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This paper presents a modular push-pull PWM converter (MPC) for a battery energy storage system, which is intended for grid connections to medium- or high-voltage power systems. The converter per phase consists of a center-tapped transformer and two arms based on a cascade connection of multiple bidirectional PWM chopper cells with floating dc capacitors. This paper proposes a new control method for...
Dynamic and steady-state behavior of a paralleling three-phase AC-to-DC converter with reduced dc bus capacitor and nearly unity power factor is investigated in this paper. The circuit is simulated and the simulation results are analyzed and verified by measurements. A 1.5 kW laboratory prototype with small dc bus capacitance 690 µF (0.46 µF /W) is implemented and tested to verify the feasibility...
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