EU PVSEC Programme Online
EU PVSEC 2021, 6 - 10 September 2021
Presentation: 5CV.2.40 Analysis of Temperature Inertia of PV Modules Using Different Temperature Estimation Models
Type: Visual
Date: Wednesday, 8th September 2021
13:30 - 15:00
Author(s): A.K. Vidal de Oliveira, M. Braga, S.-Y. Oh, S. Dittmann, R. Gottschalg, C.D. Rodríguez-Gallegos, T. Reindl, K. Ettalbi, T.R. Betts, L. Burnham, R. Rüther
Presenter / Speaker: A.K. Vidal de Oliveira, UFSC, Florianópolis, Brazil
Event: Conference Conference
Session: 5CV.2 Operation, Performance and Maintenance of PV Systems
Topic: 5. 3 Operation, Performance and Maintenance of PV Systems
Keywords: Modelling / Modeling, Thermal Performance, System Performance
Summary / Abstract: Module temperature is one of the main factors that directly influence photovoltaic energy production, and therefore, its precise modelling is of foremost relevance. However, most of the temperature models in the literature fail to acknowledge the transient effect due to the heat capacity of the PV module, as they instead model the temperature based on the steady-state condition. This paper addresses these modeling weaknesses by comparing two wellestablished steady-state methods (the so-called Ross and Faiman models) with the Oh et al. model, which includes the transient effect of the heat capacity of PV modules in its calculations. Results show that the Oh et al. model provides more accurate results for high-resolution data when compared to steady-state models. The results are even more precise when using it to calculate the module temperature using the measurement from the previous time step, which indicates that the model could be used to forecast module temperature for a time step in the future. Across all models, climate is a major factor affecting model accuracy, what demonstrates the importance of the analysis of the impact of different site conditions on PV modeling and on the selection of models that are best matched to specific climates.