A Novel High Gain Single-Switch DC-DC Buck-Boost Converter with Continuous Input and Output Power

In this paper, a novel structure for a high gain single-switch buck-boost converter with continuous input and output power suitable for renewable energies connected to the distribution grid is proposed and illustrated. Unlike traditional buck-boost, CUK, SEPIC and ZETA converter, the proposed converter has continuous currents by the help of inductive filters in its input and output ports. Therefore, this converter is suitable for renewable energy utilization. Without using any galvanic isolations or either coupled inductors with only a single power switch with low stress on, the proposed converter has significant higher voltage gain compared to the other relevant buck-boost converters. In this converter, low numbers of elements are used to avoid high costs and complexity. In order to validate the theoretical equations, simulation results are provided in buck and boost modes in PSIM software.