Gas Turbine Maximum Output Correction via IGV and Intake Temperature

Solution Overview

Problem

Changing the setting of the intake air guide vane (IGV) maximum opening degree in gas turbines can lead to control failures, resulting in decreased output and lifespan due to temperature deviations of combustion gas beyond acceptable limits.

Innovation Solution

A method that includes a temperature reception unit, a change reception unit, a basic maximum output computation unit, a coefficient creation unit, and a maximum output correction unit to adjust the gas turbine's output based on the IGV opening degree changes and intake air temperature, using correction coefficients to maintain optimal operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the setting of the IGV maximum opening degree is changed, then the gas turbine can adapt to different installation conditions and seasonal variations, but the combustion gas temperature may deviate from the upper limit value causing control failure

Engineering Contradiction:

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent changes the maximum output parameter based on the IGV maximum opening degree setting. When the IGV maximum opening degree is modified, the system calculates a corrected maximum output using a correction coefficient, ensuring that combustion gas temperature remains within acceptable limits while adapting to different installation conditions and seasonal variations.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system incorporates feedback by detecting the IGV maximum opening degree setting and using this information to adjust the maximum output parameter. This closed-loop approach ensures that any change in IGV setting is compensated by appropriate adjustments to the maximum output, preventing control failure and maintaining reliable operation.

Inventive Principle:

Principle #23Feedback

2Productivity

If the IGV maximum opening degree is increased to boost output, then the gas turbine output increases, but the combustion gas temperature may exceed the upper limit value

Engineering Contradiction:

Core Design Contradiction:

ProductivityVSTemperature

Solution Approach 1:

The patent dynamically adjusts the maximum output parameter in response to changes in IGV maximum opening degree. By calculating a correction coefficient based on the IGV setting, the system can increase output when appropriate while simultaneously preventing combustion gas temperature from exceeding the upper limit value, thus resolving the trade-off between productivity and temperature control.

Inventive Principle:

Principle #35Parameter changes

3Temperature

If the IGV maximum opening degree is decreased to lower combustion gas temperature, then temperature control is improved, but the gas turbine output decreases

Engineering Contradiction:

Core Design Contradiction:

TemperatureVSProductivity

Solution Approach 1:

The system uses parameter change by adjusting the maximum output parameter based on the IGV maximum opening degree setting. When the IGV setting is reduced to control combustion gas temperature, the system appropriately lowers the maximum output parameter to match, preventing both temperature exceedance and unnecessary output loss. This ensures optimal balance between temperature control and productivity.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method effectively suppresses control failures and maintains output by accurately adjusting the gas turbine's maximum output in response to IGV setting changes and temperature variations, preventing lifespan and output degradation.

Implementation Method 1

a compressor that compresses air to generate compressed air

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 2

a combustor that combusts fuel in the compressed air to generate combustion gas

Methodology Applied

Scientific EffectCombustion: Combustion

Implementation Method 3

a turbine to be driven by the combustion gas

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS12152541B2Method for creating maximum output in gas turbine, method for creating output for controlling gas turbine, method for controlling gas turbine, device for executing said methods, and program for causing computer to execute said methods

Publication Date: 2024.11.26

AI summary

A maximum output creator is provided with: a temperature reception unit that receives an intake temperature, which is the temperature of air taken in by a compressor of a gas turbine; a change reception unit that receives the details of a change to a maximum opening degree in an intake quantity adjuster of the compressor; a basic maximum output computation unit that determines a basic maximum output of the gas turbine on the basis of the intake temperature received by the temperature reception unit; a coefficient creation unit that creates a maximum output correction coefficient for correcting the basic maximum output on the basis of the details of the change to the maximum opening degree received by the change reception unit and the intake temperature received by the temperature reception unit; and a maximum output correction unit that corrects the basic maximum output using the maximum output correction coefficient.