초록 ▼

A programmed digital computer control system determines the turbine steam flow changes required to satisfy the speed and load demand made on the operation of a large electric power stream turbine for which substantially constant throttle pressure steam is generated. Load control is directed to plant

A programmed digital computer control system determines the turbine steam flow changes required to satisfy the speed and load demand made on the operation of a large electric power stream turbine for which substantially constant throttle pressure steam is generated. Load control is directed to plant electric power generation and it is based on feedforward valve positioning operation with feedback multiplication calibration for plant load and/or turbine speed error. Changes in the turbine operating level are limited by dynamic constraints applied by the computer.

대표청구항 ▼

A system for operating a steam turbine comprising nonlinear operating steam valve means for determining the flow of steam through at least one section of the turbine, means for determining a representation of the actual value of at least one variable turbine condition selected from the turbine speed

A system for operating a steam turbine comprising nonlinear operating steam valve means for determining the flow of steam through at least one section of the turbine, means for determining a representation of the actual value of at least one variable turbine condition selected from the turbine speed condition and the turbine load condition, programmed digital computer means having a reference representation of said one turbine condition, said computer system further having means for generating at least one predetermined linearizing characterization to offset the nonlinear relationship of valve position to steam flow, said digital computer means having means for generating position control signals for said valve means in accordance with the reference representation and the linearizing characterization and the actual condition representation, and means for controlling said valve means in accordance with the determined position control signals.