

NameProceedings of the International Conference on Power Electronics and Drive Systems

Other

Other7th International Conference on Power Electronics and Drive Systems, PEDS 2007
CountryThailand
CityBangkok
Period07/11/2707/11/30

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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  • Cite this

    Lee, S. W., Dehbonei, H., Ko, S. H., Lee, S. R., Jang, B. H., Moon, Y. H., & Ko, T. K. (2007). An improved parallel processing ups using a voltage-controlled voltage source inverter. In 7th International Conference on Power Electronics and Drive Systems, PEDS 2007 (pp. 1508-1512). [4487905] (Proceedings of the International Conference on Power Electronics and Drive Systems). https://doi.org/10.1109/PEDS.2007.4487905