POWER MINIMIZER OF THYRISTOR-TYPE REACTIVE-POWER COMPENSATOR FINAL ELEMENT Russian patent published in 1997 - IPC

FIELD: electrical engineering; reactive power correction in three-phase sharply-variable loads of industrial enterprises by means of static thyristor compensators with thyristor-reactor final element. SUBSTANCE: working point of thyristor-reactor group is selected automatically. Variations in load reactive power are brought down to desires value at any load variations at minimal power of thyristor-reactor group irrespective of particular power of condenser bank of compensator. Automatic selection of working point is effected due to dynamic (at high time constant) storage of peak-to-peak variations in load reactive power. This peak-to-peak value with definite factor depending on deviation from standard supply voltage fluctuations sets up working point of thyristor-reactor group at minimal level. Coefficient computing channel is astatic and maintains minimal initial offset of working point for each phase of thyristor-reactor group in all possible operating conditions of load. EFFECT: provision for minimizing power in all possible load conditions. 2 dwg