초록

A coordinated control technique and arrangement for a steam power generating system is disclosed in which combined megawatt error and turbine pressure error signal are used to control the turbine control valve and the fuel flow to the boiler.

대표청구항 ▼

A method of operating an electric power generation system, the system being of the type having an electric generator, a steam turbine connected to the electric generator, a steam generator for supplying steam to the turbine, a flow line interconnected between the steam generator and the turbine for

A method of operating an electric power generation system, the system being of the type having an electric generator, a steam turbine connected to the electric generator, a steam generator for supplying steam to the turbine, a flow line interconnected between the steam generator and the turbine for the passage of steam, throttle valve means in the flow line for regulating turbine throttle pressure, and fuel flow regulating means for regulating heat input to the steam generator, comprising the steps of measuring throttle pressure, producing a feed-forward proportional signal based on load demand for the turbine, developing a throttle pressure error signal representative of the difference between said measured throttle pressure signal and a throttle pressure setpoint, measuring electrical load output of the electric generator, producing a feedforward proportional signal based on load demand for the boiler, developing a megawatt error signal representative of the difference between said measuring electrical output signal and a unit load demand, and further comprising, during transient operation, combining said throttle pressure error signal and said megawatt error signal to produce (1) a first combined signal corresponding to the difference of said megawatt error signal and said throttle pressure error signal, and biasing the throttle valve controls by means responsive to said first combined signal, and (2) a second combined signal corresponding to the sum of said megawatt error signal and said throttle pressure error signal, and biasing the fuel flow control by means responsive to said second combined signal.