Refurbishment project description

The 263MW hydroelectric generating facility at Edéa (60km from the Douala International Airport), on the Sanaga river was constructed from 1949 to 1975 in three phases. This will be a turnkey contract, and the refurbishment process will consist of the following:

EDEA 1 - Units 1-3

Dismantling and the complete replacement of units 1-3 with the possibility of increasing the unit output. (between 16MW and 23MW)

EDEA 2 – Units 4-9

The replacement of obsolete components, modernisation of the shaft seal system and the possibility of replacing the turbine hub blades.

EDEA 3 - Units 10-14

The complete renovation of the alternators (stator, rotor, exciters) and the replacement of the voltage regulators and speed governors.

Command, control and protection

Replacement of the present system with synchronized relays/desk set control boards for the units/centralised control and command system in the command room/SCADA system in the control room

Heavy electro-mechanical equipment

Rehabilitation of the following heavy electromechanical equipment:

• <>Transformers - replacement of the five transformers of EDEA III.
• Other auxiliary equipment- – fire detection system etc.<>
• Intake gates – seals on the servo mechanism.<>
• Spill way gates – replacement of seals to prevent leakages.<>
• Trashrack. <>
• Grills.<>
• Stop logs (coffer dams).<>
• <>Lifting cranes – coupling and braking mechanism.

• Experience of successfully completing the turnkey construction of no less than five hydro power plants, each of which is no less than 20MW, within the past five years.
• Experience of no less than five years in hydro power plant equipment refurbishment.
• Proven experience in design, manufacture, erection, commissioning, and testing of no less than three hydro turbo alternators.
• Confirmed willingness to offer guarantees for programme, output and efficiency and agreement to accept liquidated damages for failure to meet these guarantees.
• Accreditation to ISO 90001 or equivalent norms, submitted in pdf format.
• Audited financial statements for the last three years, submitted in pdf format. The annual turnover acceptable is no less than €45M (US$54M).

• Visit http://www.poweradvocate.com.
• Click on the ‘REGISTER’ button on the right-hand of the screen.
• Complete the registration sheet with the requested information (important: please indicate ‘EDEA refurbishment’ in the referral field).
• After registering, AES SONEL will confirm your involvement and you will receive an email informing that your registration is complete and that you have access to the platform.
• Return to http://www.poweradvocate.com, logon and download further information on this pre-qualification.