A three-phase Vienna rectifier inductance parameter identification method

Abstract

The application discloses a three-phase Vienna rectifier inductance parameter identification method, comprising the following steps: obtaining a first mathematical model of a Vienna rectifier in a two-phase rotating coordinate system; introducing a disturbance voltage component into the first mathematical model; discretizing the first mathematical model to obtain a discrete mathematical model; taking the disturbance voltage component as a state variable to construct a full-order state observer to realize real-time observation of the disturbance voltage; and discretizing a disturbance voltage state equation to realize online identification of inductance parameters. The three-phase Vienna rectifier inductance parameter identification method provided by the embodiment of the application can better simulate the actual working conditions of the change of inductance parameters when the three-phase Vienna rectifier system is running by introducing the disturbance voltage, and the accuracy of the mathematical model is improved. By constructing a discrete full-order state observer, the change of the disturbance voltage is observed in real time, the tracking performance of the current is improved, and the safe and stable operation of the three-phase Vienna rectifier system is ensured.

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