Gas Turbine Testing via Variable Load Simulation
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Solution Overview
Problem
Testing rotary machines, such as gas turbines, under real network conditions is challenging due to the need for precise conditions, high resource requirements, and potential disruptions to electricity supply, making it difficult to assess their dynamic response and frequency regulation capabilities effectively.
Innovation Solution
A system and method that utilize a variable load coupled to the rotary machine's shaft, controlled by a controller to simulate load changes, allowing for closed-loop regulation and measurement of response times, enabling the rotary machine to stabilize at different load conditions without affecting the electrical network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If testing is performed on actual electrical network, then measurement precision of dynamic response is improved, but reliability of electricity supply deteriorates due to potential disruptions
Solution Approach 1:
The patent introduces a test bench as an intermediary device that couples to the rotary machine through a shaft. This test bench simulates network conditions and load variations without requiring actual connection to the electrical network, thereby maintaining supply reliability while enabling precise measurement of dynamic response characteristics.
Solution Approach 2:
The patent creates a simplified copy of the electrical network environment using a test bench that reproduces key operational conditions including load variations and frequency changes. This copy allows accurate assessment of rotary machine performance without the risks associated with actual network testing.
2Measurement precision
If testing is performed on actual electrical network, then assessment of frequency regulation capability is improved, but resource requirements increase due to need for precise conditions and network coordination
Solution Approach 1:
The patent extracts the essential testing function from the complex electrical network environment and concentrates it in a dedicated test bench. This extraction eliminates the need for network coordination, precise scheduling, and other resource-intensive requirements while maintaining the ability to assess frequency regulation capability.
Solution Approach 2:
The test bench is designed as a universal testing platform that can simulate multiple network conditions and operational scenarios. This multi-functionality allows comprehensive assessment of rotary machine performance across various conditions without requiring separate testing arrangements for each scenario.
3Ease of operation
If variable load is coupled to rotary machine shaft, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent merges the variable load, control system, and measurement instruments into an integrated test bench assembly. This combination simplifies operation by providing a unified interface for controlling load variations and measuring responses, while the internal complexity is contained within the modular test bench structure.
Data Source
AI summary
A method of testing a gas turbine is provided. The gas turbine includes a first compressor and an expansion turbine coupled by a drive shaft. The method includes operating the gas turbine and a second compressor at a first steady load and a first steady drive shaft speed. The second compressor is rigidly coupled to the drive shaft. The method also includes changing a load of the second compressor by a known amount, and measuring a time required for the gas turbine to stabilize at a second steady load and a second steady drive shaft speed in response to the changed load of the second compressor.