Debashisha Jena, Vanjari Venkata Ramana

An Accurate Modeling of Photovoltaic System for Uniform and Non-Uniform Irradiance

Efficient modeling and simulation of photovoltaic (PV) systems has become more important due to the wide integration of solar energy in modern power systems. The equations describing the PV systems are transcendental, non-linear in nature, resulting in a slow and inefficient simulations for long-term analysis. This paper proposes a modified approach of modeling photovoltaic array for uniform and non-uniform irradiance condition. Initially for uniform irradiance condition, single diode model is used as equivalent circuit. An approach based on adaptively varying the value of series resistance is proposed to find the equivalent circuit parameters. The proposed model is simulated using MATLAB and results are validated with the experimental results obtained from the datasheet values and other models in the literature. The model is extended for non-uniform irradiance and the results are validated. The proposed model is more effective by adaptively varying the value of series resistance in order to decrease the computational burden and increase the level of accuracy.

Keywords:

Modeling; uniform irradiance; non-uniform irradiance; photovoltaic (PV) array,

PDF

___

Villalva, M. G., and Gazoli, J. R., “Comprehensive
approach to modeling and simulation of photovoltaic arrays,” IEEE Transactions on Power Electronics, vol. 24, no. 5, pp. 1198-1208, 2009.
Xiao, W., Edwin, F. F., Spagnuolo, G., and Jatskevich,
J., “Efficient approaches for modelling and simulating photovoltaic power systems,” IEEE Journal of Photovoltaics, vol. 3, no.1, pp. 500-508, 2013.
Xiao, W., Dunford, W. G., and Capel, A., “A novel modeling method for photovoltaic cells,” IEEE 35th Annual Power Electronics Specialists Conference, vol. 3, pp. 1950-1956, 2004.
Sera, D., Teodorescu, R., and Rodriguez, P., “PV panel model based on datasheet values” IEEE International Symposium on Industrial Electronics, pp. 2392-239 6, 2007.
Chatterjee, A., Keyhani, A., and Kapoor, D., “Identification of photovoltaic source models,” IEEE Transactions on Energy Conversion, vol. 26, no.3, pp.883-889, 2011.
Ishaque, K., Salam, Z., and Taheri, H., “Simple, fast and accurate two-diode model for photovoltaic modules,” J. Solar Energy Materials and Solar Cells, vol. 95, no. 2, pp. 586-594, 2011.
Walker, G., “Evaluating MPPT converter topologies using a MATLAB PV model.” Journal of Electrical and Electronics Engineering, Australia, vol. 21, no.1, pp. 49-55, 2001.
Ding, K., Bian, X., Liu, H., and Peng, T., “A MATLAB- simulink-based PV module model and its application under conditions of non-uniform irradiance,” IEEE Transactions on Energy Conversion, vol. 27, no.4, pp. 864-872, 2012.
Ishaque, K., Salam, Z., and Taheri, H., “Modeling and simulation of photovoltaic (PV) system during partial shading based on a two-diode model,” J. Simulation Modelling Practice and Theory, vol. 19, no.7, pp. 1613- 1626, 2011.
Petrone, G., Spagnuolo, G., and Vitelli, M., “Analytical model of mismatched photovoltaic fields by means of Lambert W-function,” J. Solar energy materials and solar cells, vol. 91, no. 18, pp. 1652-1657, 2007.
Petrone, G., and Ramos -Paja, C. A., “Modeling of photovoltaic fields in mismatched conditions for energy yield evaluations.” J. Electric Power Systems Research, vol. 81, no. 4, pp. 1003-1013, 2011.
Bastidas, J. D., Franco, E., Petrone, G., Ramos -Paja, C.
A., and Spagnuolo, G., “A model of photovoltaic fields in mismatching conditions featuring an improved calculation speed.” J. Electric Power Research, vol. 96, pp. 81-90, 2013. Systems
KC200GT High Efficiency Multicrystal Photovoltaic Module Datasheet Kyocera. [Online]. Available : http://www.kyocera.com.sg/products/ pdf/kc200gt.pdf solar/
Shell Solar Product Information Sheet [Online ]. Available: solarcellsales.com/techinfo/technical_docs.cfm. http://www.
Sunmodule Plus 235 watt poly data sheet [Online ]. Available: usa.com/systemdesginers.../sunmodule-solar-panel- 235-poly-ds.pdf. www.solarworld
Siemens Solar Module SM55 Product Informatio n Sheet [Online]. Available: http://www.solarquest.com/microsolar/suppliers/sieme ns/sm55.pdf.
Syafaruddin, Karatepe, E., and Hiyama, T., “Development of real-time simulator based on intelligent techniques for maximu m controller of photovoltaic system,” International journal of innovative computing information and control, vol. 6, no.4, pp. 1623-1642, 2010.
Patel, H., and Agarwal, V., “MATLAB-based modelin g to study the effects of partial shading on PV array characteristics,” IEEE Transactions on Energy Conversion, vol. 23, no.1, pp. 302-310, 2008.