Control method for fault ride-through of flywheel energy storage system based on multi-mode coordination

doi:10.19799/j.cnki.2095-4239.2020.0104

Abstract

Abstract:

The flywheel energy storage system (FESS) is a form of energy storage with a high dynamic response performance. This study proposes a fault ride-through control strategy suitable for the FESS based on the analysis of the operating characteristics of the system under low- and high-voltage faults in the power grid. The proposed control strategy is applicable to both symmetric and asymmetrical faults in the power grid. Through a multi-mode coordinated control of the grid- and machine-side converters during the low- and high-voltage faults of the power grid, the proposed method enables a continuous non-off-grid operation of the flywheel energy storage grid-connected system. At the same time, it can meet the fault ride-through operation requirement of the FESS being able to provide a certain reactive power support to the grid during fault. The effectiveness of the proposed control strategy is verified by a simulation. Moreover, the fault ride-through capability of the flywheel energy storage grid-connected system is evaluated.

Key words: flywheel energy storage system (FESS), fault ride-through, multi-mode coordinated control strategy, reactive power support

CLC Number:

TQ 028.8

Wencan LI, Jingliang LV, Xinjian JIANG, Xinzhen ZHANG. Control method for fault ride-through of flywheel energy storage system based on multi-mode coordination[J]. Energy Storage Science and Technology, 2020, 9(6): 1905-1916.

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