Design of a coordinated control unit for the charge process of a flywheel energy storage unit based on passivity and backstepping methods

doi:10.12028/j.issn.2095-4239.2018.0213

Abstract

Abstract: A step-by-step design method based on dual-input is proposed to address issues associated with non-linear factors in the control of a flywheel energy storage unit. This was based on an effective combination of the Backstepping control and passivity methods, enabling the flywheel system speed and current output stabilized. First, the Backstepping method was used to design the q-axis controller of the flywheel during charge. The d-axis controller of the system was designed by coordinating the passivity, making the whole system passive and hence ensuing the asymptotic stability of the system. The whole design process did not use any linearization treatment, ensuring the applicability of the whole control model in the non-linear system and hence an improved stability performance of the system. Simulations were then performed and the results validated the proposed control strategy.

Key words: flywheel energy storage, Backstepping control, coordination passivity, Lyapunov function

CLC Number:

TH133

MIAO Yonglai, WANG Bing, CHEN Xianhui, LI Wei. Design of a coordinated control unit for the charge process of a flywheel energy storage unit based on passivity and backstepping methods[J]. Energy Storage Science and Technology, 2019, 8(2): 365-370.

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