Short-term forecast of generation of electric energy in photovoltaic systems

Bugała, Artur; Zaborowicz, Maciej; Boniecki, P.; Janczak, Damian; Koszela, Krzysztof; Czekała, Wojciech; Lewicki, Andrzej

doi:10.1016/j.rser.2017.07.032

Cited by 55 publications

(21 citation statements)

References 21 publications

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“…In educational processes in technical schools and industrial training centers, besides theoretical knowledge transfer, an extremely important element is the use of properly selected teaching aids in the form of multimedia presentations with animations, preview videos, computer simulations or physical demonstration stands related to the functioning of the presented elements and systems [1,2]. A very important factor in teaching is to familiarize educated people with the latest scientific research: with the applied computational methods [3][4][5][6][7][8][9][10][11][12][13], processes of their development, tests and measurements results and their interpretation [14][15][16][17][18][19] or simulations of systems functioning [20][21][22][23][24]. However, the most effective means of describing the technical issues are properly organized demonstration and research stands.…”

Section: The Role Of Presentation Means In Theoretical Knowledge and mentioning

confidence: 99%

Didactic means in knowledge and practical skills shaping in the technical education processes

et al. 2019

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The article deals with the didactic and technical aspects of the information media selection and organization in educational processes in the field of operation and testing the electrical components and systems. The aim was to develop a presentation means that enable the acquisition of practical skills and understanding of the theoretical aspects of the issues under consideration. The practical part presents propositions of original stands for testing and presenting the functioning of rotational speed sensors as well as linear and angular position sensors, used in electrical and IT systems in industry and vehicles. The design, physical implementation and the possibilities of applications were described.

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Section: The Role Of Presentation Means In Theoretical Knowledge and mentioning

confidence: 99%

Didactic means in knowledge and practical skills shaping in the technical education processes

et al. 2019

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“…To design a SAPV system it is necessary to determine the PV panels' rated power and battery storage capacity. PV generation has uncertainty associated to its energy output which depends on the irradiation level [8,9]. This irradiation level depends on the weather condition, varying widely between sunny and cloudy days, in the short term (hour to hour) and in the long term (seasonal variations) [10,11].…”

Section: Introductionmentioning

confidence: 99%

Accurate Sizing of Residential Stand-Alone Photovoltaic Systems Considering System Reliability

et al. 2020

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In rural areas or in isolated communities in developing countries it is increasingly common to install micro-renewable sources, such as photovoltaic (PV) systems, by residential consumers without access to the utility distribution network. The reliability of the supply provided by these stand-alone generators is a key issue when designing the PV system. The proper system sizing for a minimum level of reliability avoids unacceptable continuity of supply (undersized system) and unnecessary costs (oversized system). This paper presents a method for the accurate sizing of stand-alone photovoltaic (SAPV) residential generation systems for a pre-established reliability level. The proposed method is based on the application of a sequential random Monte Carlo simulation to the system model. Uncertainties of solar radiation, energy demand, and component failures are simultaneously considered. The results of the case study facilitate the sizing of the main energy elements (solar panels and battery) depending on the required level of reliability, taking into account the uncertainties that affect this type of facility. The analysis carried out demonstrates that deterministic designs of SAPV systems based on average demand and radiation values or the average number of consecutive cloudy days can lead to inadequate levels of continuity of supply.

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“…Currently a lot of attention is paid to all the solutions connected with using energy from ecological sources, such as photovoltaic systems, wind turbines, biomass, tidal energy, etc. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…People try to achieve their goals in a way most beneficial for them. This is associated with a great variety of optimization criteria, methods of creating criterial functions and the used methods, which depend on a given task [4,5,22,[28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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Statistical analysis of the electric energy production from photovoltaic conversion using mobile and fixed constructions

et al. 2017

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Abstract. The paper presents the most representative -from the three-year measurement time periodcharacteristics of daily and monthly electricity production from a photovoltaic conversion using modules installed in a fixed and 2-axis tracking construction. Results are presented for selected summer, autumn, spring and winter days. Analyzed measuring stand is located on the roof of the Faculty of Electrical Engineering Poznan University of Technology building. The basic parameters of the statistical analysis like mean value, standard deviation, skewness, kurtosis, median, range, or coefficient of variation were used. It was found that the asymmetry factor can be useful in the analysis of the daily electricity production from a photovoltaic conversion. In order to determine the repeatability of monthly electricity production, occurring between the summer, and summer and winter months, a non-parametric Mann-Whitney U test was used as a statistical solution. In order to analyze the repeatability of daily peak hours, describing the largest value of the hourly electricity production, a non-parametric Kruskal-Wallis test was applied as an extension of the Mann-Whitney U test. Based on the analysis of the electric energy distribution from a prepared monitoring system it was found that traditional forecasting methods of the electricity production from a photovoltaic conversion, like multiple regression models, should not be the preferred methods of the analysis.

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Short-term forecast of generation of electric energy in photovoltaic systems

Cited by 55 publications

References 21 publications

Didactic means in knowledge and practical skills shaping in the technical education processes

Didactic means in knowledge and practical skills shaping in the technical education processes

Accurate Sizing of Residential Stand-Alone Photovoltaic Systems Considering System Reliability

Statistical analysis of the electric energy production from photovoltaic conversion using mobile and fixed constructions

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