Title:
CONTROL OF START OF STEAM TURBINE
Document Type and Number:
Japanese Patent JPS6469703
Kind Code:
A
Abstract:
PURPOSE:To reduce erosion by calculating the water quantity inside a turbine stage part on starting a turbine which generates large water droplets and controlling the number of revolution of the turbine at most to the value where erosion is not generated, on the basis of the water quantity. CONSTITUTION:The steam temperature inside a turbine stage part and the wall surface temperature are detected and the temperature difference between the both temperatures is calculated by a calculator 13. The water quantity (drain quantity) per hour is calculated by a water quantity calculator 15 from the output signal which represents the temperature difference and the output signal of an inflow steam quantity calculator 14. Then, a judging device 16 judges if the obtained water quantity is put into reduction tendency, passing through a peak value or not, and then a judging device 17 judges if the water quantity becomes 1/3 of the peak value or not. If the water quantity on start is over 1/3 of the peak value. the number of revolution is kept, and when the water quantity becomes 1/3 or less, a revolution speed adjustor 18 executes the speed increasing control.
Inventors:
TAKI TOMOYUKI
YASUGADAIRA NORIO
SATO TAKESHI
YASUGADAIRA NORIO
SATO TAKESHI
Application Number:
JP22393987A
Publication Date:
March 15, 1989
Filing Date:
September 09, 1987
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01D19/00; (IPC1-7): F01D19/00
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)
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