System-Level Optimization of Flux-Switching Machines With Multiple Excitation Sources in a Long-Term Flywheel Energy Storage System
Year: 2025
Type: conference-paper
Abstract: This paper presents the optimization of a LongTerm Flywheel Energy Storage System (LT-FESS) whose electromechanical converter is a Flux-Switching Machine (FSM). Three topologies of FSM that differ with their excitation source are investigated: the Permanent Magnet FSM (PM-FSM), Wound-Field FSM (WF-FSM) and the Hybrid-Excited FSM (HEFSM). The design parameters of the machines, as well as those of the power electronics and of the rotor of a$10 k W$and$10 k W h$LTFESS, are optimized according to energy and economic metrics. The maximization of the energy efficiency of storage cycles of increasing storage durations shows that the HE-FSM is the bestsuited topology for intermediate storage durations with energy efficiencies above 70 % for storage cycles shorter than 7 hours. Beyond, the WF-FSM becomes more efficient thanks to its lower idling losses. The PM-FSM is never observed as the best-suited topology regardless of the storage duration.
Authors: François Boulanger, Bruno Dehez
Institution: UCLouvain
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4416961408