Gas Turbine Control

The usual objective of a gas turbine fuel controller is to vary the fuel flow as needed to maintain the desired power turbine speed regardless of load or fuel quality variations. In some applications, that speed set point is held constant, but it is more commonly varied to achieve a cascade control objective. CCC gas turbine control application integrates seamlessly with performance and antisurge control applications to provide integrated control and protection of your entire train. The set point for the fuel control application would then be controlled by the performance control application.

Protection

CCC gas turbine controller has several features to ensure the safety of your machine. The controller has specific limits to protect it from damage and reduce maintenance. Here are the common protection control features:

• Fuel Regulation for controlling a selected shaft speed or the power output while protecting against speed, temperature, and pressure extremes
• Overspeed Protection for the power turbine and gas generator using a combination of closed- and open-loop responses (both high-and low-pressure rotors, if applicable)
• Overtemperature Protection and Pressure Limiting
• Flameout and Overfueling Protection, including scheduled acceleration and deceleration limits
• Surge Protection for the gas generator compressor
• Fallback Strategies that provide continued operation or shut down the turbine when various required inputs fail
• Control Element Tracking to trigger an alarm or shutdown if any control element deviates too far from its intended position
• Set Point Depression function prevents overshoot of the speed target and allows you to reduce thermal stress on the engine

Improved Control

Increasing the efficiency of your gas turbine fuel control allows you to achieve a wider operating envelope. Running closer to the limits, safely, results in more horse power out of the engine. CCC’s gas turbine fuel controller optimizes control with the following features:

• Fully automated sequences for starting up, shutting down, loading, and idling a turbine
• A Dual Fuel feature which divides the total fuel demand between the gas and liquid fuel valves
• Fuel Density Compensation adapts the Fuel Control Valve output signals to variations in fuel density
• Fuel Control Valve Compensation functions adapt the output signals for non-linear control valves