Design of T-type three-level energy storage inverter and grid-connected control strategy

摘要

Energy storage technology is an important measure for power output of new energy generation system. T-type three-level structure is adopt as the topology of energy storage inverter. Mathematical model of grid-connected operation in ABC coordinate system and dq coordinate system is built. A double closed loop control strategy of which inner loop current and outer loop power control is proposed. The simulation model of T-type three-level energy storage converter when in grid-connected is built in MATLAB, and the simulation is completed to verify the correctness of the control strategy. At the same time, the hardware structure and main function are designed. The experimental platform is built to verify the correctness of the proposed control strategy.