Influence of the Size of the PV Power Plant on Operating Parameters and Its Efficiency

Jarosław Knaga , Krzysztof Nęcka , Tomasz Szul , Bogusława Łapczyńska-Kordon , Robert Bernacik


Currently built PV power plants are included in the national energy system, giving the opportunity to “store” energy in this system, provided that they are power plants with pico power or below 40 kWp. The concept of storage refers to the fact that excess energy is put into the energy system, and in the later period we can take from the grid less than 80% of what was given depending on the age of installed power of the PV plant. The operation of the power plant is settled on a semi-annual basis. The purpose of the work was to develop a simple methodology to determine the efficiency of energy use generated from a photovoltaic micro electric plant for the needs of users of prosumer installations. The research was carried out in a vegetable farm located in the Kazimierza Wielka poviat on three independent photovoltaic installations, which were used to cover the energy needs of the household and vegetable store, respectively. Regardless of the oversizing of the PV installation on the DC voltage side, the operating point is very rigidly maintained, and its changes are in the range of 747 ÷ 760 V DC of direct voltage, which is unfavorable. Oversizing the PV installation on the DC side results in a proportional increase in unit costs without the effect of an increase in the unit efficiency of the electricity produced.
Author Jarosław Knaga (FoPaPE / DoEaAPA)
Jarosław Knaga,,
- Department of Energy and Agricultural Process Automation
, Krzysztof Nęcka (FoPaPE / DoEaAPA)
Krzysztof Nęcka,,
- Department of Energy and Agricultural Process Automation
, Tomasz Szul (FoPaPE / DoEaAPA)
Tomasz Szul,,
- Department of Energy and Agricultural Process Automation
, Bogusława Łapczyńska-Kordon (FoPaPE / DoMEaA)
Bogusława Łapczyńska-Kordon,,
- Department of Mechanical Engineering and Agrophysics
, Robert Bernacik (FoPaPE / DoEaAPA)
Robert Bernacik,,
- Department of Energy and Agricultural Process Automation
Pages 483-492
Publication size in sheets0.5
Book Wróbel Marek, Jewiarz Marcin, Szlęk Andrzej (eds.): Renewable Energy Sources: Engineering, Technology, Innovation : ICORES 2018, Springer Proceedings in Energy, 2020, Springer, ISBN 978-3-030-13887-5, [978-3-030-13888-2], 1094 p., DOI:10.1007/978-3-030-13888-2
Keywords in EnglishPV modules, Photovoltaic power plant, Operation of a power plant, Energy, Efficiency
Languageen angielski
Score (nominal)20
Score sourcepublisherList
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