双向全桥DC-DC变换器回流功率优化的双重移相控制  

An Optimized Strategy Based on Backflow Power of Bi-directional Dual-active-bridge DC-DC Converters With Dual-phase-shifting Control

作　　者：张勋[1] 王广柱[1] 商秀娟[1] 王婷 

机构地区：[1]电网智能化调度与控制教育部重点实验室(山东大学),山东省济南市250061 [2]秦皇岛供电公司,河北省秦皇岛市066000

出　　处：《中国电机工程学报》2016年第4期1090-1097,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51177095;51277115)~~

摘　　要：隔离式双向全桥DC-DC变换器(isolated bidirectional dual-active-bridge DC-DC converter,IBDC)采用单移相控制时会产生较大的回流功率和电流应力,导致损耗增加。该文通过建立IBDC采用单和双重移相控制时的输出功率及回流功率数学模型,推导出回流功率与移相比及输入/输出电压调节比之间的数学关系,提出一种以回流功率最小为目标的双重移相回流功率优化控制策略。该控制策略根据传输功率及输入/输出电压调节比所处的不同范围,采用分段优化方法,得出各范围内的最优内移相比。通过仿真计算,对比研究该优化策略与单移相控制下的回流功率曲线。文中给出详细的优化控制算法和系统控制方案,并基于该方案设计制作实验样机。实验结果验证了所提出双重移相回流功率最优控制策略的有效性与可行性。Isolated bidirectional dual-active-bridge dc-dc converters （IBDC） with single-phase-shifting （SPS） control strategy would produce large backflow power and current stress which lead to increasing losses. This paper proposed a backflow-power-optimized dual-phase-shifting （DPS） control strategy by establishing the mathematical models of transmission power and backflow power of the IBDC, deducing the relationship equation between the backflow power and phase-shift ratios and the input/output voltage conversion ratio. This strategy is aiming to minimize the backflow power. The optimal phase-shift ratios were calculated by using the segmentation optimization algorithm in different ranges of transmission power and input/output voltage conversion ratio. The backflow power curves under the proposed DPS and SPS control conditions were analyzed and compared. Then an optimization control algorithm and a system control scheme of the IBDC were presented, furthermore an experimental prototype was developed based on this strategy. The experimental results verify the effectiveness and feasibility of the proposed control strategy.

关 键 词：双向DC-DC变换器 移相控制 回流功率 最优控制 高频变压器 

分 类 号：TM46[电气工程—电器]