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Energy and environmental performance analysis of grid-connected photovoltaic systems under similar outdoor conditions in the Saharan environment

Deriche Mohammed Amine, Hafaifa Ahmed, Tahri Ali, Mohammedi Kamal, Tahri Fatima

Diagnostyka

2020

Vol. 21, No. 2

13--23

The aim of this paper is to present a one-year performance analysis of four grid-connected PV systems installed at Ghardaia city in Algeria’s Sahara. The grid-connected PV systems are based on four different PV module technologies which are: monocrystalline silicon (m-Si), multi-crystalline silicon (mc-Si), cadmium telluride (Cd-Te) and amorphous (a-Si) PV module technologies. The PV systems based on the thin film technologies have their performance ratio better throughout the year when the performance ratio of the mc-Si technology is better in the winter season. The a-Si PV system has its performance ratio about 6.13 % more better than mc-Si and 8.90 % better than m-Si. The AC energy produced with the a-Si PV system is 13.32 % more than what the mc-Si system produces. It was found that the a-Si PV system performs better than the other technologies under the Saharan climate conditions of Ghardaia city. The energy payback time (EPBT) and greenhouse gases (GHG) emissions of the different PV systems were analyzed. The EPBT and GHG emissions per year, vary from a minimum value of 2.8 years to a maximum value of 5.73 years and from 13.24 tons to 32.03 tons of CO2/kWh for CdTe and m-Si respectively. The CdTe PV system performs better in terms of EPBT and GHG emissions compared to the other technologies (m-Si, mc-Si and a-Si) due to its low life cycle energy requirement.

Reducing mismatch losses in grid-connected PV systems by the means of alternative array topologies

Picault D., Raison B., Bacha S., Aguilera J., de la Casa J.

Przegląd Elektrotechniczny

2010

R. 86, nr 11a

1-6

Partial shading of photovoltaic (PV) modules can affect a wide variety of plants ranging from utility-sized solar trackers to residential building-integrated PV, resulting in lower energy production yields. The traditional series-parallel interconnection scheme of solar arrays is sensitive to disparate solar irradiation levels on modules of the plant. By using alternative topologies, the effects of unavoidable partial shade can be decreased as will be shown through experimental and simulation results.

Częściowe zacienienie modułów fotowoltaicznych (PV) dotyczą systemów różnej wielkości, począwszy od przemysłowych układów śledzących a skończywszy na domowych układach PV, co powoduje obniżenie wydajności produkcji energii. Tradycyjne systemy szeregoworównoległe połączenia ogniw słonecznych jest wrażliwy na zróżnicowane poziomy napromieniowania słonecznego modułów. Przez zastosowanie zmiennych topologii, skutki nieuniknionego zacienienia można zmniejszyć jak to zostanie wykazane poprzez eksperymenty i wyniki symulacji.