| 摘要 |
PURPOSE: To obtain a multi-functional SVC controller which compensates reactive power accompanied by the load fluctuation of a system bus and controls voltage fluctuation caused by a transformer rush current, which is generated by supply of the transformer. CONSTITUTION: A switching switch 31 switch-connecting the input terminal 37 of a pulse generation circuit 20 to either the output terminal 35 or 36 of a multiplier 18 and LPF 19 is installed between a low pass filter(LPF) 19 for detecting instantaneous reactive power and the pulse generator 20 detecting load reactive power from instantaneous reactive power to phase-control a thyristor 8 in the SVC control circuit 10 phase-controlling the thyristor 8 of SVC 6 provided with TCR 4 consisting of the thyristor 8 and a reactor 7. Then, only during a fixed time from the time of supplying a transformer 12 to the system bus 3 by a transformer supply command signal (m) to generate the transformer rush current (i) to the time that the current does not exist, the switching switch 31 is switched to the side of the output terminal 35 of the multiplier 18 by means of an instantaneous compensation circuit 30 to control the voltage fluctuation of the system bus 3 caused by the transformer rush current (i). |
