METHOD FOR SETTING VOLTAGE UNBALANCE IN THREE-PHASE SYSTEM Russian patent published in 1994 - IPC

FIELD: current conversion. SUBSTANCE: reference voltage components for each sequence are shaped as single-phase and relatively cophasal. First phase voltage of specified three-phase system is obtained by summing them up like two auxiliary orthogonal voltages; first of them is brought in phase with first phase voltage and set equal in amplitude to reference zero-sequence voltage component reduced by half-sum of amplitudes of reference voltage components of forward and reverse sequences; second orthogonal voltage is set equal in amplitude to forward-sequence reference voltage component reduced by amplitude of reverse-sequence reference voltage component; then second phase voltage of specified three-phase system is shaped as difference between first orthogonal voltage and second one increased times; third phase voltage is shaped as sum of the latter. EFFECT: enlarged functional capabilities. 2 dwg