Study of harmonic compensation for six-phase PMSG in fault tolerant control

For the serious third harmonic effect in one phase opening mode of six-phase permanent magnet synchronous generator (SP-PMSG), an extended stationary transformation matrix is established. According to this matrix and rotational frame matrix, the model of voltage and torque was established, and the second rotational frame transformation was proposed for eliminating the coupling relationship of d-q voltage. To eliminate the third harmonic effect in closed loop control of SP-PMSG fault-tolerant mode, according to the stator copper loss minimum (SCLM) constrained condition, an offline calculated compensation voltage compensation expression was deduced. Simulation and experiments validate the effectiveness of the proposed compensation control strategy, and improve the performance of SP-PMSG in post-fault application.