Method and apparatus for controlling the control valve setpoint

Details Method and apparatus for controlling the control valve setpoint Method and apparatus for controlling the control valve setpoint

1983-12-16

1986-03-18

Lall, Parshotam S.

Boots, shoes, and leggings

60660, F01D 1702

Patent

active

045772819

ABSTRACT:
A microprocessor-based controller for an extraction type steam turbine-generator unit capable of selecting from a variety of predetermined control strategies and implementing corresponding valve position control loops by generating appropriate valve position control signals in accordance with operator-chosen setpoint signals and turbine operating level signals. In a particular control strategy, automatic compensation of megawatt output is achieved during the extraction mode of turbine operation by summing a megawatt setpoint signal from a feedback loop with a feedforward extraction valve setpoint signal and a megawatt reference signal, which sum is then applied to the turbine control valves to enable tight megawatt control during the extraction operation.

REFERENCES:
patent: 4057715 (1977-11-01), Jones et al.
patent: 4205380 (1980-05-01), Braytenbah
patent: 4220869 (1980-09-01), Uram
patent: 4245162 (1981-01-01), Ronnen et al.
patent: 4471446 (1984-09-01), Podolsky et al.

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