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Article

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

Institute of Energy Systems and Electrical Drives, TU Wien, 1040 Vienna, Austria
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Author to whom correspondence should be addressed.
Academic Editor: Luis Hernández-Callejo
Energies 2021, 14(18), 5641; https://doi.org/10.3390/en14185641
Received: 18 August 2021 / Revised: 30 August 2021 / Accepted: 6 September 2021 / Published: 8 September 2021
(This article belongs to the Special Issue Future of Smart Grid and Renewable Energy)
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 cosφ(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 cosφ(P) and Q(U) local control strategies and the on-load tap changers in distribution substations. View Full-Text
Keywords: Volt/var control; distribution grid; photovoltaic; smart grid; LINK; boundary voltage limits; local control; X(U); CP_Q-Autarky Volt/var control; distribution grid; photovoltaic; smart grid; LINK; boundary voltage limits; local control; X(U); CP_Q-Autarky
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MDPI and ACS Style

Schultis, D.-L.; Ilo, A. Effect of Individual Volt/var Control Strategies in LINK-Based Smart Grids with a High Photovoltaic Share. Energies 2021, 14, 5641. https://doi.org/10.3390/en14185641

AMA Style

Schultis D-L, Ilo A. Effect of Individual Volt/var Control Strategies in LINK-Based Smart Grids with a High Photovoltaic Share. Energies. 2021; 14(18):5641. https://doi.org/10.3390/en14185641

Chicago/Turabian Style

Schultis, Daniel-Leon, and Albana Ilo. 2021. "Effect of Individual Volt/var Control Strategies in LINK-Based Smart Grids with a High Photovoltaic Share" Energies 14, no. 18: 5641. https://doi.org/10.3390/en14185641

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