Turbo-generator upgrade
CANTIERI NAVALI RIUNITI 4MW turbo-alternators (GTA) to supply the plant with electricity.
Regulation in place before intervention
The current GTA control system uses various modules:
- Woodward UG8D mechanical controller
- 3-way hydraulic pilot
- A hydraulic cylinder
Description of operation:
The setpoint from the control room (+/- fast) is transformed by a stepper motor which drives the mechanical setpoint of the regulator.
The mechanical regulator is a directional valve and therefore modulates the hydraulic pressure of the cylinder.
The hydraulic power cylinder uses a lever system to actuate the turbine’s regulating valves.
NCG intervention
Desired control :
The GTA control system must :
- Replacement of the UG8D mechanical controller by an electromechanical system
- Retain the 3-way hydraulic pilot
- Retain the hydraulic cylinder
- Make speed regulation reliable (permanent island operation)
Description of operation:
- The digital speed regulator is controlled by +/- fast contacts which modify its speed setpoint.
- The controller then acts on an actuator via a current signal (20-160 mA).
- The actuator moves a directional valve, thus modulating the cylinder’s hydraulic pressure.
- The hydraulic power cylinder uses a lever system to operate the turbine’s regulating valves.
Equipment used: Woodward 505 controllers and Woodward UG-Actuator actuators
Why do call onNormandy 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.
