A novel three-phase three-port UPS employing a single high-frequency isolation transformer

被引:92
作者
Zhao, CH [1 ]
Kolar, JW [1 ]
机构
[1] Swiss Fed Inst Technol, Power Elect Syst Lab, ETH Zentrum, ETL H22,Physikstr 3, CH-8092 Zurich, Switzerland
来源
PESC 04: 2004 IEEE 35TH ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-6, CONFERENCE PROCEEDINGS | 2004年
关键词
D O I
10.1109/PESC.2004.1354730
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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.
引用
收藏
页码:4135 / 4141
页数:7
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