Influence of Solar Radiation and Ambient Temperature on the Unit Yield of a Photovoltaic System

Sarniak, M.

doi:10.4028/www.scientific.net/amm.797.202

Cited by 3 publications

(7 citation statements)

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“…List of parameters and conditions of verification measurements with links to relevant drawing numbers with the results of verification tests. because the I-V characteristics are significantly deformed from the correct ones and the FF would be greatly underestimated [32]:…”

Section: Resultsmentioning

confidence: 99%

“…The quality of the modules under STC is determined by calculating the fill factor FF (3) of the I-V characteristic. In the case of partial shading, such an assessment would be unreliable, because the I-V characteristics are significantly deformed from the correct ones and the FF would be greatly underestimated [32]:…”

Section: Resultsmentioning

confidence: 99%

“…Formulas (5)-(7) [32] allow the calculation of the fundamental parameters of the I-V characteristics of the PV module for a specific temperature T M in relation to the value at 25 • C (in STC), given by the manufacturer (Table 1). These formulas are based on three temperature coefficients (α T , β T , and γ T ) from Table 1: Table 3.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The form of this model is non-linear and entangled, it can be solved only by means of simulation iterative calculations. The model resulting from the structure of the replacement circuit and its development are as follows [32,33]:…”

Section: Construction Of Simulation Model In Matlab Packagementioning

confidence: 99%

“…The proposed method of simulation of partial shading is different from those found in other publications [24][25][26] and allows quick and easy adaptation to any shading conditions. The issue of shading is also associated with the actual temperature distribution on the surface of PV panels [27,28]. Shaded parts generate an increase in the temperature of PV modules, and in critical situations, this leads to defects in the form of "Hot-Spots".…”

Section: Introductionmentioning

confidence: 99%

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Modeling the Functioning of the Half-Cells Photovoltaic Module under Partial Shading in the Matlab Package

Sarniak

2020

Applied Sciences

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In this paper, the usefulness of photovoltaic modules built of half cells for partially obstructed photovoltaic (PV) installations was analyzed based on verified simulation studies. The parameters of these modules are similar to the classic, but the internal structure is different. Instead of 60 cells in a typical classic PV module, there are twice as many cells in modules with half cells. A simulation model was built in the Matlab/Simulink engineering calculations package, using the “Solar Cell” component, which is a double-diode PV cell replacement model. The simulation model reflects the internal structure of the PV module from half cells so that the output current is divided into two equal parts inside, and the structure of the module is divided into six sections. Simulation tests were performed for the same parameters that were measured during actual measurements of the current–voltage characteristics of the partially shaded PV module. Verification tests were carried out for the photovoltaic module—JAM60S03-320/PR—using the I–V 400 meter. Four different cases of partial shading of the module were verified and one for the case of no shading, but in conditions different from the standard, given by the manufacturer.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Simulation Resultsmentioning

confidence: 99%

Section: Construction Of Simulation Model In Matlab Packagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling the Functioning of the Half-Cells Photovoltaic Module under Partial Shading in the Matlab Package

Sarniak

2020

Applied Sciences

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Influence of Selected Weather Conditions on the Photovoltaic System Efficiency in Central Poland – Case Study

Sarniak

2024

Adv. Sci. Technol. Res. J.

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The article details the data obtained from monitoring the photovoltaic (PV) system in 2021-2023, equipped with a module for measuring basic weather parameters. The PV system under consideration, with a peak output of 3.2 kW p , is connected to the electricity grid and is mounted on the flat roof of the building. The annual relative yields of the generated energy were about 10% less than estimated, and their monthly distributions were asymmetric. In the "summer" months (i.e., from April to September), the PV system generated, on average, about 75% of the whole year's energy. The histograms of the PV system's active power output showed that, on average, about 40% of the time, the PV inverter operated in underloaded mode. For selected weather conditions measured on site, a regression analysis was conducted with the active output power of the PV system. The main objective of the work was to develop a comprehensive method for analysing PV plant monitoring data and the impact of weather conditions on its performance. The proposed method was realized as a case study for central Poland but can be implemented anywhere.

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Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe

Sarniak

2020

Sustainability

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The paper analyzes a case study of the impact of changing the nominal power ratio (NPR) on the efficiency of a PV (photovoltaic) system located in Poland. In the first stage of the research, the acceptable range of variability for NPR was determined based on simulation calculations, taking into account the parameters of PV modules, inverter, and climatic conditions. The second stage was verification tests for two acceptable extreme cases, carried out based on the analysis of detailed data from the monitoring of PV installations. The results of the verification tests for the two considered periods of operation of the PV system with the change of the NPR coefficient from 82% to 98% resulted in an increase in the annual energy yield by 446.2 kWh. On the other hand, higher relative values of generated energy were obtained only for the months with the lowest insolation in December and in January by 8.2 and 6.04 kWh/kWp, respectively. Higher oversizing of the PV generator (for NPR = 82%) also resulted in an increase by 6.4% in the frequency of operation of the PV inverter in the largest power range (2250–2500 W) and a decrease by 3.7% in the frequency in the lowest power range (0–250 W) for the whole year.

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Influence of Solar Radiation and Ambient Temperature on the Unit Yield of a Photovoltaic System

Cited by 3 publications

References 0 publications

Modeling the Functioning of the Half-Cells Photovoltaic Module under Partial Shading in the Matlab Package

Modeling the Functioning of the Half-Cells Photovoltaic Module under Partial Shading in the Matlab Package

Influence of Selected Weather Conditions on the Photovoltaic System Efficiency in Central Poland – Case Study

Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe

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