| 摘要 |
PROBLEM TO BE SOLVED: To provide a system frequency stabilizing device which copes with many factors that arise, when accurately balancing between supply and demand, if the route of a trunk line is interrupted by a system accident.SOLUTION: A power system frequency stabilizing device 1 includes: a means for always measuring the output of generators 4 in a system and a load power-flow value of a main transformer substation; an accident-signal transmitting means for transmitting an accident signal to a system frequency stabilizing means, when an accident is detected; a part for preliminarily calculating a control amount that preliminarily calculates a control amount required, when the system accident occurs by using an electric-circuit model in the system and on-line data; and a correction control amount calculating part for calculating a correction control amount, on the basis of the generator drop amount, load drop amount, and observation value of a change in system frequency. Consequently, control with a required minimum control amount is executed and effects on the system based on excessive control are avoided, and thereby quick, stable, and accurate convergence of the frequency oscillation of a separated system to a target value is available. |
