FIELD: electricity.
SUBSTANCE: invention refers to electric engineering. Phase and value of command vector of input current of virtual input converter are controlled for controlling the value of virtual DC voltage. Intermediate voltage between input lines, and zero voltage vector are used when command vector of input current is in the zone of low output voltage, and maximum voltage between input lines and intermediate voltage between input lines are used in the zone of high output voltage. Control by means of pulse-width modulation (PWM) in virtual output inverter allows decreasing the number of divisions of one working period into control pulses. Output voltage in low voltage zone is controlled by means of intermediate voltage between input lines. In high voltage zone, virtual direct current is set as maximum and constant, and control is performed by means of pulse-width modulation in virtual output inverter. Switching configuration is determined by means of the mode in which zero voltage vector is connected to intermediate input phase.
EFFECT: decreasing upper harmonics and common-mode voltage in zone of low voltages and improving minimum pulse width parametre owing to decrease of error of output voltage and fluctuation of pulse voltage.
8 cl, 21 dwg
