Estimation of steady state and dynamic parameters of low concentration photovoltaic system

The estimation of steady state and dynamic parameters is indispensable to extract maximum power from solar photovoltaic system. This article aims to extract steady state and dynamic parameters for a low-concentration photovoltaic system under actual test conditions. A theoretical model is reported to estimate dynamic resistance under varying concentration and temperature for low-concentration photovoltaic system. When the concentration ratio is changed from 1 sun to 5.17 suns the maximum power delivered by low-concentration photovoltaic system increased by threefold. The results show that the higher solar PV module temperature has negative impact on the open circuit voltage for a given concentration with negative temperature coefficient of approximate to -0.021 V/K. The observed dynamic resistance was in the range of 17.99 to 24.84 Omega for the low-concentration photovoltaic system under actual test conditions. (C) 2013 Elsevier B.V. All rights reserved.