A multi-mode control method and device for energy storage converter

Abstract

The present disclosure relates to a kind of energy storage converter multi-mode control method and device.Wherein, the method includes: for energy storage converter in grid-connected mode, by creating second-order infinite impulse response IIR filter, establish low voltage ride through control strategy based on compliance repeat control;For energy storage converter in off-grid mode, three-phase four-bridge topology is used to provide zero sequence path, establish preset proportional resonant control strategy;For energy storage converter in grid-constructing mode, establish parallel pre-synchronization control strategy;Low voltage ride through control strategy based on compliance repeat control, preset proportional resonant control strategy, parallel pre-synchronization control strategy are used to realize multi-mode control to the energy storage converter.The present disclosure can set any resonant frequency and filter radius to suppress the resonant peak, ensure system stability, compared with traditional pre-synchronization method only using its frequency modulation characteristics, without additional control link can complete pre-synchronization, greatly save control resources.

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