Closed-Loop Control of DC-DC Dual-Active-Bridge Converters Driving Single-Phase Inverters

被引：153
作者：
Qin, Hengsi [1 ]
Kimball, Jonathan W. [2 ]
机构：
[1] SolarBridge Technol Inc, Austin, TX 78758 USA
[2] Missouri Univ Sci & Technol, Rolla, MO 65409 USA
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2014年 / 29卷 / 02期
关键词：
DC-DC power converters; pulse width modulation converters; power smoothing; AC-DC; FRAME; DESIGN; SHIFT; STRATEGY; MODEL;
D O I：
10.1109/TPEL.2013.2257859
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 solid-state transformer (SST) is a high-frequency power electronic converter that is used as a distribution power transformer. A common three-stage configuration of an SST consists of ac-dc rectifier, isolated dc-dc dual-active-bridge (DAB) converter, and dc-ac inverter. This study addresses the controller design issue for a dc-dc DAB converter when driving a regulated single-phase dc-ac inverter. Since the switching frequency of the inverter stage is much higher than that of the DAB stage, the single-phase inverter is modeled as a double-line-frequency (e. g., 120 Hz) current sink. The effect of 120-Hz current by the single-phase inverter is studied. The limitation of a PI-controller, low gain at 120 Hz, is investigated. Two methods are proposed to improve the regulation of the output voltage of DAB converters. The first one uses a bandstop filter and feedforward, while the second method uses an additional proportional-resonant controller in the feedback loop. Theoretical analysis, simulation, and experiment results are provided.
引用
收藏
页码：1006 / 1017
页数：12
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