Gas Turbine Burner Pressure Fluctuation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gas turbine burners face challenges in maintaining stable operation due to varying ambient conditions and fuel properties, leading to pressure fluctuations in the combustion chamber, which can be difficult to detect and control.
Innovation Solution
A burner system equipped with a control unit, pressure sensors, and fuel stages that perform Fourier transformations on pressure sequences to identify frequency band maxima, allowing for comparison with predefined thresholds to adjust mass flows and control pressure fluctuations, thereby ensuring optimal operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional burners are designed for specific operating conditions, then emissions and operational availability are within planned range, but the burners cannot handle varying ambient conditions and fuel properties, leading to pressure fluctuations
Solution Approach 1:
The burner system transitions from static design parameters to dynamic control by continuously monitoring pressure sequences and adjusting mass flows in real-time based on actual operating conditions, enabling the system to adapt to varying ambient conditions and fuel properties while maintaining reliable operation
Solution Approach 2:
The system changes operational parameters (mass flows of fuel stages) based on detected pressure sequence characteristics and Fourier transformation results, allowing the burner to maintain stability across varying operating conditions by dynamically adjusting parameters rather than relying on fixed design values
2Difficulty of detecting and measuring
If pressure sensors measure pressure sequences to detect fluctuations, then pressure fluctuations can be identified, but superfluous control actions occur when maxima above threshold don't reflect real combustion conditions
Solution Approach 1:
The system implements feedback control by continuously monitoring pressure sequences, performing Fourier transformations, comparing maxima to thresholds, and adjusting mass flows accordingly. This closed-loop feedback mechanism ensures that control actions are taken only when genuine combustion issues are detected, reducing superfluous adjustments while maintaining accurate detection of real pressure fluctuation problems
Solution Approach 2:
The system performs preliminary analysis through Fourier transformation of pressure sequences before initiating control actions. By pre-processing the pressure data and identifying genuine combustion anomalies through frequency domain analysis, the system avoids reacting to false signals and ensures control actions are based on verified combustion conditions
Data Source
AI summary
A burner with a control unit, a combustion chamber, a pressure sensor and fuel stages which are arranged to supply fuel with a respective mass flow to the combustion chamber, wherein the mass flows are controlled by the control unit, wherein the pressure sensor is adapted to measure a pressure sequence in the combustion chamber or in the burner and to transfer the pressure sequence to the control unit which is adapted to perform a Fourier transformation on at least one determined timespan of the pressure sequence to result in a pressure spectrum having a maximum within a frequency band and wherein the control unit is adapted to perform a comparison of the maximum with a predefined threshold and to control the mass flows by using the comparison to reduce and/or to control pressure fluctuations in the combustion chamber.