A high step-up current-fed phase-shift double-input DC-DC converter using asymmetrical PWM switching strategy

Stand-alone application of PhotoVoltaic (PV) systems have been more considered in recent years. To achieve desired characteristics in power conditioning systems, double input DC-DC converters have been proposed. In this paper a new high step-up current-fed double-input DC-DC converter is proposed based on full-bridge converter. Asymmetrical switching strategy has been used to achieve high voltage gain and manage the power between PV and Energy Storage (ES). Also the converter uses a voltage multiplier which increases voltage gain, in turns. By proposed Asymmetrical PWM switching strategy a combined PWM - Phase-Shift converter is designed which contains characteristics of both converters. The operation modes of proposed topology are discussed in section II based on new switching strategy, voltage gain is presented in section IV. Finally the Experimental results are presented in section V to validate the characteristics of proposed converter.