초록 ▼

A system for intelligently governing the selection of one of a boiler follow or turbine follow mode of control of a steam turbine power plant is disclosed. Boiler and turbine master controllers are concurrently operative in one of the boiler follow and turbine follow modes for controlling the firing

A system for intelligently governing the selection of one of a boiler follow or turbine follow mode of control of a steam turbine power plant is disclosed. Boiler and turbine master controllers are concurrently operative in one of the boiler follow and turbine follow modes for controlling the firing rate of the plant boiler or positioning the steam admission valves of the steam turbine, respectively. Each of the boiler and turbine master controllers are operative to respectively generate a first and second plurality of signals which are representative of plant control status. A selecting means is disposed as an integral part of the plant controls for switching between the turbine follow and boiler follow control modes. Accordingly, the disclosed system intelligently governs the selecting means to switch the plant control to the boiler follow mode in accordance with a first set of predetermined plant control conditions and to switch the plant control to the turbine follow mode in accordance with a second set of predetermined plant control conditions wherein the first and second sets of predetermined plant control conditions are established from the first and second plurality of signals.

대표청구항 ▼

In a steam turbine power plant having a boiler for generating steam to a steam turbine which is mechanically coupled to an electrical generator which generates electrical energy at a desired power generation level and including a boiler master controller for controlling boiler firing rate, said boil

In a steam turbine power plant having a boiler for generating steam to a steam turbine which is mechanically coupled to an electrical generator which generates electrical energy at a desired power generation level and including a boiler master controller for controlling boiler firing rate, said boiler controller being operative to generate a first plurality of status signals representative of plant control status; a turbine master controller for controlling a plurality of turbine steam admission valves, said turbine controller being operative to generate a second plurality of status signals representative of plant control status; said boiler and turbine master controllers being concurrently operative in one of a boiler follow and turbine follow control mode; and selecting means for switching the mode of control of said power plant between said boiler follow and turbine follow modes, a system for governing said selecting means comprising: means for governing said selecting means to switch power plant control to said boiler follow control mode in accordance with a first set of predetermined plant control conditions established from said generated first and second plurality of status signals; and means for governing said selecting means to switch power plant control to said turbine follow control mode in accordance with a second set of predetermined plant control conditions established from said generated first and second plurality of status signals.