双重移相控制的双向有源DC-DC变换器回流功率优化的开关策略  

Switching strategy for backflow power optimization of bidirectional DC-DC converter with dual-phase-shift control

作　　者：李笑笑 严佩敏[1] Li Xiaoxiao;Yan Peimin(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学通信与信息工程学院

出　　处：《电子测量技术》2019年第20期72-77,共6页Electronic Measurement Technology

摘　　要：通过建立双向有源DC-DC变换器回流功率的数字模型,分析了双重移相控制下的变换器的工作原理及其性能。传统移相控制下的变换器会产生较大的电流应力和回流功率,导致系统损耗增加,在这个基础上,提出了一种基于双重移相控制的回流功率优化控制的开关策略,通过调节内外移相比使变换器工作在回流功率最小的状态下,并给出相应的控制方案。回流功率优化控制的开关策略可以降低系统的回流功率,提高效率,增加系统调节的灵活性,通过仿真计算证实该策略的可行性和有效性。In this paper,the principle and performance of converters with dual-phase-shift control are analyzed through establishing backflow power model of bidirectional DC-DC converters.The traditional single-phase-shift control converters produce large current stress and backflow power,which will increase loss of the system.On this basis,a switching strategy for backflow power optimized based on dual-phase-shift control is proposed.By adjusting the internal and external phase-shift ratio,the converters work in the state of minimum backflow power,Corresponding control scheme also appears later.The switching strategy for backflow power optimized reduces backflow power,improves efficiency and increases the flexibility of system.Simulation verifies the feasibility and effectiveness of proposed strategy eventually.

关 键 词：双有源DC-DC变换器 回流功率 移相控制 优化控制 

分 类 号：TM46[电气工程—电器]