双向变换器基于双移向控制的回流功率优化  

The Flowback Power Optimization of Bidirectional Converter Based on Dual Shift Control

作　　者：葛兆琪 王炜[1] 汪阳 杨睿 GE Zhao-qi;WANG Wei;WANG Yang;YANG Rui(School of Electrical Engineering and Automation,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学电气工程与自动化学院,天津300387

出　　处：《计算机仿真》2020年第12期171-176,共6页Computer Simulation

基　　金：国家自然科学基金(51777137)。

摘　　要：双向变换器由两个对称H桥组成,传统的隔离型双向全桥DC-DC变换器常采用单移相控制方式,虽然原理简单,但会导致较大的回流功率和电流应力,因而存在损耗。为了降低回流功率,提高能量传输效率,通过理论推导详细分析了单移相和双移相控制的回流现象,并建立改进的双移向控制方式。在回流功率数学模型的基础上,推导回流功率和移向比之间的关系,进行分段分析,最终确立各阶段的优化方案。上述方案不仅有效地减小了回流功率,而且扩宽了传输功率调节范围,使得系统调节的灵活性显著提高。最后,通过仿真对比,验证了改进的双移相控制方式的正确性与优越性。The bidirectional converter consists of two symmetrical H-bridges,the traditional isolated bidirection-al full-bridge dc-dc converter usually adopts the single-phase shift control mode.Although the principle of this mode is simple,it will lead to large backflow power and current stress,so there is a large loss.In order to reduce the backflow power and improve the energy transmission efficiency,this paper analyzed the backflow phenomenon of sin-gle-phase and double-phase shift control in detail through theoretical derivation,and established an improved double-phase shift control mode.Based on the mathematical model of backflow power,the relationship between backflow power and shifting ratio was deduced,and the optimization scheme of each stage was finally established through the analysis of segments.The scheme not only effectively reduces the backflow power,but also widens the regulation range of the transmitted power,making the system significantly improve the regulation flexibility.Finally,the correctness and superiority of the improved dual phase shift control method were verified through simulation.

关 键 词：双向全桥 直流-直流变换器 移向控制 回流功率 

分 类 号：TM46[电气工程—电器]