Energies 2013, 6(2), 1068-1100; doi:10.3390/en6021068
Article

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

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Received: 26 December 2012; in revised form: 7 February 2013 / Accepted: 8 February 2013 / Published: 21 February 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This paper presents a power system using a high step-up converter for dc load applications. The high step-up converter adopts a boost converter with interleaved mode and a coupled inductor to raise its powering ability and increase its step-up voltage ratio, respectively. In order to increase conversion efficiency, an active clamp circuit is introduced into the proposed one to provide soft-switching features to reduce switching losses. Moreover, switches in the converter and active clamp circuit are integrated with a synchronous switching technique to reduce circuit complexity and component counts, resulting in a lower cost and smaller volume. A perturb and observe method is adopted to extract the maximum power from photovoltaic (PV) arrays. Furthermore, a microchip associated with PWM IC is used to implement maximum power point tracking operation, voltage regulation and power management. Finally, a prototype PV power system with 400 V/6 A has been implemented for verifying the feasibility of the proposed PV power system. It is shown to be suitable for PV energy conversion applications when the duty ratios of switches in the dc/dc converter are less than 0.5.
Keywords: photovoltaic power system; high step-up converter; boost converter; perturb and observe method
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MDPI and ACS Style

Tseng, S.-Y.; Wang, H.-Y. A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications. Energies 2013, 6, 1068-1100.

AMA Style

Tseng S-Y, Wang H-Y. A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications. Energies. 2013; 6(2):1068-1100.

Chicago/Turabian Style

Tseng, Sheng-Yu; Wang, Hung-Yuan. 2013. "A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications." Energies 6, no. 2: 1068-1100.


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