STEPWISE IDENTIFICATION METHOD OF CONVERTER CONTROL PARAMETERS FOR DOUBLY-FED INDUCTION GENERATORS
In this paper,the inner and outer loop transfer functions of the rotor-side and grid side control systems of doubly-fed wind turbines containing eight PI controllers to be identified are constructed as the parameter identification model,based on which an excitation method with different disturbance sources applied to the inner and outer loops and a stepwise parameter identification method based on the improved Gray Wolf algorithm are proposed.Among them,in order to avoid the cascade problem between the inner and outer loop PI controllers,three reasonable inner and outer loop observations are especially selected.Finally,a simulation model of the doubly fed wind turbine is established to test the feasibility of the proposed stepwise identification method,and the results show the accuracy of the identification method by comparing the observed output of the actual model and the identification model under perturbation.
converterparameter identificationtransfer functiondouble fed wind turbinegrey wolf algorithm
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