A methodology for prediction and assessment of shading on PV systems

Chepp, Ellen David; Krenzinger, Arno

doi:10.1016/j.solener.2021.01.002

Cited by 24 publications

(6 citation statements)

References 48 publications

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“…The software also calculates the maximum power point (MPP) from an input file with irradiance and temperature data. The PV modeling based on the single diode model and the operation of Crearray were described by Chepp and Krenzinger (2021). This software allows a detailed analysis of the I-V curve for any condition, making possible a better adjustment of input variables that are shared with the simulations performed in PVSyst and SAM later on.…”

Section: Methodsmentioning

confidence: 99%

“…Electrical and climatic data as well measured I-V curves were employed to adjust the input parameters for the simulations and check the simulation accuracy. The software called Crearray (Chepp and Krenzinger, 2021) was used to perform the simulations with greater control of variables and for comparison with the results of the analyzed tools. Simulations with SAM and PVSyst were performed using a weather file with measured data and adjusted input parameters, allowing the comparison between the simulated and measured results.…”

Section: Introductionmentioning

confidence: 99%

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Accuracy investigation in the modeling of partially shaded photovoltaic systems

2021

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Software for simulation of photovoltaic (PV) systems is widely used for dimensioning and forecasting electrical production. A factor of losses in PV installations is the partial shading caused by surrounding elements, and these software allow the user to estimate this effect. However, the accuracy of these simulated results for shaded PV systems is not widely studied. The purpose of this article is to investigate the accuracy and quantify the differences between simulated and measured data of partially shaded PV systems, obtained with the widely used tools SAM and PVSyst. Measured data from a PV installation were compared to results from simulations performed using the different shading calculation options available in both tools. The simulated outputs were both underestimated and overestimated in the shading situations. This variation was related to the use of an hourly fraction of shading and, in the case of SAM, due to the limitations of the 3D tools available for representation. Another source of differences between simulated and measured values was the use of uniform shading factors for diffuse and albedo. In addition, the simplification of the 3D model had a significant impact on the predicted energy, mainly on cloudy days. Both software overestimated the electricity production for the entire measurement period, reaching differences between the predicted and the measured energy varying from 9% to 24%. Shaded PV systems must be carefully analyzed, and the simulated results may differ from the measured values, which may even influence the decision on the feasibility of an installation.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accuracy investigation in the modeling of partially shaded photovoltaic systems

2021

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“…Shading on the PV module is one factor that will reduce the PV module's power output and cause heating in a solar cell [18]. Therefore, the shading scenario of the prospective site needs to evaluate.…”

Section: Shading Analysismentioning

confidence: 99%

Design of ground-mounted grid-connected photovoltaic system with bifacial modules using PVsyst software

Mohamed

Sulaiman

Rahim

2022

J. Phys.: Conf. Ser.

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Bifacial photovoltaic module has gained significant traction in recent years due to its higher irradiation capture capabilities with cost-effective technology. This paper presents the design, simulation, and techno-economic evaluation of a 45MW fixed-tilt ground-mounted grid-connected photovoltaic system with bifacial photovoltaic modules. The site is located in Sungai Petani, Kedah, Malaysia. The PVsyst 7.2 software was used to design the system by selecting the rating of PV module, inverter and tilt angle of PV modules. In addition, shading and loss calculation, as well as performance evaluation, were also conducted using the software. The simulation of the optimal geometrical parameters had shown an optimal tilt angle of 5°, the pitch of 5.5m and PV array installation height of 1.5m with an albedo value of 0.25. Besides, the performance of system with bifacial and monofacial modules were compared in terms of techno-economic performance indicators. The results showed that the bifacial PV system produces higher energy output with a lower levelized cost of electricity when compared to the system with monofacial PV modules.

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“…Partially shaded circumstances can be caused by shadows [4]. The impacts of real-world situations on the performance and efficiency of solar panels were investigated in [5]. In another study, a long-term reliability assessment approach was employed to study the implications of climate change on the structural level of PV systems [6].…”

Section: Introductionmentioning

confidence: 99%

A Novel TSA-PSO Based Hybrid Algorithm for GMPP Tracking under Partial Shading Conditions

et al. 2022

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In this paper, a new hybrid TSA-PSO algorithm is proposed that combines tunicate swarm algorithm (TSA) with the particle swarm optimization (PSO) technique for efficient maximum power extraction from a photovoltaic (PV) system subjected to partial shading conditions (PSCs). The performance of the proposed algorithm was enhanced by incorporating the PSO algorithm, which improves the exploitation capability of TSA. The response of the proposed TSA-PSO-based MPPT was investigated by performing a detailed comparative study with other recently published MPPT algorithms, such as tunicate swarm algorithm (TSA), particle swarm optimization (PSO), grey wolf optimization (GWO), flower pollination algorithm (FPA), and perturb and observe (P&O). A quantitative and qualitative analysis was carried out based on three distinct partial shading conditions. It was observed that the proposed TSA-PSO technique had remarkable success in locating the maximum power point and had quick convergence at the global maximum power point. The presented TSA-PSO MPPT algorithm achieved a PV tracking efficiency of 97.64%. Furthermore, two nonparametric tests, Friedman ranking and Wilcoxon rank-sum, were also employed to validate the effectiveness of the proposed TSA-PSO MPPT method.

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A methodology for prediction and assessment of shading on PV systems

Cited by 24 publications

References 48 publications

Accuracy investigation in the modeling of partially shaded photovoltaic systems

Accuracy investigation in the modeling of partially shaded photovoltaic systems

Design of ground-mounted grid-connected photovoltaic system with bifacial modules using PVsyst software

A Novel TSA-PSO Based Hybrid Algorithm for GMPP Tracking under Partial Shading Conditions

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