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Effect of Reactive Power Generation in Photovoltaic Installations on the Voltage Value at the Inverter Connection Point

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  • Grzegorz Hołdyński

    (Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D, 15-351 Bialystok, Poland)

  • Zbigniew Skibko

    (Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D, 15-351 Bialystok, Poland)

  • Andrzej Borusiewicz

    (Department of Agronomy, Modern Technology and Informatics, International Academy of Applied Sciences in Lomza, 18-402 Lomza, Poland)

  • Andrzej Marczuk

    (Department of Agricultural, Forestry and Transport Machines, University of Life Sciences in Lublin, Głęboka 28, 20-612 Lublin, Poland)

  • Adam Koniuszy

    (Department of Renewable Energy Engineering, West Pomeranian University of Technology in Szczecin, Pawla VI 1, 71-459 Szczecin, Poland)

Abstract

Worldwide, photovoltaic installations are making an increasing contribution to electric energy generation. These are power-unstable sources due to the rapid and frequent change in insolation. As a result, a common problem noted in low-voltage power grids is that the permitted voltage values at the source connection point are exceeded. There are several methods of limiting the voltage values present at the inverter. One of them is the generation of reactive power in a photovoltaic installation. In the literature, one can find many relationships that allow one to determine the increase in voltage caused by the change in reactive power, where the imaginary part of the voltage loss is omitted as insignificant. The authors’ research has shown that this can lead to significant errors. Omitting the imaginary value causes the determined values to be even more than 4.5 times smaller—these differences increase with the length of the line. The analyses carried out by the authors show that the determination of voltage increments with and without taking into account the imaginary part of the voltage loss in the calculations differs from the values determined via computer simulation (failure to take into account the imaginary part results in calculated values of voltage increase being lower than the values determined via a computer by about 40% on average).

Suggested Citation

  • Grzegorz Hołdyński & Zbigniew Skibko & Andrzej Borusiewicz & Andrzej Marczuk & Adam Koniuszy, 2024. "Effect of Reactive Power Generation in Photovoltaic Installations on the Voltage Value at the Inverter Connection Point," Energies, MDPI, vol. 17(19), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:19:p:4863-:d:1487643
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    References listed on IDEAS

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    1. Rehman, Waqas ur & Bo, Rui & Mehdipourpicha, Hossein & Kimball, Jonathan W., 2022. "Sizing battery energy storage and PV system in an extreme fast charging station considering uncertainties and battery degradation," Applied Energy, Elsevier, vol. 313(C).
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