摘要
该文将扩展移相控制下的双有源桥DC-DC变换器分为0≤D1≤D2≤1与0≤D2<D1≤1两种工作模式,分析扩展移相控制下的电流应力特性与零电压导通特性,推导在此控制方式下全功率范围内实现最小电流应力的优化方案,该方案能使所有开关管在全功率范围内实现零电压导通。对比该方案与现有的扩展移相控制方案、双重移相控制方案、三重移相控制方案的电流应力优化效果与零电压导通特性。同时,该文将双有源桥DC-DC变换器的稳态性能与动态性能的优化相结合,为增强其动态性能,提出环内直接功率控制方案,该方案与最小电流应力控制方案同时作用,当运行状况发生变化后,在保证对电流应力优化的同时,能实现快速的动态响应。最后通过实验结果验证该方案的有效性。
This paper divided the extended-phase-shift(EPS) control of dual active bridge(DAB) DC-DC converter into two working modes, which were 0≤ D1≤ D2≤ 1 and 0≤ D2 < D1≤ 1.The current stress characteristics and zero voltage switching(ZVS) characteristics under EPS control were analyzed. An optimal scheme for achieving the minimum current stress in the whole load range under this control mode was proposed, and with this optimal scheme all active switches could also achieve ZVS in the whole load range. The current stress optimization effect and zero voltage conduction characteristics of the scheme and the existing EPS control scheme, dual-phase-shift(DPS) control scheme, and triple-phase-shift(TPS) control scheme were compared.Simultaneously, the steady-state performance and dynamic performance optimization of DAB DC-DC converter were combined. In order to enhance its dynamic performance, a direct power control scheme in the loop was proposed. The scheme was combined with the minimum current stress scheme, when the operation condition changes, it could achieve fast dynamic response while ensuring the optimization of current stress. Finally, the experimental results verify the effectiveness of the proposed scheme.
作者
郭华越
张兴
赵文广
高帅
王付胜
GUO Huayue;ZHANG Xing;ZHAO Wenguang;GAO Shuai;WANG Fusheng(HeFei University of Technology,Hefei 230009,Anhui Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第13期3889-3898,共10页
Proceedings of the CSEE
