Study on the no-load excitation control of VSCF wind-power generation system combined with LADRC

By analyzing the excitation behavior of no-load cutting-in of double-fed induction generator (DFIG), the mathematical model based on the stator flux orientation is established. For the slow dynamic response and large steady-state error generated by parametric uncertainties of inductive resistance and reactance that wind-power generation system has at traditional control methods, by using the advantages of the linear active disturbance rejection control (LADRC) in processing system internal perturbation and external disturbance, a controller based on LADRC is designed. The method is applied to a 850kW variable speed constant frequency wind turbine and the simulation results show that the new method not only causes the wind turbine system to quickly achieve cutting-in condition, but also has strong robustness of the wind turbine parameters perturbation.