中文摘要：

从端口功率流动的角度揭示三端口变换器的拓扑构成和运行机理，由此提出组合式三端口和集成三端口变换器拓扑族的系统生成方法。从构造三端口变换器所需功率流为切入点，与双输入变换器和双输出变换器比较，并构造新的可控功率通路，得到了一系列三端口变换器拓扑并给出拓扑生成方法。给出由典型的Buck、Boost和Buck／Boost生成三端口变换器的拓扑实例，进行分析和实验验证。

英文摘要：

The topology mechanism of a three-port converter is discovered in the light of power flow, and a novel topology derivation theory for generation of combined and integrated three-port converter topologies was proposed based on the integration of dual-input and dual-output topologies. The generation principle and methods for a series of new topologies were given. And the three-port converter topologies derived from basic Buck, Boost and Buck/Boost converters were presented. Operational mode analysis is conducted, and experimental results verify the analysis.