Comparative Experimental Performance Study of Four Fixed Photovoltaic Subfields Under Saharan Climate: A Case Study in Oued-Nechou, Ghardaïa
Keywords:
Production Photovoltaic, Comparative Study, Experimental Simulation, Fixed Subfields, Output Power, Real Time Measurement, Power Augmentation, Meteorological data .Abstract
An experimental study at a 1.1 MWp photovoltaic plant in Oued-Nechou, Ghardaïa, evaluated the performance of four fixed 100 kWp subfields using crystalline silicon (mc-Si, pc- Si) and thin-film (a-Si, CdTe) technologies. Data were collected over four days, each representing a different season, to assess peak output, total power generation, and long-term performance under various meteorological conditions. The a-Si subfield exhibited the highest overall power output during the study, with a peak of 99.98 kW on May 1st , nearing its optimal capacity and marking the highest output in 2016. On the same day, peak outputs for the other subfields were recorded as follows: CdTe at 96.67 kW, mc-Si at 95.67 kW, and pc-Si at 84.06 kW. Over four days, the daily average power output from sunrise to sunset revealed that the mc-Si subfield had the highest average output at 47.06 kW, while the pc-Si subfield recorded a lower average of 39.46 kW.
Furthermore, performance evaluation based on augmentation percentages for mean output power revealed that the amorphous silicon (a-Si) subfield consistently outperformed the other technologies. On July 1st, the a-Si subfield recorded a significant power gain of 19.250% compared to the polycrystalline silicon (pc-Si) subfield. On October 1st , it showed a similar gain of 19.206% over the pc-Si subfield. Moreover, Real-time data, collected at four-minute intervals, was used to assess the impact of key meteorological parameters such as solar irradiance, modeled irradiance, ambient and module temperatures, wind speed, and relative humidity on the daily power output of photovoltaic subfields. The analysis revealed a strong positive correlation between power generation, sunshine duration, and light intensity. Longer hours of sunshine and higher light intensity were found to enhance power output.
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