High real output power on-line UPS system with built-in reactive power compensation

T. J. Liang, J. L. Shyu, J. F. Chen

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

9 Citations (Scopus)

Abstract

A circuit topology is proposed for single-phase on-line UPS systems. The proposed circuit incorporates a built-in bidirectional converter which provides power factor correction and active power filtering. The input stage, based on a bidirectional full-bridge converter, functions as a rectifier with unity power factor correction for normal ac line mode operation, and as an active power filter for outage mode operation. During input power failure, the DC/AC inverter output stage supplies real power from the battery bank to the critical load. Simultaneously, the bidirectional AC/DC converter functions as an active power filter, providing reactive power to the load. Thus, the real power capability is improved compared to conventional on-line UPS. Simulation of the proposed topology shows, for normal mode, a well regulated sinusoidal output voltage with minimum harmonic distortion for nonlinear loads, near-unity power factor and low-harmonic current for ac line. For outage mode, simulation shows a sinusoidal output voltage with low total harmonic distortion and a near-unity output power factor with a high utilization factor. Simulation results confirm the feasibility and features of the proposed UPS scheme.

Original languageEnglish
Title of host publicationPESC Record - IEEE Annual Power Electronics Specialists Conference
Pages1555-1560
Number of pages6
DOIs
Publication statusPublished - 2001 Oct 22
Event2001 IEEE 32nd Annual Power Electronics Specialists Conference - Vancouver, BC, Canada
Duration: 2001 Jun 172001 Jun 21

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
Volume3
ISSN (Print)0275-9306

Other

Other2001 IEEE 32nd Annual Power Electronics Specialists Conference
CountryCanada
CityVancouver, BC
Period01-06-1701-06-21

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'High real output power on-line UPS system with built-in reactive power compensation'. Together they form a unique fingerprint.

  • Cite this

    Liang, T. J., Shyu, J. L., & Chen, J. F. (2001). High real output power on-line UPS system with built-in reactive power compensation. In PESC Record - IEEE Annual Power Electronics Specialists Conference (pp. 1555-1560). (PESC Record - IEEE Annual Power Electronics Specialists Conference; Vol. 3). https://doi.org/10.1109/PESC.2001.954340