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This paper presents an performance improvement of neutral-point balancing using DC/DC converter. The proposed energy storage system (ESS) is composed of AC/DC three-level converter and DC/DC three-level converter. The conventional neutral-point control method is balanced by adding a duty-offset to the duty of the switches. But this paper is proposed adding additional neutral-point controller using...
This paper proposes an output current ripple reduction algorithm using model-based predictive control (MPC) for an energy storage system (ESS). In single-phase systems, the DC/AC inverter has a second-order harmonic at twice the grid frequency of a DC-link voltage caused by pulsation of the DC-link voltage. The output current of a DC/DC converter has a ripple component because of the ripple of the...
This paper presents stability improvement in an on-board battery charger for electric vehicles. The on-board battery charger consist a power factor correction (PFC) circuit and phase shift full-bridge converter. The PFC circuit regulates the DC-link voltage using the voltage and current controller. It also corrects the power factor of an input current. The full-bridge converter has control of the...
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