Aggregation of doubly-fed induction generator based wind farm considering storage device and coordinated control strategy

High penetration of wind power have prominent impact on the transient stability of transmission system. A simulation platform considering doubly-fed induction generator(DFIG), storage device and control strategies is built on the basis of MATLAB/SIMULINK software. For the sake of constructing the equivalent model of wind farm, a classification method was proposed which is based on fuzzy membership analysis that combining weight and single factor judgement matrix. For convenience, the output power and the similarities between transient response of DFIGs were selected as weight and affiliation degree. Qualitative and quantitative analysis were discussed through using single-machine model and multi-machine model of wind farm, furthermore, the adaptability and generalization ability were evaluated by means of perturbation analysis and the results show that the equivalent approach is rational and effective.