FIELD: power industry.
SUBSTANCE: steam pressure is controlled by a position of a feed water valve of a steam generator as per a signal of steam pressure deviation from its setpoint. Speed of the feed water pump is controlled as per a deviation of a feed water flow rate signal from its setpoint, and the feed water flow rate signal is adjusted as per the signal of steam pressure deviation from its setpoint. The feed water valve is controlled in turn as per the signal of steam pressure deviation from its setpoint or as per deviation of the valve position from its setpoint. Priority of control is set by control priority of steam pressure prior to control of the valve position. The position setpoint of the feed water valve is changed depending on the specified operating mode of the plant.
EFFECT: improving quick action of a steam regulator and reducing its error.
8 cl, 1 dwg
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Authors
Dates
2015-10-20—Published
2014-07-03—Filed