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A New Closed Loop High Step Up DC-DC Converter for Photo Voltaic Application

Kalagotla Chenchireddy, Khammampati R Sreejyothi, V Kumar


Renewable Energy Resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. The renewable energy sources such as PV modules, fuel cells or energy storage devices such as super capacitors or batteries deliver output voltage at the range of around 15 to 40 VDC. A boost converter is used to clamp the voltage stresses of all the switches in the interleaved converters, caused by the leakage inductances present in the practical coupled inductors, to a low voltage level. This paper proposes a converter that employs a floating active switch to isolate energy from the PV panel when the ac module is OFF; this particular design protects installers and users from electrical hazards.            The proposed converter employs a Zeta converter and a coupled inductor, without the extreme duty ratios and high turn’s ratios generally needed for the coupled inductor to achieve high step-up voltage conversion; the leakage-inductor energy of the coupled inductor is efficiently recycled to the load. These features improve the energy-conversion efficiency. Overall performance of the renewable energy system is then affected by the efficiency of step-up DC/DC converters, which are the key parts in the system power chain. This paper presents a dc-dc power converter integrated in such a way to obtain, in a single conversion stage, the maximum energy extraction from photovoltaic panels, battery charging and discharging dynamic control, and high voltage step-up, also operating with soft-switching capability. This review is mainly focused on high efficiency step-up DC/DC converters with high voltage gain. The results are obtained through Matlab/Simulink software package.


DC-DC Converter, Photo Voltaic Cell, Renewable Energy Sources.

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Global Market Outlook for Photovoltaics Until 2014, Eur. Photovoltaic Ind. Assoc. (EPIA), Brussels, Belgium, May 2010. [Online]. Available: Outlook_for_Photovoltaics_until_2014.pdf

T. Shimizu, K. Wada, and N. Nakamura, “Flyback-type single-phase utility interactive inverter with power pulsation decoupling on the dc input for an ac photovoltaic module system,”IEEE Trans. Power Electron., vol. 21, no. 5, pp. 1264–1272, Jan. 2006.

C. Rodriguez and G. A. J. Amaratunga, “Long-lifetime power inverter for photovoltaic ac modules,”IEEE Trans. Ind. Electron., vol. 55, no. 7, pp. 2593–2601, Jul. 2008.

W. Li and X. He, “Review of non-isolated high step-up dc/dc converters in photovoltaic grid-connected applications,”IEEE Trans. Ind. Electron., vol. 58, no. 4, pp. 1239–1250, Apr. 2011.

S. B. Kjaer, J. K. Pedersen, and F. Blaabjerg, “A review of single-phase grid-connected inverters for photovoltaic modules,”IEEE Trans. Ind. Appl., vol. 41, no. 5, pp. 1292–1306, Sep./Oct. 2005.

B. Jablonska, A. L. Kooijman-van Dijk, H. F. Kaan, M. van Leeuwen, G. T. M. de Boer, and H. H. C. de Moor, “PV-prive paper at ECN, five years of experience with small-scale ac module PV systems,” inProc. 20th Eur. Photovoltaic Sol. Energy Conf., Barcelona, Spain, Jun. 2005, pp. 2728–2731.

J. J. Bzura, “The ac module: An overview and update on self-contained modular PV systems,” inProc. IEEE Power Eng. Soc. Gen. Meeting, Jul. 2010, pp. 1–3.

J. Falin, “Designing dc/dc converters based on ZETA topology,” Analog Appl. J., pp. 16–21, 2Q, 2010. [Online]. Available: http://focus.ti. com/lit/an/slyt372/slyt372.pdf

B. R. Lin and F. Y. Hsieh, “Soft-switching Zeta-flyback converter with a buck-boost type of active clamp,”IEEE Trans. Ind. Electron., vol. 54, no. 5, pp. 2813–2822, Oct. 2007.

T. B. Marchesan, M. A. Dalla-Costa, J. M. Alonso, and R. N. do Prado, “Integrated Zeta-flyback electronic ballast to supply high-intensity discharge lamps,”IEEE Trans. Ind. Electron., vol. 54, no. 5, pp. 2918–2921, Oct. 2007.

D. Murthy-Bellur and M. K. Kazimierczuk, “Two-transistor Zeta-flyback dc-dc converter with reduced transistor voltage stress,”Electron. Lett., vol. 46, no. 10, pp. 719–720, May 2010.

T. F. Wu, S. A. Liang, and Y. M. Chen, “Design optimization for asymmetrical ZVS PWM Zeta converter,”IEEE Trans. Aerosp. Electron. Syst., vol. 39, no. 2, pp. 521–532, Apr. 2003.

M. J. Bonato, F. T. Wakabayashi, and C. A. Canesin, “A novel voltage step-down/up ZCS-PWM Zeta converter,” inConf. Rec. IEEE IAS Annu. Meeting, 2000, pp. 2448–2454.

B. Axelrod, Y. Berkovich, S. Tapuchi, and A. Ioinovici, “Steep conversion ration ´ Cuk, Zeta, and sepic converters based on a switched coupled-inductor cell,” inProc. IEEE Power Electron. Spec. Conf., 2008, pp. 3009–3014.

B. Axelrod, Y. Berkovich, and A. Ioinovici, “Switched-capacitor/ switched-inductor structures for getting transformerless hybrid dc-dc PWM converters,”IEEE Trans. Circuits Syst. I, Reg. Papers, vol. 55, no. 2, pp. 687–696, Mar. 2008.



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