A Fuzzy OLTC Controller: Applicability in the Transition Stage of the Energy System Transformation

Wiktor Wróblewski (), Ryszard Kowalik, Marcin Januszewski and Karol Kurek
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Wiktor Wróblewski: Electrical Power Engineering Institute, Faculty of Electrical Engineering, Warsaw University of Technology, 00-662 Warsaw, Poland
Ryszard Kowalik: Electrical Power Engineering Institute, Faculty of Electrical Engineering, Warsaw University of Technology, 00-662 Warsaw, Poland
Marcin Januszewski: Electrical Power Engineering Institute, Faculty of Electrical Engineering, Warsaw University of Technology, 00-662 Warsaw, Poland
Karol Kurek: Electrical Power Engineering Institute, Faculty of Electrical Engineering, Warsaw University of Technology, 00-662 Warsaw, Poland

Energies, 2024, vol. 17, issue 11, 1-16

Abstract: This paper introduces a Fuzzy Logic Controller designed for an on-load tap changer within medium voltage distribution systems with bulk penetration of Distributed Energy Resources. As the on-load tap changer remains one of the most essential forms of voltage regulation in medium voltage distribution networks, improving its operation is a cost-effective response to the emerging voltage violations caused by intermittent generation during the early stages of the energy system transformation. Software-in-the-loop simulations were conducted to validate the effectiveness of the proposed algorithm compared to the conventional methods. A modified CIGRE Medium Voltage Distribution Network Benchmark in European Configuration was modelled while the controller code developed in Python 3.12 was running on a PC, both coupled in a real-time closed-loop environment. The analyses showed that the proposed algorithm managed to reduce overvoltage from 7.02% to 4.85% in the benchmark network, thus demonstrating that the algorithm is efficient and ready for on-field implementation.

Keywords: distribution networks; distributed energy resources; fuzzy logic; on-load tap changer; real-time simulation; voltage regulation (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: 2024
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