Patent ID: 8494684
Filing Date: 2013-07-23
Classification: G06F,G06Q,H02H,H02J,Y02E,Y04S

Abstract:
1. A substation automatic control system, comprising: a voltage/effective-power adjusting transformer, which is installed between a main bus of a substation and a transmission line, and which includes a voltage tap and a phase tap; an automatic power adjusting apparatus configured to obtain electrical parameters of the transmission line via an instrument transformer, to calculate an effective power of the transmission line, and to output a phase-tap control command to the phase tap of the voltage/effective-power adjusting transformer, to suppress the effective power to a value smaller than a predetermined value when the effective power exceeds the predetermined value; and an automatic voltage adjusting apparatus configured to obtain the electrical parameters of the transmission line via the instrument transformer, to calculate a system voltage of the transmission line, and to output a voltage-tap control command to the voltage tap of the voltage/effective-power adjusting transformer, to make the system voltage fall within a predetermined range, wherein the automatic power adjusting apparatus activates the automatic voltage adjusting apparatus when the phase tap is controlled, the automatic voltage adjusting apparatus activates the automatic power adjusting apparatus when the voltage tap is controlled, and the automatic power adjusting apparatus suppresses the effective power of the transmission line to the value smaller than the predetermined value while the automatic voltage adjusting apparatus is performing an automatic control, to maintain the system voltage within the predetermined range.