| 摘要 |
PURPOSE:To localize abnormality and to confine the influence of abnormality, by arranging a control monitor at a main point in load area of power system then detecting power flow and voltage and monitoring variation rate thereof while further controlling a phase regulator. CONSTITUTION:Control monitors 17, 18 are arranged near to a load area of a power system, e.g. secondary substations 11, 12. The control monitors 17, 18 measure load voltage and reactive power flow at a load end, then variation rate of effective and reactive power is determined based on the measurements so as to monitor power flow. Shortcircuit capacity of the power system variable with time is calculated and employed together with a constant power load as reference for calculating a power stabilization limit. Then a phase regulator 11Z (shunt reactor 11ZL, shunt capacitor 11ZC) is controlled with a time limit suitable for the sharpness of voltage variation. |
