Method for controlling steam generators
AssigneeWestinghouse Electric Corp.
InventorJagannathan Seenu Srinivasan
Life of this patent
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Abstract
A method of controlling the feedwater flow to the secondary side of a steam generator in a pressurized water nuclear reactor monitors various process variables such as the feedwater and the steam flows and pressures around the secondary side of the steam generator and then generates process signals based upon the process variables. An error signal based upon selected process signals is generated. The error signal is filtered by a deadband filter network for generating a control signal with a deadband. The control signal with a deadband is sent to a proportional-integral controller for generating a demand signal. The demand signal is then sent to an operator such as feedwater valve positioner or a feedwater pump speed controller for controlling the feedwater flow into the steam generator.
Claims10
A method of controlling feedwater flow to the secondary side of a steam generator in a pressurized water nuclear reactor, comprising the steps of:
- monitoring process variables around the secondary side of the steam generator;
- generating process signals based upon the monitored process variables;
- generating an error signal based upon at least one of the process signals;
- filtering the error signal to generate a control signal with a deadband;
- sending the control signal with a deadband to a proportional-integral controller to generate a demand signal;
- and
- sending the demand signal to an operator for controlling the feedwater flow.
Dependencies are inferred from the claim text.