Rehabilitation of Tarbela Hydropower Plant

This replacement added 10MW capacity to the Tarbela power station, bringing the total capacity gain to 128MW with the installation of new Class F insulation windings at units 1, 3, and 4. Implementation of the rehabilitation project focused on several key interventions, including the replacement of damaged generator stator windings with Class F insulation windings, upgrading of the SCADA system, and replacement of electromechanical governors with digital ones. Spare seals and guides for relief and bypass valves on turbine side at units 1-10 were also installed, with 100% of the allocated amount disbursed to WAPDA. Procurement of digital governors and SCADA system is currently underway. The project schedule indicates that the replacement of damaged generator stator windings with Class F insulation windings at unit 4 was completed, with 100% of the allocated amount reimbursed. At unit 3, the installation of winding was completed on May 25, 2012, with 90% of the allocated amount less spares amount reimbursed. WAPDA will submit the invoice for the remaining 10% amount in the first week of June. The rehabilitation project also included the upgrading of the SCADA system, with a new system under manufacturing by ABB and expected shipment in October 2012. Spare seals and guides for relief and bypass valves on turbine side at units 1-10 were installed, with 100% of the allocated amount disbursed to WAPDA. Replacement of worn-out station drainage and dewatering pumps at units 1-10 is in progress, with new pumps received at Tarbela. As of May 2012, the total disbursement for the Tarbela rehabilitation project was $10,879,917 out of the committed $16.5 million assistance amount. Amendment-I of the Tarbela FARA revised the completion date to December 31, 2012.