Introduction of components of gas turbine components

A typical gas turbine consists of several key components, including the generator, compressor, turbine, combustion chamber, and regenerator. Each plays a vital role in the overall operation and efficiency of the system. The integration of these parts requires precise control, especially during the start-up and operational phases.

During the initial start-up phase, the turbine is driven by a soft starter unit, which gradually accelerates the rotor. Once the ignition speed is reached, the controller activates the ignition nozzle, fuel shut-off valve, and regulating valve to initiate the combustion process. This step is crucial, as it marks the transition from mechanical to thermal energy generation.

After successful ignition, the turbine begins to generate power, and the generator is also engaged, allowing the gas turbine to continue accelerating. This phase is often referred to as "double-dragging." The control system continuously monitors the generator's starting current and automatically disconnects the motor drive circuit when the current drops to a safe level. At this point, the turbine operates independently at idle speed, and the start-up sequence is complete.

To enhance the thermal efficiency of the gas turbine across different power levels, a variable-speed and variable-power control strategy is commonly employed. This approach enables the control system to dynamically adjust the turbine's speed based on load changes, optimizing its performance and ensuring efficient operation under varying conditions. Such adaptive control not only improves efficiency but also enhances the system's responsiveness and stability over time.