Gas Turbine Engine Control for Transportation Delay Compensation
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Solution Overview
Problem
In gas engine systems, a delay exists between adjusting a gas or air supply mechanism and the corresponding change in gas flow received at the combustion system, leading to inefficiencies and errors in the gas/air supply system.
Innovation Solution
A gas engine assembly with a bypass line and an engine control assembly that calculates and compensates for transportation delays using sensors and a non-linear algorithm to generate feed-forward compensation signals, adjusting gas supply control mechanisms to achieve desired gas characteristics at the intake manifold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a gas supply control mechanism is adjusted to change gas flow, then the desired gas characteristic is received at the combustion system, but a delay exists between the adjustment time and the corresponding change in gas flow
Solution Approach 1:
The system performs preliminary action by calculating the transportation delay and computing compensatory control signals in advance. The controller determines the delay between valve adjustment and actual gas flow change, then pre-adjusts the control signal to compensate for this delay, ensuring the desired gas characteristic is achieved at the combustion system without temporal lag.
2Ease of operation
If a bypass line is added to the gas supply system, then non-linear response in gas flow is addressed, but the device complexity increases
Solution Approach 1:
The bypass line acts as an intermediary element in the gas supply system. It provides an alternative flow path that allows the system to compensate for non-linear responses in the main gas supply line. By introducing this intermediate pathway, the controller can adjust gas flow more precisely and achieve more linear response characteristics, despite the increased structural complexity.
Data Source
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AI summary
A gas engine assembly 100 includes a compressor 121, a combustion system 130, a bypass line 153 and a control system 140. The control system 140 is configured to control gas supply parameters based on a transportation delay value. The transportation delay value corresponds to a delay between a time when a gas supply control mechanism is adjusted and a time that gas having a corresponding adjustment of a gas characteristic is received at a predetermined point downstream from the gas supply control mechanism.