A new solar PV fed multiple-input DC-DC converter for DC micro grid application

This paper proposes a new multiple input DC-DC converter for PV fed DC micro-grid system. The proposed configuration based on series connection of inverting CUK converters, utilizes free-wheeling diode as a by-pass diode. Hence, it can operate either individually or simultaneously depending on availability of input sources. Other salient features of this proposed converter include inherent-voltage boosting capability due to series combination of CUK converters and reduction in additional filtering requirement to filter out high frequency harmonics. The proposed configuration is verified through MATLAB simulations at 500W level. It is suitable for implementing DMPPT of PV modules.