ISA 77.43.01-2002 (R2008)
- Fossil Fuel Power Plant Unit/Plant Demand Development - Drum Type
- standard by The International Society of Automation, 12/30/2002
- Category: ISA
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The scope of this document is to address the unit/plant demand development subsystem for boilers withsteaming capacities of 200,000 lbs/hr (25 kg/s) or greater. This subsystem includes firing rate demanddevelopment, throttle/header pressure control, and unit megawatt/steam flow control as applicable.
This document will address two types of process applications:
a) a single boiler supplying a single turbine, typical of an electric utility power plant; and
b) a single boiler or multiple boilers supplying a common distribution header, typical of an industrialpower plant.
Specifically excluded from consideration are:
a) dispatch control;
b) turbine/generator control (other than turbine demand);
c) combustion controls (covered separately by ANSI/ISA-77.41-1992, Fossil Fuel Power Plant BoilerCombustion Controls);
d) steam distribution control systems;
e) economic loading of boilers; and
f) fluidized bed boilers.
This document will address two types of process applications:
a) a single boiler supplying a single turbine, typical of an electric utility power plant; and
b) a single boiler or multiple boilers supplying a common distribution header, typical of an industrialpower plant.
Specifically excluded from consideration are:
a) dispatch control;
b) turbine/generator control (other than turbine demand);
c) combustion controls (covered separately by ANSI/ISA-77.41-1992, Fossil Fuel Power Plant BoilerCombustion Controls);
d) steam distribution control systems;
e) economic loading of boilers; and
f) fluidized bed boilers.
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