Series-Connected Forward-fly Back Converter for High Step-up Power Conversion
Aswathy.P.S1, M.S.P.Subathra2
1Aswathy.P.S, Electricaland Electronics Engineering, Karunya University, Coimbatore, (Tamil Nadu), India.
2M.S.P. Subathra, Electrical and Electronics Engineering, Karunya University, Coimbatore, (Tamil Nadu), India.
Manuscript received on November 21, 2012. | Revised Manuscript received on December 03, 2012. | Manuscript published on December 30, 2012. | PP: 269-273 | Volume-2, Issue-2, December 2012.  | Retrieval Number: B0929112212 /2012©BEIESP

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Abstract: Global energy consumption tends to grow continuously. To satisfy the demand for electric power against a background of the depletion of conventional, fossil resources the renewable energy sources are becoming more popular. According to the researches despite its fluctuating nature and weather dependency the capacity of renewable resources can satisfy overall global demand for energy. High gain DC,DC converters are the key part of renewable energy systems .The designing of high gain DC,DC converters is imposed by severe demands. The power conditioning systems for the photovoltaic power sources needs high step-up voltage gain due to the low output of the generating sources. This paper presents a high step-up topology employing a Series-connected Forward-Fly Back converter, which has a series-connected output for high boosting voltage-transfer gain. Series-connected Forward-Fly Back converter is a hybrid type of forward and fly back converter. By stacking the outputs of them extremely high voltage gain can be obtained with small volume and high efficiency with a galvanic isolation. The separated secondary windings reduce the voltage stress of the secondary rectifiers and results in high efficiency. 
Keywords: DC-DC Power Converters, Forward Converter, fly Back Converter, Power Conditioning.