Voltage type reversible rectifiers control methods in unbalanced and nonsinusoidal conditions

This paper presents four unity power factor PWM voltage rectifier/inverter control circuits. The first control system is realised directly in the nonrotating /spl alpha//spl beta/ referential. The second control system is based on the synchronous reference frame method. The third one is based on the instantaneous active and reactive powers pq method. The last one is based on the instantaneous active and reactive currents id-iq method. These control methods are analysed under unbalanced and nonsinusoidal mains voltage conditions.