基于DSP解耦能流管理的三端口双向DC-DC转换器

A DSP-based Three-port Bidirectional DC-DC Converter with Decoupled Power Flow Management

提出了一种利用三端口DC-DC转换器控制能流的总体设计方案设计.利用一个PWM的占空比来控制整个系统能量环流,结合DSP的独立控制能流的策略,建立了控制模型.该模型能确保整个系统的能量损失最小且能获得快速的动态控制响应.通过仿真和实验模型验证了整个理论研究的正确性.将本方法应用在混合动力电动车和分布式发电的混合能流管理系统中,能提高容量利用率与工作效率,从而实现合理利用能源的目的.

The overall program design of three-port DC-DC converter controlling the power flow was presented. The principle on the phase shift control managing the power flow between the ports was investigated, and a program using a PWM duty cycle to control the power flow circulation throughout the system to ensure the minimal loss of the entire system was proposed. Furthermore, a DSP-based control strategy with the decoupled power flow management was proposed to obtain fast dynamic response on small-signal dynamic analysis. Finally, the entire control model was built, and all the theoretical considerations were validated through simulation and experimental model. This research can improve capacity utilization and work efficiency, thus achieving the purpose of the rational use of energy in mix power flow management system of hybrid electric vehicles and distributed power generation.