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

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  • Argo Rosin

    (FinEst Centre for Smart Cities, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia
    Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia)

  • Imre Drovtar

    (FinEst Centre for Smart Cities, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia
    Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia)

  • Heigo Mõlder

    (FinEst Centre for Smart Cities, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia
    Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia)

  • Kaija Haabel

    (Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia)

  • Victor Astapov

    (Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia)

  • Toomas Vinnal

    (Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia)

  • Tarmo Korõtko

    (FinEst Centre for Smart Cities, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia
    Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, Ehitajate Road 5, 19086 Tallinn, Estonia)

Abstract

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.

Suggested Citation

  • Argo Rosin & Imre Drovtar & Heigo Mõlder & Kaija Haabel & Victor Astapov & Toomas Vinnal & Tarmo Korõtko, 2022. "Analysis of Traditional and Alternative Methods for Solving Voltage Problems in Low Voltage Grids: An Estonian Case Study," Energies, MDPI, vol. 15(3), pages 1-22, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:1104-:d:740735
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    References listed on IDEAS

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    1. Nasim Jabalameli & Xianging Su & Sara Deilami, 2019. "An Online Coordinated Charging/Discharging Strategy of Plug-in Electric Vehicles in Unbalanced Active Distribution Networks with Ancillary Reactive Service in the Energy Market," Energies, MDPI, vol. 12(7), pages 1-17, April.
    2. Fabio Cazzato & Marco Di Clerico & Maria Carmen Falvo & Simone Ferrero & Marco Vivian, 2020. "New Dispatching Paradigm in Power Systems Including EV Charging Stations and Dispersed Generation: A Real Test Case," Energies, MDPI, vol. 13(4), pages 1-13, February.
    3. Jun Yin Lee & Renuga Verayiah & Kam Hoe Ong & Agileswari K. Ramasamy & Marayati Binti Marsadek, 2020. "Distributed Generation: A Review on Current Energy Status, Grid-Interconnected PQ Issues, and Implementation Constraints of DG in Malaysia," Energies, MDPI, vol. 13(24), pages 1-40, December.
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    Cited by:

    1. Younes Zahraoui & Tarmo Korõtko & Argo Rosin & Hannes Agabus, 2023. "Market Mechanisms and Trading in Microgrid Local Electricity Markets: A Comprehensive Review," Energies, MDPI, vol. 16(5), pages 1-52, February.

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