Solar PV Fed Fast Charging Converter with Isolated Unidirectional Dual-Bridge Topology

In this paper a solar fed isolated unidirectional dual bridge (IUDB) dc-dc converter is proposed for fast charging of batteries of electrical vehicles (EVs). A dc-dc power electronic circuit is required to extract maximum power from the solar PV out of its nonlinear power characteristics. An interleaved boost converter (IBC) is used to extract the maximum power from the solar PV array. The Interleaved boost converter has more current handling capability and produces high quality DC output from the solar PV system. It consists of less number of active switches with one active full bridge and other uncontrolled diode bridge leading to lower cost and less complexity The proposed unidirectional isolated dual bridge has the capability of power transfer according to the battery requirement with better control of various charging modes. In this paper the converter operation and principle are analyzed. The simulations of the proposed converter control are carried out through the PSCAD software tool.