| 摘要 |
PURPOSE:To obtain operations of high efficiency all the time by a method in which MAIN steam pressure is controlled according to a set load and the opening degree of a control valve to be regulated prior to said control is set to ones at which throttle loss is smaller as the actual output of the turbine generator comes near the set load. CONSTITUTION:A load set value signal is sent out of a boiler master 16 on the basis of power supply command from a power supply commander 15, and the output is converted into a set pressure signal and a valve opening signal by converters 17 and 20. The set pressure signal is compared with pressure detection signals from a principal steam pressure sensor 18 at high and low values preferential gates 26 and 27, and any output signal of the gates 26 and 27 is sent out through a selector 28 and compared with the set pressure signal. A pressure deviation signal is obtained thereby, and a signal obtained by adding load set value signal and the actual output signal of the turbine generator from a scale factor device 29 to the deviation signal is sent out to a boiler controller 19 to control the burners and water supply. |
