The islanding start and operation control of doubly-fed wind generation system

Firstly, this paper studies the meaning of doubly-fed wind generation system in islanding operation. The mathematical model of DFIG(Doubly Fed Induction Generator) is deduced. With the use of storage system, this paper researches the control strategy of doubly-fed wind power system´s islanding start and operation which include idle-load start and load start based on stator flux oriented, and compares the advantages and disadvantages of the two starting methods. Secondly, in order to improve the utilization of wind energy, this paper study the control strategy of the load-side converter and the rotor-side converter when the doubly-fed wind power system is in islanding operation, which achieve the decoupling control of stator active and reactive power independently and ensure voltage amplitude and frequency´s stability of the load. Finally, simulation platform is built with the MATLAB software, which completes the simulation of the above-mentioned control strategy, and the experiment is done. It promotes the application of double-fed generation in micro-grid and improves wind energy utilization