Steam turbines and gas turbines are used for driving compressors and other machinery, e.g. generators and pumps.
Turbine speed control is the primary control loop associated with a turbine. Actual speed is sensed using a speed pickup. The speed controller – also referred to as “governor” – determines the deviation relative to the process setpoint; the controller outputs a signal to drive the actuator of the steam inlet valve or fuel control valve, thus increasing or decreasing steam/fuel input to the turbine. Traditionally, dedicated controllers have been used as speed governors; nowadays, the speed control loop can be easily integrated into a PLC, thus allowing for a more homogeneous system architecture.
AviComp has well-proven, advanced control algorithms for turbine speed control. Furthermore, AviComp has extensive experience in the integration of all relevant dedicated controllers for speed control.
Turbine overspeed protection: Turbines may be equipped with an electronic overspeed detection system. Actual speed is sensed using a set of speed pickups – most commonly in a two-out-of-three arrangement; a relay output closes the trip valve. AviComp has extensive experience in the integration of all relevant dedicated controllers for overspeed detection.
AviComp is also experienced in the engineering and production of customized units, e.g. dedicated PLC for the turbine, backup PLC, or hardwired relay backup systems for critical turbine loops.
In most cases, one machinery-monitoring system is provided for the entire train: turbine and driven machine.
Over the past 15 years, AviComp has successfully engineered, supplied, and commissioned 1,200 rotating-machinery control systems all over the world. Our customers worldwide, which include machinery manufacturers and end-users, as well as EPC contractors, trust in AviComp’s unique capabilities.