针对波浪能发电特点，提出了一种新型三端口DC/DC变换器。该变换器是在两端口全桥变换器的基础上，增加了1个变压器副边绕组和2个前级变换器，具有输入电压变化范围宽、输入输出电压变比大、安全性能高等优点。3个端口互相隔离，通过占空比控制，能够使各工作状态下输出电压保持稳定。分析了该变换器的工作原理和开关模态，给出了元件参数选择依据，并通过Saber仿真验证了理论分析的正确性。%In terms of the characteristic of wave power, a novel three⁃port DC/DC converter is proposed. The converter is generated by increasing a transformer secondary winding and two forward converters based on the two⁃port full⁃bridge converter, which has the advantages of wide input voltage range, high ratio between input and output voltage, high security etc. Three ports are isolated from each other, duty cycle is controlled to keep the output voltage steady in various work states. Working principle and operational modes are analyzed, selecting rules of component parameters are given. The theoretical analysis is verified by Saber simulation.
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