Harmonic elimination in multiple synchronous rotating reference frames of PMSG for wind power generation

Harmonic currents elimination are significant for improving efficiency and reliability for wind power system with PMSG. Several factors can induce harmonic current, in which the most significant is back EMF distortion. In order to compensate the voltage distortion, we propose a harmonic elimination method in multiple synchronous rotating reference frames in this paper. Different orders of current harmonics are transformed into their corresponding synchronous rotating frames respectively and PI regulators are used to compensate the voltage distortion, which are implemented in parallel with the fundamental regulator. Experiments are carried out to verify the effective of the proposed method, providing good voltage compensation results.