DEVICE AND METHOD FOR STABILIZING SYSTEM FREQUENCY

PROBLEM TO BE SOLVED: To quickly set and keep system frequency in a predetermined rated frequency range when automatic frequency control signal is input. SOLUTION: A frequency adjustment load command operation part 20 of a plant integrated control device 15 operates frequency adjustment load command signal AFCr based on automatic frequency control signal AFC, and correction operation part 21 operates correction signal corresponding to fluctuation of generator output by the frequency adjustment load command signal AFCr. Correction frequency adjustment load command signal AFCa is calculated by adding correction signal on frequency adjustment load command signal AFCr, and is added on load command signal DPC and is output as output command value MWr of the generator 14. A boiler control device 16 controls a boiler to form steam corresponding to output command value MWr. A turbine control device 17 controls a turbine to set generator output MW to output command value MWr and controls system frequency in a predetermined range of rated frequency. COPYRIGHT: (C)2008,JPO&INPIT