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Open AccessArticle

A Multistage DC-DC Step-Up Self-Balanced and Magnetic Component-Free Converter for Photovoltaic Applications: Hardware Implementation

1
Department of Electrical and Electronics Engineering, University of Johannesburg, PO Box 524, Auckland Park, Johannesburg 2006, South Africa
2
Centre for Reliable Power Electronics (CORPE), Department of Energy Technology, Aalborg University, 9000 Aalborg, Denmark
*
Author to whom correspondence should be addressed.
Academic Editor: Tapas Mallick
Energies 2017, 10(5), 719; https://doi.org/10.3390/en10050719
Received: 24 December 2016 / Revised: 15 May 2017 / Accepted: 15 May 2017 / Published: 18 May 2017
This article presents a self-balanced multistage DC-DC step-up converter for photovoltaic applications. The proposed converter topology is designed for unidirectional power transfer and provides a doable solution for photovoltaic applications where voltage is required to be stepped up without magnetic components (transformer-less and inductor-less). The output voltage obtained from renewable sources will be low and must be stepped up by using a DC-DC converter for photovoltaic applications. 2 K diodes and 2 K capacitors along with two semiconductor control switch are used in the K-stage proposed converter to obtain an output voltage which is (K + 1) times the input voltage. The conspicuous features of proposed topology are: (i) magnetic component free (transformer-less and inductor-less); (ii) continuous input current; (iii) low voltage rating semiconductor devices and capacitors; (iv) modularity; (v) easy to add a higher number of levels to increase voltage gain; (vi) only two control switches with alternating operation and simple control. The proposed converter is compared with recently described existing transformer-less and inductor-less power converters in term of voltage gain, number of devices and cost. The application of the proposed circuit is discussed in detail. The proposed converter has been designed with a rated power of 60 W, input voltage is 24 V, output voltage is 100 V and switching frequency is 100 kHz. The performance of the converter is verified through experimental and simulation results. View Full-Text
Keywords: DC-DC converter; self-biased; magnetic component free; multistage; step-up; photovoltaic application DC-DC converter; self-biased; magnetic component free; multistage; step-up; photovoltaic application
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MDPI and ACS Style

Bhaskar, M.S.; Padmanaban, S.; Blaabjerg, F. A Multistage DC-DC Step-Up Self-Balanced and Magnetic Component-Free Converter for Photovoltaic Applications: Hardware Implementation. Energies 2017, 10, 719. https://doi.org/10.3390/en10050719

AMA Style

Bhaskar MS, Padmanaban S, Blaabjerg F. A Multistage DC-DC Step-Up Self-Balanced and Magnetic Component-Free Converter for Photovoltaic Applications: Hardware Implementation. Energies. 2017; 10(5):719. https://doi.org/10.3390/en10050719

Chicago/Turabian Style

Bhaskar, Mahajan S.; Padmanaban, Sanjeevikumar; Blaabjerg, Frede. 2017. "A Multistage DC-DC Step-Up Self-Balanced and Magnetic Component-Free Converter for Photovoltaic Applications: Hardware Implementation" Energies 10, no. 5: 719. https://doi.org/10.3390/en10050719

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