| Popis: |
A novel four-port LLC converter for renewable energy application is proposed in this paper. The converter interfaces two Photovoltaic (PV) panels and one battery on the primary side whereas load on the secondary side. This topology allows three energy ports to share a single resonant tank through a hybrid full-bridge structure. The battery port of this converter is bidirectional to balance the load demand and energy generation from the PVs. Two PVs and battery ports are regulated via phase-shift modulation (PSM) to harvest maximum power from the PVs and control the battery operation, whereas the load is regulated by the Switching Frequency Modulation (SFM) technique. All operating scenarios with their steady-state waveforms, analysis, and control scheme are discussed. Finally, a simulation study is carried out to validate the operation of the proposed topology. |
