中文摘要：

针对分布式光伏发电系统电池模块多、输出电压低、功率不稳定等问题,提出了一种基于电容-二极管倍压单元的双输入高增益Boost型直流变换器。该变换器具有电压调节增益高、开关器件电压应力小、控制自由度多、各输入源功率可灵活分配等优点。首先分析了双输入高增益Boost变换器的工作原理及性能特点,给出了变换器的稳态关系式及开关管电压电流应力计算结果,最后通过一台1000W的实验样机,验证了电路拓扑和理论分析的可行性和正确性。

英文摘要：

According to the problems that more than one energy source, low output voltage of the battery module and unstable output power in the distributed photovoltaic power generation system, a dual input high step-up DC-DC converter with capacitor-diode multiplier ceils was proposed in this paper. The proposed topology has the following advantages： the voltage gain is high, the voltage stress of the switches is low, there are more control freedoms and the sources can deliver power to the load with flexible power management methods. Firstly, the operation mode and the performance characteristics of the converter were presented in detail. Secondly, the steady state analysis, the voltage and current stresses of the switches and the relationship between the input currents were also introduced. Finally, the correctness and feasibility of the proposed circuit topology and the theoretical analysis were fully verified by a 1000W prototype.