Photovoltaic system under uneven light condition and variable load with modified incremental resistance algorithm
Keywords:Global MPPTS, Local MPPTS, Uneven Lighting Conditions (ULCS), Incremental Resistance (INR), Photovoltaic.
On scrutinizing Power vs. Voltage curves of P_V arrays which receives non-uniform insolation of light or simply during uneven lighting conditions (ULCs) multiple LMPPTs are exhibited. Conventional MPPT methods are efficient under normal conditions even though they failed to identify the GMPPTs from LMPPTs under ULCs. To improve the productivity of Maximum power point tracking method for P_V arrays under both ULCs and normal conditions some modifications are tried in this paper. The Incremental-resistance method added with some alterations enables to track the LMPPTs as well as GMPPTs very effectively and accurately with fewer numbers of steps. In proposed system losses during GMPP, tracking is minimized under ULCs. Simulation is performed in Mat lab.
 Faicel El Aamri, Hattab Maker and Dezso Sera "A Direct Maximum Power Point Tracking Method for Single-Phase Grid-Connected PV Inverters" IEEE Trans on Power Electronics, Vol:1, no.99, August 2017.
 Bader N. Alajmi, Khaled H. Ahmed, Stephen J. Finney, and Barry W. Williams "A Maximum Power Point Tracking Technique for Partially Shaded Photovoltaic Systems in Microgrids" IEEE Trans on Industrial Electronics, vol. 60, no. 4, pp. 1596-1606, April 2013.
 Mohammed A. Elgendy, Bashar Zahawiand David J. Atkinson "Assessment of the Incremental_Conductance Maximum Power_ Point Tracking Algorithm," IEEE Trans on Sustainable Energy, Vol. 4, No. 1, PP 108-118 January 2013.
 Azadeh Safari and SaadMekhilef, "Simulation And
Hardware Implementation of Incremental _Conductance MPPT with Direct Control Method Using Cuk _Converter," IEEE Trans on Industrial Electronics, VOL. 58, NO. Four, pp.1154-1161, April 2011
 Christos Konstantopoulos and EftichiosKoutroulis, "Global Maximum _Power Point Tracking Of Flexible Photo_voltaic Modules," IEEE Trans On Power Electronics, Vol. 29, No. 6, pp 2817 June 2014
 T. Esram and P. L. Chapman, "Comparison of photovoltaic_arraymaximum_power_point tracking techniques," IEEE Trans. Energy Convers., vol. 22, no. 2, pp. 439â€“449, June 2007.
 Guan-Chyun Hsieh, Hung-I Hsieh and Cheng-Yuan Tsai, "Photovoltaic Power-Increment-Aided Incremental-Conductance MPPT With Two-Phased Tracking" IEEE Transactions on Power Electronics", Vol.28, no.6, pp. 2895 â€“ 2911, June 2013.
 N. Femia, G. Petroneand G. Spagnuolo "Optimization of perturbing and observe maximum power point tracking method" IEEE Trans on Power Electronics Vol 20, no. 4, pp. 963 â€“ 973, July 2005.
 Sathish Kumar Kollimalla and Mahesh Kumar Mishra "A Novel Adaptive P&O MPPT Algorithm Considering Sudden Changes in the Irradiance" IEEE Transactions on Energy Conversion, vol: 29, no. 3, pp. 602 â€“ 610, Sept. 2014.
 Jinhua Liu, Junyin Li, Jianan Wu a Wenhui Zhou "Global MPPT algorithm with coordinated control of PSO and INC for rooftop PV array" The Journal of Engineering, Issue: 13, pp. 778 â€“ 782 August 2017.
 Hiren Patel and Vivek Agarwal "Maximum Power Point Tracking Scheme for PV Systems Operating under Partially Shaded Conditions" IEEE Transactions on Industrial Electronics vol: 55, Issue 4, pp. 1689 â€“ 1698 April 2008.
 Tat Luat Nguyen and Kay-Soon Low, "A Global Maximum Power Point Tracking Scheme Employing DIRECT Search Algorithm for Photovoltaic Systems" IEEE Trans On Industrial-Electronics, Vol. 57, No. 10, pp. 3456-3467, October 2010Alireza Ramyar, Hossein Iman-Eini, and Shahrokh Farhangi "Global Maximum_ Power_ Point Tracking Method For Photovoltaic Arrays UnderPartial Shading Conditions," IEEE Trans On Industrial Electronics, vol.61, no.6, pp. 239â€“ 249, Nov 2016