Improvement of transient current response of a signle-phase inverter in a V2G system using disturbance rejection and command feedforward control

This paper proposes a control algorithm for disturbance rejection that reduces the overcurrent generated in a single-phase Grid Connected Inverter (GCI) required in the Vehicle to Grid (V2G) function in case of an accident in the grid system. The proposed algorithm contains a grid current observer for grid voltage estimation and a feedforward control algorithm. To verify the control algorithm, the topology used a single-phase IGBT inverter and an LCL low pass filter were used to reduce the harmonics of the inverter output. The proposed grid current control algorithm is developed and verified via simulation and experiment.