A No Parameter Predictive Current Control Method for Independent Brushless Doubly-fed Induction Generator

Abstract

The invention discloses a parameterless predictive current control method of an independent brushless double-fed induction generator, which belongs to the technical field of brushless double-fed induction generator control. The method includes: real-time monitoring of the control winding voltage and current information of the motor at the previous two moments and the current moment, calculating the predicted current with delay compensation, and determining the optimal switching state of the power electronic device in the control winding side converter through the cost function , and finally use the single-vector modulation algorithm to determine the duty cycle and generate a reasonable and effective switching sequence to drive the control winding side converter to realize real-time control of the control winding current. The control method predicts and controls the winding current through real-time motor state information, which can effectively avoid dependence on motor parameters. The control system is hardly affected by changes in motor parameters, and has strong robustness and more stable operation.

Description

technical field [0001] The invention belongs to the technical field of brushless doubly-fed induction generator control, and more specifically relates to a parameter-free predictive current control method of an independent brushless doubly-fed induction generator. Background technique [0002] The brushless double-fed induction generator is a new type of AC induction motor, which contains two sets of stator windings with different numbers of pole pairs. The rotor is specially designed so that the rotating magnetic fields with different numbers of pole pairs generated by the two sets of stator windings can indirectly interact with each other. function to achieve energy transfer. The two sets of stator windings of the brushless doubly-fed motor are called the power winding and the control winding respectively. Compared with the brushed doubly-fed induction generator, it cancels the brushes and slip rings, and has the advantages of simple structure and high reliability. [000...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a parameterless predictive current control method of an independent brushless doubly-fed induction generator, and its purpose is to solve the model predictive control of the traditional independent brushless doubly-fed induction generator method, relying too much on model quality and motor parameters, resulting in technical problems of low reliability of system operation

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