Energy conversion charging method and system with high power factor

Abstract

The present application relates to the technical field of energy conversion, and particularly relates to an energy conversion charging method and system with high power factor, the method comprising: obtaining input voltage, input current, bus parameter, charging state and output side parameter; performing phase tracking and power factor state representation based on the input voltage and the input current, and generating a target input current reference waveform; determining a target charging power requirement according to a current charging stage, and generating a bus power adjustment instruction in combination with the bus parameter; and then coordinating and adjusting the amplitude of the target input current reference waveform according to the bus power adjustment instruction to obtain a target current control quantity. By unifying input side current shaping, bus power coordination and output side charging stage control in the same control framework, smooth adjustment of the input current in the charging stage switching process is realized, input current distortion and power factor fluctuation are suppressed, and the input side power quality is improved while the charging stability and conversion efficiency are ensured.

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