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Method for controlling a gas turbine operation with seleceted turbine outlet temperature measurements

A technology of gas turbine and outlet temperature, which is applied in the direction of fuel control of turbine/propulsion device, engine control, turbine/propulsion fuel delivery system, etc. Accurately estimate problems such as burner hot gas temperature, to achieve the effect of increasing the possibility of drift

Active Publication Date: 2017-09-26
ANSALDO ENERGIA IP UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the fuel supply to the combustor is completely stopped, for example at low loads, the hot gas temperature can change significantly and the turbine outlet temperature distribution is not uniform
As a result, the average turbine exit temperature cannot be used to estimate the hot gas temperature of an operating combustor with sufficient accuracy

Method used

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  • Method for controlling a gas turbine operation with seleceted turbine outlet temperature measurements
  • Method for controlling a gas turbine operation with seleceted turbine outlet temperature measurements
  • Method for controlling a gas turbine operation with seleceted turbine outlet temperature measurements

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Embodiment Construction

[0062] The control scheme for a sequential combustion gas turbine (known as, for example, the GT24 or GT26) is in figure 1 shown in . The gas turbine 10 includes a rotor 11 surrounded by a concentric casing. A compressor 12 compresses air passing through a plenum into a first combustion chamber 13 with burners. Fuel is supplied via a first combustor fuel supply 22 . The resulting hot gases leaving the first combustion chamber 13 drive a first turbine 14 . Downstream of the first turbine 14, combustion is injected into the exhaust gases of the first turbine 14 via fuel injectors 15, which still contain sufficient oxygen for further combustion. Fuel is combusted in the second combustion chamber 16 . The reheated gas drives the second turbine 17 and ultimately exits the gas turbine 10 . The first turbine outlet temperature measuring device 18 can also be integrated in or attached to the fuel spray gun 15 .

[0063] The first turbine 14 is also referred to as a high-pressure...

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PUM

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Abstract

The present disclosure refers to a method for operating a gas turbine (10) comprising a compressor (12), a combustor (13, 16), a turbine (14, 17) downstream of the combustor (13, 16), and a total number of turbine outlet temperature measurements (18, 19). The method comprising the steps of: supplying a first fuel flow to one of the burners (24,25) of one combustor (13, 16), which is smaller than a second fuel flow to another one of the burners (24, 25) the same combustor (13, 16), selecting a number of turbine outlet temperature measurements (18, 19) which is smaller than a total number of the turbine outlet temperature measurements (18, 19), averaging the measured temperatures of the selected turbine outlet temperature measurements (18, 19) to obtain an trimmed turbine outlet temperature (TAT TR) which is used for controlling the operation of the gas turbine (10).

Description

technical field [0001] The present invention relates to a method of operating a gas turbine using selected turbine outlet temperature measurements. The invention additionally relates to a gas turbine with a controller configured and adapted to carry out such a method. Background technique [0002] Turbine outlet temperature is one parameter that can be used to control the operation of the gas turbine and to protect the gas turbine during operation. An example of using the turbine outlet temperature to control a gas turbine has been disclosed eg in EP2071157A1. [0003] The turbine exit temperature can also be used for sequential combustion gas turbines. Control of sequentially fired gas turbines has been the subject of various literature in the past. The basic operating concept of a sequential combustion gas turbine is described, for example, in EP0718470A2. [0004] Reliable and precise measurement of the turbine outlet temperature is a prerequisite for reliable and pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C9/28
CPCF02C9/28F02C7/228F05D2270/08F05D2270/112F05D2270/303F05D2270/80F05D2270/803
Inventor 张孟斌D·特尔空S·比尔尼罗M·伽斯那V·洛納
Owner ANSALDO ENERGIA IP UK LTD