A phase shedding technique for PV system based on interleaved boost converter

This paper proposes a new phase shedding control method of an interleaved boost converter (IBC) as photovoltaic (PV) pre-regulator. The efficiency improvement of the IBC and the minimization of current overshoot are obtained using a hysteresis control with proposed incremental duty control (IDC) method. The output voltage of the converter is 400V and two-phase boost converters operated at continuous conduction mode (CCM) are used to build the IBC. Experiment results from a 1kW prototype are presented an improvement of the system efficiency in a wide power range.