Gas Turbine Plant Control Method for Dynamic Reference Adjustment
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Solution Overview
Problem
Existing control devices for gas turbine plants prioritize maximum power delivery and reliability during peak demand, leading to performance degradation and reduced efficiency during stationary operations, as they set overly restrictive reference values to prevent system damage.
Innovation Solution
A control method and device that adjusts reference values for a gas turbine plant by using a data detection unit and control unit to dynamically adjust inlet guide vanes, pilot flow rates, and electrical power gradients, allowing for increased flexibility and efficiency by recalculating reference values during transient power demands and restoring them during stationary operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference values of controlled variables are strongly limited to ensure plant reliability during power increase transitions, then plant reliability is improved, but system efficiency deteriorates during stationary operation
Solution Approach 1:
The control device dynamically adjusts reference values based on real-time detection of power demand transitions. During stationary operation, reference values are set to optimal efficiency levels, while during detected transitions to power increase, they are adjusted to ensure reliability. This dynamic adaptation eliminates the need for permanently restrictive reference values, resolving the contradiction between reliability and efficiency.
Solution Approach 2:
The invention changes the parameters (reference values of controlled variables) based on operational conditions. By detecting transitions and adjusting reference values accordingly, the system maintains reliability during critical transitions while optimizing efficiency during stationary operation, rather than using fixed restrictive parameters throughout all operating conditions.
2Power
If control devices are configured to ensure maximum power delivery at all times, then power delivery capability is improved, but plant efficiency deteriorates during stationary operation
Solution Approach 1:
The control device transitions from static maximum power delivery configuration to dynamic adjustment based on detected power demand transitions. During stationary operation, the system operates at optimal efficiency points, while during detected transitions, it dynamically adjusts to prioritize power delivery capability, thus resolving the contradiction between continuous maximum power capability and operational efficiency.
3Reliability
If restrictive reference values are used to prevent system damage during transitions, then system protection is improved, but operational flexibility deteriorates
Solution Approach 1:
The control device implements dynamic reference value adjustment that provides restrictive protection only during detected transitions to power increase, while maintaining operational flexibility during stationary periods. This temporal differentiation allows the system to be both protected when needed and flexible when safe, resolving the contradiction between system protection and operational flexibility.
Data Source
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AI summary
Control method and device for controlling a gas turbine plant (1) provided with at least a gas turbine (5), a combustion chamber (4) and a compressor (3); the method comprising the steps of: - setting a plurality of reference values for respective operative parameters of the plant (1); - detecting an activation condition; - activating the correction of one or more reference values if the activation condition is detected; wherein the step of detecting the activation condition comprises: - detecting a first value (IGVPOS(t1)) of a parameter indicative of the electrical power greater than a first threshold value in a first instant (t1); - detecting a second value (IGVPOS(t2)) of the parameter indicative of the electrical power lower than a second threshold value in a second instant (t2) comprised in a time window which precedes the first instant (t1).