Aiming at the problem of harmonic pollution in doubly-fed wind farms, this paper proposes to apply a chained STATCOM with a resonance controller function to doubly-fed wind farms. The mathematical model of the chain STATCOM with the function of the resonant controller is analyzed, and then the control characteristics of the resonant controller are improved. A PIR-VPI hybrid control method with low harmonic suppression is proposed. The working principle of the hybrid control method is studied, and a mathematical model is established, and the parameters are designed and verified in MATLAB. Theoretical analysis and simulation results verify the effectiveness of this scheme in harmonic suppression in doubly-fed wind farms.
