Abstract: Distributed power generation technology is an important part of modern smart microgrid，in which

three-port isolated DC converter plays an important role. Because the storage battery system can realize the flow

and storage of energy，so the combination of three-port isolated DC converter and photovoltaic power generation

and energy storage power supply system can realize the multi-direction flow of energy. In order to achieve the

above purpose，a DC converter including photovoltaic power generation and energy storage power supply system of the three-port system was studied and designed，the research methods were based on real work scenarios that exist in the analysis of three-port converter different working condition，including the photovoltaic output，the working condition analysis of storage battery and DC load. Based on the combination of traditional phase shift control and photovoltaic maximum power tracking control，different control methods were designed to realize the energy flow and coordination management in the system through the control strategy. Finally，the model was built and verified to verify the feasibility of work scene analysis and energy flow coordination management.

      Key words: three-port isolated converter；phase shift control；energy management