Simulation of bidirectional energy storage inverter DCDC+grid connected PQ control 

Simulation of DCDC+DCAC grid connected control for bidirectional energy storage inverter
(1) Description: DCDC adopts a synchronous boost topology structure, and its main function is to maintain system power balance and stabilize the DC bus voltage. The DCAC part adopts a three-phase full bridge inverter topology structure, whose main function is to transmit electrical energy to the power grid and control the active and reactive power transmitted to maintain near the given values.
(2) Energy storage DCDC control: Adopting dual closed-loop control, the outer loop of DC bus voltage stabilizes the bus voltage, and the inner loop of current controls current charging and discharging.
(3) Three phase grid connected inverter: adopting PQ control, it mainly includes two parts: power outer loop and current inner loop. The power outer loop maintains constant power output, and the current inner loop responds to the grid connected current.
Simulated working conditions:
① 0-0.5 seconds, forward inverter with a constant power of 20KW delivers power to the power grid, storing and discharging energy
② 0.5-1 second, reverse rectification constant power 20KW feedback energy, energy storage charging
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