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

Daniel-Leon Schultis and Albana Ilo
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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

Energies, 2021, vol. 14, issue 18, 1-31

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.

Keywords: Volt/var control; distribution grid; photovoltaic; smart grid; LINK; boundary voltage limits; local control; X ( U ); CP_ Q -Autarky (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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