Usually, manufacturers provide PV panels, accompanied with data measured under Standard Test Conditions (STC), i.e. determined at AM1.5 with an irradiance of 1000W/m2 and a cell temperature equal to 25 C. In fact, these conditions do not reflect the reality of natural operation of PV panel conditions and these functional data associated with the real panel operating point may vary from one environment to another due to the change in weather conditions. The characterization of different types of PV panels under natural conditions of operation is, therefore, necessary in order to have a global view about the true electrical performance of different technologies at a given site. This work evaluates the influence of climatic conditions on the behavior of QS-60DGF module which has been installed at the Unit of Research in Renewable energy URERMS Adrar in the southern Algeria. The degradation evaluation of QS-60DGF module with different defects was performed, using (I-V/P-V) characteristics under daily weather conditions and the the visual inspection such as glass breakag. This study is to investigate the degradation rates of a-Si PV module after more than one year of outdoor exposure in desert conditions.
Photovoltaic modules operate under a large range of conditions. This combined with the fact that manufacturers provide electrical parameters at specific conditions (STC). The present study proposes a comparison between single and double diode models of solar PV system and ensures the best suited model under specific environmental condition for accurate performance prediction. An important feature of these models is that its parameters can be determined using data commonly provided by module manufacturers on their published datasheets. Accurate determination of these parameters which arose from a diversification of models and methods dedicated to their estimations is still a challenge for researchers. In this paper the single and two diode models have been studied by mathematical methods based on simulated Newton-Raphson iteration method. Newton-Raphson iteration method is solved by MATLAB simulation.
Algeria has one of the highest solar deposits in the world, the average duration of sunshine in the Algerian Sahara is 3500 hours, and this potential can be an important factor for sustainable development in this region, if it is exploited economical way. In this context, it should be noted that the city of Adrar is located in the region of the "solar belt", which enjoys abundant sunshine of more than 3000 hours of sunshine per year, based on data from Overall hourly irradiation on a horizontal surface, the Adrar region is distinguished by a higher average daily irradiation of up to 5.7 kWh/m2/day. In the present work, an operational performance analysis of a polycrystalline silicon photovoltaic system for one year is performed. The installed capacity of this system is 20 MW, and it is exposed in an arid climate in Adrar of southern Algeria.
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