Gas Turbine Control Device for Partial Load Efficiency
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Solution Overview
Problem
Gas turbines face challenges in adjusting performance and responsiveness during partial load operations, leading to difficulties in managing flue gas temperature and optimizing operation efficiency and responsiveness, particularly in environments with varying loads.
Innovation Solution
A control device and method that utilize a rated temperature adjustment line, a preceding setting line, and a limit temperature adjustment line to vary the operation control point of a gas turbine, allowing for temperature adjustment without load reduction, enabling efficient operation even during load variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If temperature adjustment control is executed to maintain rated performance during partial load operations, then operation efficiency is improved, but responsiveness to load variations deteriorates
Solution Approach 1:
The control device dynamically switches between two operation control points: a first control point for rated performance (high efficiency) and a second control point for rapid response (high responsiveness). This dynamic adjustment allows the system to adapt to varying load conditions, maintaining efficiency during stable operation while enabling rapid response when load changes occur.
Solution Approach 2:
The invention changes the operation control parameters (flue gas temperature and load) based on the operational state. By defining different control points with distinct parameter sets and switching between them according to load variation requirements, the system achieves both high efficiency and high responsiveness at different operational phases.
2Device complexity
If the operation control point is fixed for temperature adjustment control, then control simplicity is maintained, but adaptability to varying loads deteriorates
Solution Approach 1:
The control range is segmented into multiple operation control points (first control point for rated performance, second control point for rapid response). Each control point has defined characteristics suitable for specific operational scenarios. The control device selects the appropriate control point based on current load conditions, providing both simplicity and adaptability.
Solution Approach 2:
The control device is designed to handle multiple operational modes universally. By incorporating both the first and second control points with distinct characteristics, a single control device can adapt to various load conditions (stable operation and rapid response scenarios), eliminating the need for multiple specialized control systems.
3Productivity
If flue gas temperature is maintained at rated levels during partial load, then performance is optimized, but the risk of exceeding temperature limits increases
Solution Approach 1:
The control device incorporates feedback mechanisms that monitor flue gas temperature and load conditions. Based on this feedback, the control device determines whether to maintain the first control point (rated performance) or switch to the second control point (rapid response with lower temperature), ensuring temperature limits are not exceeded while optimizing performance when safe.
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 configuration enables the gas turbine to maintain rated performance during partial load operations while allowing for easy adjustment of operation efficiency and responsiveness, enhancing performance and responsiveness in response to load variations.
Implementation Method 1
air that is introduced from an air-intake port is compressed into high-temperature and high-pressure compressed air by a compressor
Implementation Method 2
fuel is supplied to the compressed air and is combusted to obtain a high-temperature and high-pressure combustion gas
Implementation Method 3
The turbine is operated by the combustion gas to drive a power generator that is connected to the turbine
Data Source
AI summary
Provided is a control device of a gas turbine including a compressor, a combustor, and a turbine. The control device executes load control of allowing an operation control point for operation control of a gas turbine to vary in response to a load of the gas turbine. The operation of the gas turbine is controlled on the basis of a rated temperature adjustment line for temperature adjustment control of a flue gas temperature at a predetermined load to a rated flue gas temperature at which performance of the gas turbine becomes rated performance, a preceding setting line for setting of the flue gas temperature at the predetermined load to a preceding flue gas temperature that becomes lower in precedence to the rated flue gas temperature, and a limit temperature adjustment line for temperature adjustment control.