US 12,188,411 B2
State determining device, operation controlling device, gas turbine, and state determining method
Takashi Sonoda, Tokyo (JP); Ryuji Takenaka, Kanagawa (JP); and Sosuke Nakamura, Kanagawa (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by Mitsubishi Power, Ltd., Kanagawa (JP)
Filed on Jun. 22, 2021, as Appl. No. 17/354,141.
Application 17/354,141 is a continuation of application No. 15/545,872, abandoned, previously published as PCT/JP2015/083455, filed on Nov. 27, 2015.
Claims priority of application No. 2015-019674 (JP), filed on Feb. 3, 2015.
Prior Publication US 2021/0310409 A1, Oct. 7, 2021
Int. Cl. F02C 7/05 (2006.01); F01D 15/10 (2006.01); F01D 21/00 (2006.01); F02C 7/057 (2006.01); F02C 9/00 (2006.01); F02C 9/26 (2006.01); F02C 9/28 (2006.01); F01D 25/36 (2006.01)
CPC F02C 7/057 (2013.01) [F01D 15/10 (2013.01); F01D 21/003 (2013.01); F02C 9/00 (2013.01); F02C 9/263 (2013.01); F02C 9/28 (2013.01); F01D 25/36 (2013.01); F05D 2270/05 (2013.01); F05D 2270/061 (2013.01); F05D 2270/303 (2013.01); F05D 2270/306 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A controlling device comprising:
a state determining device that determines a state of a gas turbine connected to an electric generator, the gas turbine comprising a compressor that compresses intake air into compression air, a fuel supply device that supplies fuel, a combustor that mixes the compression air supplied from the compressor and the fuel supplied from the fuel supply device and combusts a resultant mixture to generate combustion gas, and a turbine that is rotated with the generated combustion gas,
the state determining device including:
a hardware processor configured to
detect a change rate of a fuel-flow instruction value of fuel to be supplied from the fuel supply device to the combustor,
detect a change rate of an output of the electric generator, and
determine whether the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator are proportional to each other based on the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator;
wherein the controlling device is configured to control the gas turbine based on the fuel-flow instruction value and the output of the electric generator, and
wherein the controlling device includes a turbine-inlet-temperature calculating unit configured to calculate an estimation value of a turbine inlet temperature based on a value of the output of the electric generator,
the controlling device changes a value of a detected output of the electric generator to a value with smaller fluctuation when the state determining device has determined that an operation of the gas turbine departs from a predetermined relation, and
the turbine-inlet-temperature calculating unit calculates the estimation value of the turbine inlet temperature based on the changed value with a smaller fluctuation.