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Adaptive inertia emulation control for high-speed flywheel energy storage systems

Karrari, Shahab; Baghaee, Hamid Reza; Carne, Giovanni ORCID iD icon; Noe, Mathias ORCID iD icon; Geisbuesch, Joern


Low-inertia power systems suffer from a high rate of change of frequency (ROCOF) during a sudden imbalance in supply and demand. Inertia emulation techniques using storage systems, such as flywheel energy storage systems (FESSs), can elp to reduce the ROCOF by rapidly providing the needed power to balance the grid. In this work, a new adaptive ontroller for inertia emulation using high-speed FESS is proposed. The controller inertia and damping coefficients vary using a combination of bang–bang control approaches and self-adaptive ones, to simultaneously improve both the ROCOF and the frequency nadir. The performance of the proposed adaptive controller has been initially validated and compared with several existing adaptive controllers by means of offline simulations, and then validated with experimental results. The proposed controller has been implemented on a real 60 kW high-speed FESS, and its performance has been evaluated by means of power hardware-in-the-loop (PHIL) testing of the FESS in realistic grid conditions. Both Simulations and PHIL testing results confirm that the proposed inertia emulation control for the FESS outperforms several previously reported controllers, in terms of reducing the maximum ROCOF and improving the frequency nadir during large disturbances.

Preprint §
DOI: 10.5445/IR/1000125029
Veröffentlicht am 15.12.2020
DOI: 10.1049/iet-gtd.2020.0066
Zitationen: 26
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2020
Sprache Englisch
Identifikator ISSN: 1751-8687, 1751-8695
KITopen-ID: 1000125029
HGF-Programm 37.06.01 (POF III, LK 01) Networks and Storage Integration
Erschienen in IET generation, transmission and distribution
Verlag Institution of Engineering and Technology (IET)
Band 14
Heft 22
Seiten 5047-5059
Projektinformation GRK 2153/1 (DFG, DFG KOORD, GRK 2153/1)
Vorab online veröffentlicht am 15.10.2020
Schlagwörter Flywheels, Energy storage, frequency control, inertia emulation, power hardware-in-the-loop
Nachgewiesen in Dimensions
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