FIELD: electrical engineering; three-phased static converter with unbalanced load.
SUBSTANCE: according to the method, the instantaneous value of the three-phase output variable of the converter, the voltage or current are measured, the zero-phase sequence of the output variable is separated out, the calibration signal for the zero-phase sequence equal to zero is formed, a comparison signal is formed by substracting the zero-phase sequence from the calibration signal, a three-phase control signal is formed for stabilization or adjustment of the output variable, voltage or current parameters, a three-phase modulating converter signal is formed, harmonic components with high amplification gain are separated out in the comparison signal, a feedback signal of the zero-phase sequence is formed by combining the separated harmonic components, and the said modulating signal is formed by combining the feedback signal with the control signals of all phases.
EFFECT: increase of the three-phase output signal (voltage or current) quality by means of suppressing the zero-phase sequence which appears in the output signal if the load in unbalanced.
1 dwg
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