A novel three-phase three-port UPS employing a single high-frequency isolation transformer
A three-phase PWM rectifier and a three-phase PWM inverter are coupled via two four-quadrant full-bridge converter cells and a high-frequency isolation transformer. By employing a third transformer winding and further full-bridge cell battery energy storage is incorporated into the power transfer be...
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Published in | 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551) Vol. 6; pp. 4135 - 4141 Vol.6 |
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Main Authors | , |
Format | Conference Proceeding |
Language | English |
Published |
Piscataway NJ
IEEE
2004
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Subjects | |
Online Access | Get full text |
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Summary: | A three-phase PWM rectifier and a three-phase PWM inverter are coupled via two four-quadrant full-bridge converter cells and a high-frequency isolation transformer. By employing a third transformer winding and further full-bridge cell battery energy storage is incorporated into the power transfer between rectifier and inverter resulting in a three-port UPS concept. The phase shift control of the power flow between the ports is analyzed for square-wave operation of the full-bridge cells. Furthermore, the utilization of the degrees of freedom of the system control, i.e. the extension to duty cycle control for optimizing the system behavior is discussed and control laws ensuring minimum overall system losses are derived. Finally, a control-oriented converter model is proposed and the decoupled control of the power flow of the ports is treated briefly. All theoretical considerations are verified by simulations using PSIM. |
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ISBN: | 9780780383999 0780383990 |
ISSN: | 0275-9306 2377-6617 |
DOI: | 10.1109/PESC.2004.1354730 |