Integrated intertial coordination control of doubly-fed wind turbines based on fuzzy control
Integrated Inertial Control(IIC)is widely used in the primary FM of doubly-fed fans for its advantages of fast response speed and small energy requirement.In order to give full play to the effect of integrated inertial control on primary FM of doubly-fed fans,an integrated inertial coordinated control strategy based on fuzzy control and frequency deviation is proposed.Firstly,the traditional fixed integrated inertia control coefficients are analyzed for their influence on the FM of doubly-fed fans,and the necessity of dynamically adjusting the control coefficients is concluded.Secondly,the additional fuzzy controller makes the control coefficients dynamically adjusted following the wind speed and frequency,and the virtual inertia control and sag control are coordinated to produce power based on the weighting factor of frequency deviation according to the different states of frequency.Finally,the simulation model is established in MATLAB/SUMILNK and the primary frequency regulation effect of the strategy proposed in this paper is verified under different wind speed step load perturbations.The results show that the strategy proposed effectively improves the integrated inertia control primary FM capability of doubly-fed wind turbine,improves the stability of the power system,and has a certain degree of economy and better robustness.
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