全桥Boost型多输入直流变换器

Full-bridge Boost Mode Multiple-input DC-DC Converters

提出全桥Boost型多输入直流变换器电路拓扑及主从式功率分配和电压电流瞬时值反馈移相控制策略,并对该变换器的电路拓扑、控制策略、稳态原理特性、关键电路参数设计准则等进行深入地分析研究。全桥Boost型多输入直流变换器,是通过高频变压器磁通叠加法将多个全桥Boost型单输入直流变换器在输出端进行电流叠加;主从式功率分配策略,是指n?1路输入源功率固定和1路输入源补充负载所需的不足功率。理论分析和仿真结果表明,该变换器具有电路拓扑简洁、多路输入源可同时或分时供电、功率密度高、输出电压稳定等优点,为实现太阳能、风能、氢能等多种可再生能源联合供电奠定了关键技术基础。原理试验证实了所提出电路拓扑和控制策略的正确性与可行性。

A circuit topology,master-slave power distribution and instantaneous voltage and current feedback phase-shifted control strategy of the full-bridge Boost mode multiple-input DC-DC converter were proposed.Circuit topology,control strategy,characteristic of steady principle,design criteria for the key circuit parameters were fully investigated.The full-bridge Boost mode multiple-input DC-DC converter is equivalent to the output paralleling of multiple full-bridge Boost mode single-input DC-DC converters by add-up of magnetic flux in the high frequency transformer.The meaning of the master-slave power distribution strategy is that n？1 input sources supply constant power,whereas 1 input source supplies residual power which the load requires.The theoretical analysis and simulation results show that the converter has the advantages such as simple topology,multiple input sources supplying power simultaneously or individually,high power density,regulated output voltage etc,and lay the key technical foundation on the joint supply of multiple renewable energy sources such as solar energy,wind energy,and hydrogen energy etc.The correctness and feasibility of the proposed circuit topology and control strategy are fully verified by the principle test.