MODIFIED HIGH STEP-UP COUPLED INDUCTOR BASED DC-DC CONVERTER FOR PV APPLICATIONS

Year 2016, Volume: 29 Issue: 4, 981 - 986, 20.12.2016

N Ramesh Babu , S. Saravanan

Abstract

A modified high voltage gain dc-dc converter with improved efficiency has been proposed in this article for PV based applications. In the proposed methodology, converter is integrated with a switched capacitor and a switched coupled inductor. This converter topology provides high voltage gain with fewer components. The efficient power conversion has been achieved with low switching voltage across the semiconductor devices. The working principle and analysis of the converter is described in this article. The converter design is made for 250-W power rating system. Performance of the proposed converter is analysed and validated the efficiency at various loading conditions.

Keywords

dc-dc converter, high voltage gain; switched capacitor; coupled inductor; switching voltage; photovoltaic

References

• Saravanan, S. and Babu, N.R. “Maximum power point tracking algorithms for photovoltaic system – A review,” Renew.& Sustain. Energy Rev., vol. 57, pp. 192-204. (2016).
• Ramji Tiwari, and Babu, N.R, "Fuzzy Logic Based MPPT for Permanent Magnet Synchronous Generator in wind Energy Conversion System", IFAC-PapersOnLine, vol. 49, no. 1, pp. 462-467, (2016).
• Saravanan, S. and Babu, N.R, “Performance analysis of boost and cuk converter in MPPT based PV system,” In: Proceedings of the Inter Conference on Circuit, Power and Comput Technol, pp. 1-6, (2015).
• Li, Y., Vilathgamuwa, D.M. and Loh P.C. “Design, analysis, and realtime testing of a controller for multibus microgrid system,” IEEE Trans. Power Electron., vol. 19, no. 5, pp. 1195-1204, (2004).
• Timbus, A., Liserre, M., Teodorescu, R., Rodriguez, P., and Blaabjerg, F. “Evaluation of current controllers for distributed power generation systems,” IEEE Trans. Power Electron., vol. 24, no. 3, pp. 654–664, (2009).
• Mohamed, Y.A-R.I. and El Saadany, E. F. “Adaptive decentralized droop controller to preserve power sharing stability of paralleled inverters in distributed generation microgrids,” IEEE Trans. Power Electron., vol. 23, no. 6 , pp. 2806–2816, (2008).
• Sivakumar, P., Kader, A.A., Kaliavaradhan, Y., and Arutchelvi, M. “Analysis and enhancement of PV efficiency with incremental conductance MPPT technique under non-linear loading conditions,” Renew. Energy, vol. 81, pp. 543-550, (2015).
• Kofinas, P., Dounis, Al., Papadakis, G., and Assimakopoulos, M.N. “An intelligent MPPT controller based on direct neural control for partially shaded PV system,” Energy and Build. vol. 90, pp. 51-64, (2015).
• Qi, J., Zhang, Y., and Chen, Y. “Modeling and maximum power point tracking (MPPT) method for PV array under partial shade conditions,” Renew. Energy. vol. 66, pp. 337-345, (2014).
• Wai, R.J., Lin, C.Y., Duan, R.Y., and Chang, Y.R. “High efficiency power conversion system for kilowatt-level stand-alone generation unit with low input voltage,” IEEE Trans. Ind. Electron., vol. 55, no. 10, pp. 3702–3714, (2008).
• Saravanan, S. and Babu, N.R. “RBFN based MPPT algorithm for PV system with high step up converter,” Energy Convers. and Manag., vol. 122, pp. 239-251, (2016).
• Gules. R., dos Santos, W.M., dos Reis, F.A. Romaneli, E.F.R., and Badin, A.A. “A Modified SEPIC converter with high static gain for renewable applications,” IEEE Trans. Power Electron., vol. 29, no. 11, pp. 5860–5871, (2014).
• Sabzali, A.J., Ismail, E.H., and Behbehani, M. “High voltage step-up integrated double Boost-Sepic DC-DC converter for fuel-cell and photovoltaic applications,” Renew. Energy, vol. 82, pp. 44-53, (2015).
• Carr, J.A., Hotz, D., Balda, J.C., Mantooth, H.A., Ong, A., and Agarwal, A. “Assessing the impact of SiC MOSFETs on converter interfaces for distributed energy resources,” IEEE Trans. Power Electron., vol. 24, no. 1, pp. 260–270, (2009).
• Lin, B.R. and Hsieh, F.Y. “Soft-switching zeta–flyback converter with a buck–boost type of active clamp,” IEEE Trans. Ind. Electron., vol. 54, no. 5, pp. 2813–2822, (2007).
• Wu, T.F., Lai, Y.S., Hung, J.C., and Chen, Y.M. “Boost converter with coupled inductors and buck–boost type of active clamp,” IEEE Trans. Ind. Electron., vol. 55, no. 1, pp. 154–162, (2008).
• Wai, R.J., Liu, L.W., and Duan, R.Y. “High-efficiency voltage-clamped dc–dc converter with reduced reverse-recovery current and switch voltage stress,” IEEE Trans. Ind. Electron., vol. 53, no. 1, pp. 272–280, (2006).
• Zhao, Q., and Lee, F.C. “High-efficiency, high step-up DC–DC converters,” IEEE Trans. Power Electron., vol. 18, no. 1, pp. 65–73, (2003).
• Chen, S.M., Lao, M.L., Hsieh, Y.H., Liang, T.J., and Chen, K.H. “A Novel Switched –Coupled-Inductor DC-DC Step-Up converter and Its Derivatives,” IEEE Trans. Ind. App., vol. 51, no. 1, pp. 309-314, (2015).
• Chen, Z., Zhou, Q., and Xu, J., “Coupled-inductor boost integrated flyback converter with hig-voltage gain and ripple-free input current,” IET Power Electron., vol. 8, no. 2, pp. 213-220, (2015).
• Ajami, A., Ardi, H., and Farakhor, A. “A Novel High Step-up DC/DC Converter Based on Integrating Coupled Inductor and Switched-Capacitor Techniques for Renewable Energy Applications,” IEEE Trans. Power Electron, vol. 30, no. 8, pp. 4255–4263, (2015).
• Aquino, R.N.A.L.S., Tofoli, F.L., Praca, P.P., Jr, D.S.O., and Barreto, L.H.S.C. “Soft switching high-voltage gain dc-dc interleaved boost converter,” IET Power Electron, vol. 8, no. 1, pp. 120-129, (2015).