Grid-Connected Photovoltaic System: System Overview and Sizing Principles

The optimal size of a photovoltaic (PV) array is considered a critical factor in designing an efficient PV system due to the dependence of the PV cell performance on temperature. A high temperature can lead to voltage losses of solar panels, whereas a low temperature can cause voltage overproduction. There are two possible scenarios of the inverter’s operation in which they are associated with the erroneous calculations of the number of PV panels: 1) If the number of the panels is scant and the temperature is high, the minimum voltage required to operate the inverter will not be reached. As a result, the inverter will shut down. 2) Comparably, if the number of panels is excessive and the temperature is low, the produced voltage will be more than the maximum limit of the inverter which can cause the inverter to get disconnected or even damaged. This article aims to assess theoretical and practical methodologies to calculate size and determine the topology of a PV array. The results are validated by applying an experimental evaluation for a 100 kW Grid-connected PV system for a location in Halifax, Nova Scotia and achieving a satisfactory system performance compared to the previous work done.





References:
[1] B. S. Kumar and K. Sudhakar, “Performance evaluation of 10 MW grid connected solar photovoltaic power plant in India,” Energy Reports, vol. 1, pp. 184–192, 2015.
[2] S. Kouro, J. I. Leon, D. Vinnikov, and L. G. Franquelo, “Grid-Connected Photovoltaic Systems: An Overview of Recent Research and Emerging PV Converter Technology,” IEEE Industrial Electronics Magazine, vol. 9, no. 1, pp. 47–61, 2015.
[3] S. Pukhrem, “The investigation into algorithm of Photovoltaic Array Maximum Power Point Tracking”, M. S. thesis, Wrocław Univeristy of Technology, Poland,2013
[4] R. AbdelHady, "Modeling and simulation of a micro grid-connected solar PV system", Water Science, vol. 31, no. 1, pp. 1-10, 2017.
[5] Z. Cen, “Modeling and Simulation for an 8 kW Three-Phase Grid-Connected Photo-Voltaic Power System,” Open Physics, vol. 15, no. 1, pp. 603–612, 2017.
[6] O. Mohammed Benaissa, S. Hadjeri and S. Zidi, "Modeling and Simulation of Grid Connected PV Generation System Using Matlab/Simulink", International Journal of Power Electronics and Drive Systems (IJPEDS), vol. 8, no. 1, p. 392, 2017.
[7] M. Kesraoui, A. Lazizi and A. Chaib, "Grid Connected Solar PV System: Modeling, Simulation and Experimental Tests", Energy Procedia, vol. 95, pp. 181-188, 2016.
[8] N. Kumar, M. Kumar, P. Rejoice and M. Mathew, "Performance analysis of 100 kWp grid connected Si-poly photovoltaic system using PVsyst simulation tool", Energy Procedia, vol. 117, pp. 180-189, 2017.
[9] Y. Yağan , K. Vardar and M. Ebeo, ‟Modeling and Simulation of PV Systems”, IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE), vol. 13, pp. 1-11, 2018.
[10] E. Salilih and Y. Birhane, "Modeling and Analysis of Photo-Voltaic Solar Panel under Constant Electric Load", Journal of Renewable Energy, vol. 2019, pp. 1-10, 2019.
[11] Vinod, R. Kumar and S. Singh, "Solar photovoltaic modeling and simulation: As a renewable energy solution", Energy Reports, vol. 4, pp. 701-712, 2018.
[12] M. A. G. D. Brito, L. P. Sampaio, G. Luigi, G. A. E. Melo, and C. A. Canesin, “Comparative analysis of MPPT techniques for PV applications,” 2011 International Conference on Clean Electrical Power (ICCEP), 2011.
[13] Z. Cen, "An Ultrafast Maximum Power Point Setting Scheme for Photovoltaic Arrays Using Model Parameter Identification", International Journal of Photoenergy, vol. 2015, pp. 1-10, 2015.
[14] A. Deswal and V.K.Garg,”Voltage Source Converter (VSC) Control of Grid Connected PV System,” Advanced Research in Electrical and Electronic Engineering, vol. 3, pp. 257-259, 2016.
[15] K. Dubey and M. Shah, “Design and simulation of Solar PV system,” 2016 International Conference on Automatic Control and Dynamic Optimization Techniques (ICACDOT), 2016.
[16] L. A. Kosyachenko, Solar cells: thin-film technologies. Rijeka: InTech, 2011.
[17] M. Chegaar, A. Hamzaoui, A. Namoda, P. Petit, M. Aillerie, and A. Herguth, “Effect of Illumination Intensity on Solar Cells Parameters,” Energy Procedia, vol. 36, pp. 722–729, 2013.
[18] P. Singh and N. Ravindra, “Temperature dependence of solar cell performance—an analysis,” Solar Energy Materials and Solar Cells, vol. 101, pp. 36–45, 2012.
[19] E. A. franklin, “Calculations for a Grid-Connected Solar Energy System,” Extension.arizona.edu, 2020. (Online). Available: https://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1782-2019.pdf.
[20] J. Alfsen, "How to Calculate PV String Size — Mayfield Renewables," Mayfield Renewables, 2020. (Online). Available: https://www.mayfield.energy/blog/pv-string-size