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Soft-Computing Model-Based Controllers for Increased Photovoltaic Plant Efficiencies

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4 Author(s)
Varnham, A. ; Energy Res. Inst., Riyadh ; Al-Ibrahim, A.M. ; Virk, G.S. ; Azzi, D.

Improved solar cell models and control methods using synergies of soft-computing techniques are used to demonstrate increased energy efficiencies of photovoltaic (PV) power plants connected to the electricity grid via space-vector-modulated three-phase inverters. The models and control strategies are combined to form two new model-based controllers that are more accurate and resilient than existing solutions resulting in increased power production. A radial-basis-function-network (RBFN) model with a neuro-fuzzy regulator applied to a plant well characterized by the conventional solar cell model provided an estimated 1.5% increase in power production over an existing conventional model proportional integral (PI)-regulator combination. A neuro-fuzzy model with a neuro-fuzzy controller applied to a plant poorly characterized by the conventional solar cell model gave an 8.6% increase in power. An analysis of the net contributions to the increased efficiencies shows that the improved models had the most effect on power gains.

Published in:

Energy Conversion, IEEE Transactions on  (Volume:22 ,  Issue: 4 )

Date of Publication:

Dec. 2007

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