Analysis of the Influence of Load on the Value of Zero-Voltage Asymmetry in Medium-Voltage Networks Operating with Renewable Energy Sources

Grzegorz Hołdyński, Zbigniew Skibko () and Andrzej Borusiewicz
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Grzegorz Hołdyński: Faculty of Electrical Engineering, Bialystok University of Technology, 15-351 Bialystok, Poland
Zbigniew Skibko: Faculty of Electrical Engineering, Bialystok University of Technology, 15-351 Bialystok, Poland
Andrzej Borusiewicz: International University of Applied Sciences in Lomza, 18-402 Lomza, Poland

Energies, 2023, vol. 16, issue 2, 1-13

Abstract: The phenomenon of voltage asymmetry is common in electricity networks and is the cause of many unfavourable phenomena occurring, such as an increase in power and energy losses, as well as the abnormal operation of certain loads. Voltage asymmetry can be caused by several different factors, which include the design of the transmission line (e.g., routing of conductors in relation to each other and the earth), the parameters of consumer circuits (e.g., unequal loading of individual phases), or the design of network equipment (e.g., generators or transformers). An asymmetrical condition also occurs during system disturbances such as single-phase short circuits or lightning. One of the many factors impinging on voltage asymmetry in the electrical network is also the effect of load, but in the case of medium voltage power networks, this effect is neglected in the literature. This paper presents and evaluates the influence of the power consumed by consumers on the values of zero-voltage asymmetry factor indices in medium voltage compensated power networks with the neutral point earthed by an inductance (Petersen coil) operating with wind and photovoltaic power plants.

Keywords: wind energy; power quality; voltage asymmetry; voltage distortion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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