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Method for controlling operation of a gas turbine with sequential combustion

A gas turbine, turbine technology, applied in gas turbine installations, engine control, turbine/propulsion fuel delivery systems, etc., which can solve problems such as troublesome solutions, affecting component life, and unsatisfactory machine operators.

Active Publication Date: 2020-03-03
ANSALDO ENERGIA IP UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution is cumbersome, unsatisfactory for machine operators, and affects component life

Method used

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  • Method for controlling operation of a gas turbine with sequential combustion

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Embodiment Construction

[0053] The present invention relates to Active TAT1 Control (ATC), a semi-automatic control logic suitable for improving the closed-loop control of the first (EV) burner of a gas turbine with sequential combustion, such as the already mentioned GT26. The ultimate goal is to prevent NOx emissions from reaching guaranteed limits.

[0054] This is achieved by using the average turbine outlet temperature (ie TAT1 AVG ) of the (first) high pressure turbine 14 as the process control temperature. Linear regression analysis of the actual GT26 turbine showed that the average of the hottest 8 out of the actual 24 TAT1 measurements could indicate a mismatch between measured NOx emissions and the controlled TAT1 AVG at base load.

[0055] According to an embodiment of the invention, the hottest 8 TAT1 measurements averaged over 20 minutes are used as an indicator to correct for first (EV) burner closed-loop control disturbances (as e.g. EV hot gas temperature deviations), and thus Keep N...

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Abstract

The invention relates to a method for controlling the operation of a gas turbine (10) with sequential combustion, the gas turbine (10) comprising a compressor (12) with variable inlet guide vanes (VIGV), a first combustor (13 ), the high pressure turbine (14) downstream of the first combustor (13), the second combustor (16) downstream of the high pressure turbine (14), and the downstream of the second combustor (16) low pressure turbine (17). Exceeding the target NOx emission limit and increasing component stress are prevented by adjusting the average TAT1 temperature (TAT1 AVG) if at least one local TAT1 measurement increases during base load operation beyond a predetermined threshold.

Description

technical field [0001] The present invention relates to the technology of gas turbines. The invention relates to a method for controlling the operation of a gas turbine with sequential combustion. Background technique [0002] Controlling gas turbines with sequential combustion has been the goal of various previous literatures. [0003] For example, document US 8,434,312 teaches a method for low CO emission part-load operation of a gas turbine with sequential combustion, wherein the burner air ratio (λ) of the operating burner of the second burner is kept below The maximum air ratio (λmax). In order to reduce the maximum air ratio (λ), a series of modifications are made to the operating concept of the gas turbine, individually or in combination. One modification is to open the bank of variable compressor inlet guide vanes (VIGVs) before engaging the second combustor. To engage the second combustor, the integrated variable compressor inlet guide vanes are quickly closed a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C9/28
CPCF02C9/28F05D2270/112F05D2270/082F05D2270/303F05D2250/52F02C6/003F02C9/54F05D2270/309F01D21/003F02C3/14F02C7/042F02C7/057F02C9/22F05D2220/32F05D2240/35
Inventor A.J.舍斯伊P.希伊斯塞P.斯伊维特T.雷德克R.德希塔
Owner ANSALDO ENERGIA IP UK LTD