US 12,031,491 B2
Combustion adjustment method and combustion control device of gas turbine
Yutaro Fujioka, Yokohama (JP); Tsukasa Ito, Yokohama (JP); Fumikatsu Inoue, Yokohama (JP); Ryoichi Haga, Yokohama (JP); and Takahiro Ito, Kobe (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 18/032,937
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
PCT Filed Oct. 20, 2021, PCT No. PCT/JP2021/038719
§ 371(c)(1), (2) Date Apr. 20, 2023,
PCT Pub. No. WO2022/091899, PCT Pub. Date May 5, 2022.
Claims priority of application No. 2020-180324 (JP), filed on Oct. 28, 2020.
Prior Publication US 2023/0392789 A1, Dec. 7, 2023
Int. Cl. F02C 9/28 (2006.01); F02C 9/26 (2006.01); F02C 9/32 (2006.01); F02C 9/54 (2006.01)
CPC F02C 9/28 (2013.01) [F02C 9/263 (2013.01); F02C 9/32 (2013.01); F02C 9/54 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A combustion adjustment method of a gas turbine, which is applied to combustion control of a combustor, the method comprising:
a step of selecting a combustion parameter for setting a fuel-air ratio with respect to a load of the gas turbine;
a step of executing a first step that includes a first increase command step, which is an increase command step of increasing a command value of the combustion parameter, or a first decrease command step, which is a decrease command step of decreasing the command value, from a position of an origin;
a step of ending the first step and returning the command value of the combustion parameter to the position of the origin, when the command value reaches a target tolerance upper limit value or a target tolerance lower limit value without occurrence of combustion oscillation in the combustor;
a step of executing a second step that includes a second decrease command step, which is a decrease command step of decreasing the command value in a direction opposite to that in that in the first step from the position of the origin, or a second increase command step, which is an increase command step of increasing the command value; and
a step of ending the second step and returning the command value of the combustion parameter in the second step to the position of the origin, when the command value in the second step reaches the target tolerance lower limit value or the target tolerance upper limit value without occurrence of combustion oscillation in the combustor,
wherein the method further comprises a combustion tolerance confirmation step of confirming a combustion tolerance range of the combustion parameter.