Model Predictive Control for Battery Charger Applications with Active Damping

This paper presents a model predictive control approach for a current source rectifier that can be used as battery charger fed from three-phase ac grid. The proposed MPC technique allows to charge the battery with a constant current or voltage as what is required for cyclic charge process of batteries. The proposed technique ensures unity input power factor operation for grid side. Instantaneous active and reactive power control combined with active damping technique is achieved to obtain safe charging process. The method does not require any input current sector information, and there is no need for sinusoidal input current reference synchronized with grid voltage. The proposed control method requires only active power demand to control whole system. A simulation study is carried out to observe the proposed method in terms of steady-state and dynamic responses and supply current quality.