摘要
采用傅里叶级数求和的方法建立双有源桥DC-DC变换器在移相控制下统一的数学模型,针对双有源桥DC-DC变换器直流侧电压不匹配时在传统单移相控制方式下电感电流有效值过大的问题,提出了优化电感电流有效值的双重移相控制方式。对工作在升压、降压、电压平衡状态下的双有源桥DC-DC变换器在传统单移相、双重移相控制方式下电感电流有效值随传输有功功率变化的情况进行对比分析。在此基础上根据变换器工作在升压、降压状态,提出对应的双重移相控制方式,以达到优化电感电流有效值的目的,使工作在该状态下的变换器具有更小的通态损耗,提高了变换器的效率。实验验证了该双重移相控制方式的有效性和优越性。
A unified mathematical model of dual-active-bridge DC-DC converter in phase-shifting control is established by the summation of Fourier series and a double phase-shifting control mode is proposed to avoid the overlarge effective current of its inductor when the DC voltage of dual-active-bridge DC-DC converter in traditional single phase-shifting control mode is not matched. The variation of effective inductor current along with the variation of the transferred active power are comparatively analyzed for the dual-active-bridge DC-DC converter operating in the boosting,bucking or balanced voltage condition under traditional single or double phase-shifting control mode,based on which,a double phase-shifting control mode corresponding to the boosting or bucking voltage condition is proposed to optimize the effective inductor current for the less conduction loss and better efficiency of converter. Experiment verifies the effectiveness and superiority of the proposed double phase-shifting control mode.
出处
《电力自动化设备》
EI
CSCD
北大核心
2017年第5期14-20,共7页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51577187)~~
关键词
双有源桥DC-DC变换器
傅里叶级数
移相控制
升、降压特性
电流有效值
dual-active-bridge DC-DC converter
Fourier series
phase-shifting control
boost and buck characteristics
effective current
