METHOD FOR CONTROLLING SUPPRESSING DEVICE OF FLICKER

摘要

PURPOSE:To stabilize a control operation, by inputting the synthesized value of current flowing into current transformers on the secondary sides of plural load transformers connected to a bus and the output of a transformer connected to the bus to a controller and controlling a flowing angle by the output of the controller. CONSTITUTION:The current transformers CT1-CTn are connected to the secondary sides of plural load transformers Tr1-Trn connected to the bus BUS and the current values are synthesized by a synthesized current signal generator TCT and applied to a controller CONT. The voltages of the bus BUS is lowered by a transformer PT and applied to the controller CONT. The output of the controller CONT controls the arc angle of an SCR connected to the secondary side of a transformer TrF for a flicker suppressing device to adjust the inflow current of reactor L. Consequently, voltage variation generated by the variation of loads L1-Ln is effectively suppressed by the geometrical effect of fixing capacitors C1, C2 and a stable operation is attained even at the time of a low load.