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Distribution voltage regulation through optimal OLTC control in Brussels urban area

Verhaegen, Fred
(2024)

Files

Verhaegen_72481600_2024.pdf
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  • 4.84 MB
Verhaegen_72481600_2024_Appendix1.zip
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Details

Supervisors
De Jaeger, Emmanuel
Faculty
Ecole polytechnique de Louvain
Degree label
Master [120] : ingénieur civil électromécanicien, à finalité spécialisée: énergie
Abstract
The rapid growth of distributed renewable energy sources, especially photovoltaic (PV) systems, has introduced significant challenges in maintaining voltage levels within statutory limits in electrical distribution networks. In particular, the traditional control strategy of on-load tap changers (OLTCs) has not been designed to handle the effects of bidirectional power flows within the grid. To solve this issue, this work investigates an adapted optimal control scheme, applied to an urban distribution feeder in Brussels. The scheme aims to efficiently minimize voltage deviations within the feeder while limiting the amount of tap operations (TO) required by the OLTCs. The control strategy is tested using historical load and generation data from 2022 and compared against other control strategies. The results show that the optimal scheme consistently and significantly reduces voltage deviations in the feeder and allows increased PV penetrations under multiple scenarios, sometimes with fewer TO. In addition, if the feeder has a single OLTC, a comparison also shows that a simpler control method can provide similar voltage regulation capabilities, but needs to be adapted to reduce the number of TO.