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Effect of Individual Volt/var Control Strategies in LINK -Based Smart Grids with a High Photovoltaic Share

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  • Daniel-Leon Schultis

    (Institute of Energy Systems and Electrical Drives, TU Wien, 1040 Vienna, Austria)

  • Albana Ilo

    (Institute of Energy Systems and Electrical Drives, TU Wien, 1040 Vienna, Austria)

Abstract

The increasing share of distributed energy resources aggravates voltage limit compliance within the electric power system. Nowadays, various inverter-based Volt/var control strategies, such as cos φ ( P ) and Q ( U ), for low voltage feeder connected L ( U ) local control and on-load tap changers in distribution substations are investigated to mitigate the voltage limit violations caused by the extensive integration of rooftop photovoltaics. This study extends the L ( U ) control strategy to X ( U ) to also cover the case of a significant load increase, e.g., related to e-mobility. Control ensembles, including the reactive power autarky of customer plants, are also considered. All Volt/var control strategies are compared by conducting load flow calculations in a test distribution grid. For the first time, they are embedded into the LINK -based Volt/var chain scheme to provide a holistic view of their behavior and to facilitate systematic analysis. Their effect is assessed by calculating the voltage limit distortion and reactive power flows at different Link-Grid boundaries, the corresponding active power losses, and the distribution transformer loadings. The results show that the control ensemble X ( U ) local control combined with reactive power self-sufficient customer plants performs better than the cos φ ( P ) and Q ( U ) local control strategies and the on-load tap changers in distribution substations.

Suggested Citation

  • Daniel-Leon Schultis & Albana Ilo, 2021. "Effect of Individual Volt/var Control Strategies in LINK -Based Smart Grids with a High Photovoltaic Share," Energies, MDPI, vol. 14(18), pages 1-31, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:18:p:5641-:d:631306
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    References listed on IDEAS

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    1. Daniel-Leon Schultis, 2019. "Comparison of Local Volt/var Control Strategies for PV Hosting Capacity Enhancement of Low Voltage Feeders," Energies, MDPI, vol. 12(8), pages 1-27, April.
    2. Daniel-Leon Schultis & Albana Ilo, 2019. "Behaviour of Distribution Grids with the Highest PV Share Using the Volt/Var Control Chain Strategy," Energies, MDPI, vol. 12(20), pages 1-23, October.
    3. O׳Connell, Niamh & Pinson, Pierre & Madsen, Henrik & O׳Malley, Mark, 2014. "Benefits and challenges of electrical demand response: A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 39(C), pages 686-699.
    4. Daniel-Leon Schultis & Albana Ilo, 2021. "Increasing the Utilization of Existing Infrastructures by Using the Newly Introduced Boundary Voltage Limits," Energies, MDPI, vol. 14(16), pages 1-27, August.
    5. Chathurangi, D. & Jayatunga, U. & Perera, S. & Agalgaonkar, A.P. & Siyambalapitiya, T., 2021. "Comparative evaluation of solar PV hosting capacity enhancement using Volt-VAr and Volt-Watt control strategies," Renewable Energy, Elsevier, vol. 177(C), pages 1063-1075.
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    Cited by:

    1. Daniel-Leon Schultis, 2022. "Effective Volt/var Control for Low Voltage Grids with Bulk Loads," Energies, MDPI, vol. 15(5), pages 1-30, March.

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