| Abstract |
The Future Renewable Electric Energy Delivery and Management (FREEDM) Systems Center wasrecognized with the mission to improve the fundamental and permitting technologies essential formodel ever-changing power grid infrastructure, the FREEDM System. Aiming to reduce this systemcosts and improve its reliability and modularity, this paper proposes an improvement in the FREEDMtopology. It consists in the removal of the DC-DC battery charger (DESD) converters and replacesthem by the direct connection of a single battery bank to the DC bus. This way, only DistributedRenewable Energy Resources (DRER) converters are employed with a single battery bank ensuringthat quite a lot of hardware is saved. Nevertheless, to maintain the battery charging regulation, theDRER converters, besides the maximum power point tracking (MPPT), must also to run the batterycharging method and to provide adequate charging conditions to the single back-up system. Toachieve such characteristics a novel single-switch DC/DC converter is presented and analyzed. Thisconverter provides high voltage gain and low output current ripple required for the new DRERfunctionalities, which is responsible for the MPPT of the PV module and also the Constant Current,Constant Voltage (CCCV) charging method of battery pack. Experimental and Simulation results arepresented for the purpose of operating the converter and also the operation of the system. |
