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Article

Analysis of Traditional and Alternative Methods for Solving Voltage Problems in Low Voltage Grids: An Estonian Case Study

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FinEst Centre for Smart Cities, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia
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Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia
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Author to whom correspondence should be addressed.
Academic Editors: Gian Giuseppe Soma and Alon Kuperman
Energies 2022, 15(3), 1104; https://doi.org/10.3390/en15031104
Received: 17 November 2021 / Revised: 23 January 2022 / Accepted: 30 January 2022 / Published: 2 February 2022
(This article belongs to the Topic Power Distribution Systems)
Smart Cities can benefit from existing municipal low voltage (LV) distribution grids by supporting public services with permanent power supply and providing grid connection points to distributed generators (DG). The increased integration of DGs and inverter based non-linear loads increases voltage quality issues, thus the cost-efficient assurance of voltage quality in LV grids with long radial lines is of increasing importance for the operators of municipal electricity distribution systems. Conventional methods for mitigating voltage quality issues (e.g., power line renovation) might not be optimal solutions either technologically or economically. Existing studies do not address all relevant issues related to the assurance of required voltage quality in such LV grids. This paper provides an overview of the applicability and rationality of traditional as well as alternative methods to solve voltage problems in LV grids. The authors use DIgSILENT PowerFactory software to simulate the performance of voltage stabilisers under different conditions. The authors propose a robust method for the classification of LV feeders and provide recommendations on how to resolve voltage quality problems, with the help of different power quality improvement devices, where the traditional methods of upgrading to medium voltage and grid reinforcement are economically infeasible. Based on our results, recommendations for mitigating voltage quality problems in LV distribution grids with radial lines of different lengths are given. View Full-Text
Keywords: voltage quality; low voltage distribution grid; power system modelling; voltage measurement; voltage quality improvement voltage quality; low voltage distribution grid; power system modelling; voltage measurement; voltage quality improvement
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MDPI and ACS Style

Rosin, A.; Drovtar, I.; Mõlder, H.; Haabel, K.; Astapov, V.; Vinnal, T.; Korõtko, T. Analysis of Traditional and Alternative Methods for Solving Voltage Problems in Low Voltage Grids: An Estonian Case Study. Energies 2022, 15, 1104. https://doi.org/10.3390/en15031104

AMA Style

Rosin A, Drovtar I, Mõlder H, Haabel K, Astapov V, Vinnal T, Korõtko T. Analysis of Traditional and Alternative Methods for Solving Voltage Problems in Low Voltage Grids: An Estonian Case Study. Energies. 2022; 15(3):1104. https://doi.org/10.3390/en15031104

Chicago/Turabian Style

Rosin, Argo, Imre Drovtar, Heigo Mõlder, Kaija Haabel, Victor Astapov, Toomas Vinnal, and Tarmo Korõtko. 2022. "Analysis of Traditional and Alternative Methods for Solving Voltage Problems in Low Voltage Grids: An Estonian Case Study" Energies 15, no. 3: 1104. https://doi.org/10.3390/en15031104

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