Increasing the Utilization of Existing Infrastructures by Using the Newly Introduced Boundary Voltage Limits

Daniel-Leon Schultis and Albana Ilo
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Daniel-Leon Schultis: TU Wien—Institute of Energy Systems and Electrical Drives, 1040 Vienna, Austria
Albana Ilo: TU Wien—Institute of Energy Systems and Electrical Drives, 1040 Vienna, Austria

Energies, 2021, vol. 14, issue 16, 1-27

Abstract: The increasing share of distributed generation aggravates voltage limit compliance at customers’ delivery points. Currently, grid operators validate compliance with the voltage limits specified in Grid Codes by conducting load flow simulations at the medium voltage level, considering the connected low voltage grids as ‘loads’ to reduce the modeling effort. This approach does not support the accurate validation of limit compliance, as the voltage drops at the low voltage level are unknown. Nevertheless, to guarantee acceptable voltages even under worst-case conditions, safety margins are involved that impair the utilization of the electricity infrastructure. This study conducts load flows simulations in a test distribution grid, revealing the variable character of the voltage limits at different system boundaries. The conventional load model is extended by new parameters—the boundary voltage limits—to enable the consideration of variable voltage limits in load flow analysis of LINK -based smart grids. The standardized structure of the LINK -architecture allows for the systematic and accurate validation of voltage limit compliance by reducing the required modeling data to the technically necessary minimum. Use cases are specified that allows smart grids to increase the utilization of the electricity infrastructure by day-ahead scheduling and short-term adaptation of boundary voltage limits.

Keywords: boundary voltage limits; LINK; lumped model; radial grid; smart grid; load flow; grid model (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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