Automatic voltage regulation application for PV inverters in low-voltage distribution grids – A digital twin approach

Gui, Yonghao; Nainar, Karthikeyan; Ciontea, Catalin Iosif; Bendtsen, Jan Dimon; Iov, Florin; Shahid, Kamal; Stoustrup, Jakob

doi:10.1016/j.ijepes.2023.109022

Automatic voltage regulation application for PV inverters in low-voltage distribution grids – A digital twin approach

Journal Article · Wed Feb 15 23:00:00 EST 2023 · International Journal of Electrical Power and Energy Systems

DOI:https://doi.org/10.1016/j.ijepes.2023.109022· OSTI ID:1928920

^[1]; ^[2]; Ciontea, Catalin Iosif ^[3]; ^[4]; ^[4]; ^[5]; ^[4]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Aalborg Univ. (Denmark)
Siemens Gamesa Renewable Energy, Brande (Denmark); Aalborg Univ. (Denmark)
Haldor Topsoe A/S, Lyngby (Denmark); Aalborg Univ. (Denmark)
Aalborg Univ. (Denmark)
Aalborg Univ. (Denmark); University of the Punjab, Lahore (Pakistan)

This paper proposes a hierarchical coordinated control strategy for PV inverters to keep voltages in low-voltage (LV) distribution grids within specified limits. The top layer of the proposed architecture consists of the designed automatic voltage regulation (AVR) application, which has access to voltage measurements and grid parameters from the LV distribution grid, both current and historical. The AVR application solves a constrained optimization problem, which provides a set of local control set-points that bring the voltage across the grid within bounds. The middle layer consists of a local Volt/VAR controller, which is adjusted by the AVR app, while the bottom layer is the inner-loop controller of the PV inverter. The proposed method not only improves the voltage quality in the grid but also manages the reactive power outputs of PV inverters efficiently. Further, a digital twin of the cyber-physical system has also been employed that interacts with the control system to ensure its appropriate operation. The effectiveness of the proposed methodology is demonstrated on a representative low-voltage feeder located in Denmark.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Electricity Delivery and Energy Reliability (OE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; European Union (EU)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1928920

Alternate ID(s):: OSTI ID: 1999866

Journal Information:: International Journal of Electrical Power and Energy Systems, Journal Name: International Journal of Electrical Power and Energy Systems Vol. 149; ISSN 0142-0615

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Automatic voltage regulation application for PV inverters in low-voltage distribution grids – A digital twin approach

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