As the power of hydroelectric power generation and photovoltaic power generation systems are frequently fluctuated and have poor stability, a multi-port converter and its energy cooperative control scheme are proposed for new energy access. Firstly, the common topologies of multi-port converters are compared and analyzed, and one of the multi-port converters is selected. Secondly, for the general problem of energy complementation of a variety of renewable energy (such as light, water and wind etc.), a multi-mode energy control cooperative strategy is proposed based on multi-port converters. Finally, the running status under multiple working conditions is simulated, and the simulation results show that the two-layer control strategy can effectively execute the energy coordination and scheduling, which can alleviate the seasonal overload problem in the region vividly. Therefore, the multi-port converters show strong adaptability for the control of the DC bus voltage and output power.