PV SYSTEM UNDER PARTIAL SHADING CONDITION TO IMPROVE THE GENERATING POWER BY USING SINGLE SENSOR BASED MPPT
Author’s Name : M Manickaraj | K Ramamoorthi
Volume 05 Issue 01 Year 2018 ISSN No: 2349-2503 Page no: 5-7
Power processing converters and voltage equalizers have been proposed and used for photovoltaic (PV) string comprising multiple modules/substrings connected in series in order to preclude negative influences of partial shading in differential method. The single-switch voltage equalizer using multi-stacked special converters can significantly reduce the necessary switch count compared to that of conventional topologies, achieving simplified circuitry. However, multiple current sensors are necessary for this single-switch equalizer to effectively perform equalization. In this paper, a current Sensorless equalization technique (?V-controlled equalization) is presented. The equalization strategy using the ?V-controlled equalization is explained and discussed on the basis of comparison with current-controlled equalization strategies for improved the output power. Experimental equalization tests emulating partial-shading conditions were performed using the single- sensor based mppt and its equalizer employing the ?V-controlled equalization. Negative impacts of partial-shading were successfully precluded, demonstrating the efficacy of the proposed special converters is used.
Photovoltaic Modules, Special Converters , Sensors, and So on
- T. Shimizu, O, Hashimoto, and G. Kimura, “A novel high-performance utility-interactive photovoltaic inverter system,” IEEE Trans. Power Electron., vol. 18, no. 2, pp. 704–711, Mar. 2003.
- R. Giral, C. A. R. Paja, D. Gonzalez, J. Calvente, À. C. Pastpr, and L. M. Salamero, “Minimizing the effects of shadowing in a PV module by means of active voltage sharing,” in Proc. IEEE Int. Conf. Ind. Technol, pp. 943–948, 2010.
- R. Kadri, J. P. Gaubert, and G. Champenois, “Centralized MPPT with string current diverter for solving the series connection problem in photovoltaic power generation system,” in Proc. Int. Conf. Power Eng. Energy Electrical Drives, pp. 116–123, 2011.
- C. Olalla, M. Rodríguez, D. Clement, J. Wang, and D. Makisimovic, “Architecture and control of PV modules with submodule integrated converter,” in Proc. IEEE Control and Modeling for Power Electron., pp. 1–6, 2012.
- S. B. Yaakov, A. Blumenfeld, A. Cervera, and M. Evzelman, “Design and evaluation of a modular resonant switched capacitor equalizer for PV panels,” in Proc. IEEE Energy Conversion Cong. Expo., pp. 4129–4136, 2012.
- Jingying Hu, Anthony D. Sagneri, Juan M. Rivas, Yehui Han, Seth M. Davis and David J. Perreault, “High-frequency resonant SEPIC converter with wide input and output voltage ranges”, IEEE Transactions on Power Electronics, Vol. 27, No.1, pp. 189-200, 2012.
- P. S. Shenoy, K. A. Kim, B. B. Johnson, and P. T. Krein, “Differential power processing for increased energy production and reliability of photovoltaic systems,” IEEE Trans. Ind. Power Electron., vol. 28, no. 6, pp. 2968–2979, Jun. 2013.
- S. Qin, S. T. Cady, A. D. D. García, and R. C. N. P. Podgurski, “A distributed approach to MPPT for PV sub-module differential power processing,” in Proc. IEEE Energy Conversion Conf. Expo., pp. 2778–2785, 2013.
- S. Qin and R. C. N. P. Podgurski, “Sub-module differential power processing for photovoltaic applications,” in Proc. IEEE Applied Power Electron. Conf. Expo., pp. 101–108, 2013.
- M.Vitelli, “On the necessity of joint adoption of both distributed maximum power point tracking and central maximum power point tracking in PV systems,” Prog. Photovoltaic Res. Appl., vol. 22, pp. 283–299, 2014.
- L. F. L. Villa, X. Pichon, F. S. Ardelibi, B. Raison, J. C. Crebier, and A. Labonne, “Toward the design of control algorithms for a photovoltaic equalizer: choosing the optimal switching strategy and the duty cycle,” IEEE Power Electron., vol. 29, no. 3, pp. 1447–1460, Mar. 2014.
- R. Sangwan, K. Kesarwani, and J. T. Stauth, “High-density power converters for sub-module photovoltaic power management,” in Proc. IEEE Energy Conversion Cong. Expo., pp. 3279–3286, 2014.
- Hiren Patel and Vivek Agarwal, “Maximum power point tracking scheme for PV systems operating under partial shaded conditions,” IEEE transactions on Industrial Electronics, Vol. 55, No. 4, pp. 1689-1698, 2008.
- M. Uno and A. Kukita, “Single-switch voltage equalizer using multi-stacked buck-boost converters for partially-shaded photovoltaic modules,” IEEE Trans. Power Electron., vol. 30, no. 6, Jun. 2015, pp. 3091–3105.
- M. Uno and A. Kukita, “Current sensorless single-switch voltage equalizer using multi-stacked buck-boost converters for photovoltaic modules under partial shading,” in Proc. IEEE Int. Conf. Power Electron. (ICPE), ECCE-Asia, pp. 1889–1896, Jun. 2015.
- S. Poshtkouhi, V. Palaniappan, M. Fard, and O. Trescases, “A general approach for quantifying the benefit of distributed power electronics for fine grained MPPT in photovoltaic applications using 3-D modeling,” IEEE Trans. Power Electron., vol. 27, no. 11, pp. 4656–4666, Nov. 2012.
- H. J. Bergveld, D. Büthker, C. Castello, T. Doorn, A. D. Jong, R. V. Otten, and K. D. Waal, “Module-level dc/dc conversion for photovoltaic systems: the delta-conversion concept,” IEEE Trans. Power Electron., vol. 28, no. 4, pp. 2005–2013, Apr. 2013.
- M. S. Zaman, Y. Wen, R. Fernandes, B. Buter, T. Doorn, M. Dijkstra, H. J. Bergveld, and O. Trescases, “A cell-level differential power processing IC for concentrating-PV systems with bidirectional hysteretic current-mode control and closed-loop frequency regulation,” IEEE Trans. Power Electron., vol. 28, no. 6, pp. 2936–2945, Jun. 2013.
- R. Kadri, J. P. Gaubert, and G. Champenois, “New converter topology to improve performance of photovoltaic power generation system under shading conditions,” in Proc. Int. Conf. Power Eng. Energy Electrical Drives, pp. 1–7, 2011.
- L. F. L. Villa, T. P. Ho, J. C. Crebier, and B. Raison, “A power electronics equalizer application for partially shaded photovoltaic modules,” IEEE Trans. Ind. Electron., vol. 60, no. 3, pp. 1179–1190, Mar. 2013.