Turbo-pump modernization
Creusot turbo feed pumps (TPA) to supply water to the main turbine boiler, Woodward PG-PL type mechanical speed control with air control.
Regulation in place before intervention
The current TPA control system uses various modules:
- Woodward PGPL mechanical controller
- 3-way hydraulic pilot
- A hydraulic cylinder
Description of operation:
- The setpoint from the control room (4-20 mA) is converted by an I / P (Intensity / Pressure) converter.
- This air drives the PG-PL mechanical regulator.
- The mechanical regulator moves a directional control valve which modulates the cylinder’s hydraulic pressure.
- The hydraulic power cylinder operates the turbine’s regulating valves via a delevier system.
NCGintervention
Desired regulation :
- The operation of the TPA control system must be identical to the existing system:
- Replacement of the PGPL mechanical controller by an all-electric system
- Retention of the 3-way hydraulic pilot
- Retention of the hydraulic cylinder
- Remove the I/P converter
- Create a new speed sensor support to secure the machine
Description of operation:
- The setpoint from the control room (4-20 mA) is transmitted directly to an electronic control board.
- This current command drives the speed setpoint on the control board, which then controls the all-electric actuator.
- The all-electric actuator moves a directional control valve which modulates the cylinder’s hydraulic pressure. The hydraulic power cylinder uses a lever system to operate the turbine’s regulating valves.
Why do call on Normandy Control Group/ NCG
When you choose Normandy Control Group, you choose a partner you can trust for the maintenance and repair of your industrial equipment. As an official Woodward and Parker Meggitt (vibro-meter) distributor in France and French-speaking Africa, including Algeria, Tunisia and Morocco, we offer recognized expertise in the field. We also have two workshops in France, in Le Havre and Marseille, as well as Woodward workshops in Côte d’Ivoire and Senegal.
