A hybrid parallel active filter / off-line UPS unit for computer loads

• Autorzy: Ghennam T. , Darwish M.
• Języki publikacji: EN

Abstrakty

EN

A hybrid parallel active filter / off-line uninterruptible power supply (UPS) system is proposed. The hybrid system contains a single inverter which acts as a parallel active filter during the normal mode of operation (when the AC supply is available); and also supplies the load with energy from the UPS back-up battery during the back-up mode of operation (when the AC supply is not available or is beyond the preset tolerance). In both modes of operations the inverter is controlled in such way so that the line current is a pure sinusoid. This is to improve the input power factor and to eliminate the current harmonics in the first mode and to remove any stress on the back-up battery caused by the discharging during the second mode of operation. A full simulation results and an experimental setup is presented together with a closed loop control algorithm.

Słowa kluczowe

EN

active filters; UPS systems; computer power supplies; current harmonics

• Wydawca: AGH University of Science and Technology ; Lodz University of Technology
• Czasopismo: Electrical Power Quality and Utilisation. Journal
• Rocznik: 2008
• Tom: Vol. 14, iss. 2
• Strony: 41--48
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Ghennam T.

autor

Darwish M.

• Brunel University, School of Engineering and Design, Uxbridge, Middlesex, UB8 3PH, UK,

Bibliografia

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• 2. Power Quality Survey, BSRIA, report 14419/1, may 1999.
• 3. Pearson C.C., Uthayanan V.: The BSRIA power quality guide, application guide. AG2/2000, July 2000.
• 4. Ando I., Takahashi I., Tanaka Y., Ikehara M.: Development of high efficiency UPS having active filter ability composed of a three arms bridge. 1997. Industrial Electronics, Control and Instrumentation. IECON 97. 23rd International Conference.
• 5. Bekiarov S.B., Emadi A.: Uninterruptible power supplies: classification, operation, dynamics and control. In proceeding of the 17 th IEEE Applied power electronics Conference, Dallas, TX, March 2002, pp. 597–604.
• 6. Tarafdar Haque M. Single-phase PQ theory for active filter. TENCON ‘02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering Volume 3, 28–31 Oct. 2002 Page(s):1941–1944
• 7. Emadi A., Nasiri A., Bekiarov S.B.: Uninterruptible power supplies and active filters. CRC PRESS 2005.