The introduction of flywheel energy storage systems (FESS) in the urban rail transit power supply systems can effectively recover the train’s regenerative braking energy and stabilize the catenary voltage. Due to the small capacity of the single-flywheel energy storage systems, it’s difficult to meet the energy absorption demand of train regenerative braking. The flywheel energy storage arrays (FESA) is an effective means to solve this problem, however, there are few researches on the control strategies of the FESA. In this paper, firstly analyzed the structure and characteristics of the urban rail transit power supply systems with FESA, and established a simulation model. On this basis, a FESA control strategy based on the “voltage-speed-current” three closed-loop control was proposed: the voltage closed-loop adopted a multi-voltage thresholds method to enhance the energy-saving and voltage-stabilizing performance. The speed closed-loop directly adjusted the flywheel speed to achieve the SOC management and coordinated control of the flywheel units. The current closed-loop used a control method that combines the maximum torque current ratio (MTPA) and the leading angle flux-weakening to reduce the loss of the FESA and ensure the output power at high speed. Finally, the correctness of the control strategy of the FESA was verified by simulation and experimental platform tests.
Control Strategy of Flywheel Energy Storage Arrays in Urban Rail Transit
Lect. Notes Electrical Eng.
International Conference on Electrical and Information Technologies for Rail Transportation ; 2021 October 21, 2021 - October 23, 2021
Proceedings of the 5th International Conference on Electrical Engineering and Information Technologies for Rail Transportation (EITRT) 2021 ; Kapitel : 5 ; 41-51
2022-02-22
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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