Power plants – Motive fluid energized by externally applied heat – Having apparatus cleaning – sealing – lubricating – purging,...
Patent
1988-11-10
1989-12-26
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Having apparatus cleaning, sealing, lubricating, purging,...
60646, F01K 1302
Patent
active
048889539
ABSTRACT:
A boiler/turbine plant controlling apparatus comprises a circuit for driving a turbine inlet steam flow regulator valve on the basis of a difference between a load command signal adjusted by a thermal stress value of a turbine and an actually measured output signal of a plant; a circuit for driving a boiler feed water flow regulator valve on the basis of a difference between a value which is obtained by adding a boiler feed water amount with a super heater feed water amount and a value represented by a boiler input command signal; a circuit for driving a fuel flow regulator valve in accordance with an actually measured fuel amount and a fuel command signal corrected by a difference signal between a primary steam temperature setting signal and a steam temperature signal representative of a primary steam temperature measured value; a circuit for driving a super heater water feed valve on the basis of a difference value between the primary steam temperature setting signal and the steam temperature signal; a circuit for calculating a steam temperature drop through the steam flow regulator valve on the basis of an opening degree of the steam flow regulator valve disposed at an inlet of the turbine and a temperature and pressure of steam at the inlet of said steam flow regulator valve; and a circuit for correcting the steam temperature setting signal on the basis of the calculated value of the calculating means.
REFERENCES:
patent: 4589255 (1986-05-01), Martens
patent: 4651533 (1987-03-01), Ura et al.
patent: 4792912 (1988-12-01), Kuramoto et al.
Fukayama Yukio
Kawano Shigeyoshi
Oshima Taku
Babcock-Hitachi Kabushiki Kaisha
Ostrager Allen M.
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