Tarbela 4th Extension: WAPDA completes load rejection test of all units

Turbine efficiency test was also carried out last week under the supervision of an international expert


Our Correspondent November 25, 2018
Turbine efficiency test was also carried out last week under the supervision of an international expert. PHOTO: FILE

LAHORE: The Water and Power Development Authority (Wapda) successfully carried out simultaneous load rejection test of all three units of Tarbela 4th Extension Hydropower Project.

The test was conducted at a load of about 1,100MW. The simultaneous load rejection test was aimed at testing the stability of under-water parts and rise in speed and pressure of the turbines. The test is required to be carried out once a hydropower project is complete and all of its generating units are fully operational.

Turbine efficiency test was also carried out last week under the supervision of an international expert. The test ascertained that the turbine efficiency was more than it was envisaged during the model testing.

WAPDA to endure higher cost for ‘favouritism’

The completion of Tarbela 4th Extension and Neelum-Jhelum hydropower projects this year has exerted positive impact on overall hydel generation, as it surged to 5,241MW during the peak hours on Friday registering an increase of about 46% compared with 3,581MW generated on the same day last year.

Since its commissioning, Tarbela 4th Extension Hydropower Project has so far contributed 1.26 billion units of low-cost hydel electricity to the national grid despite low water flow this year. 

Published in The Express Tribune, November 25th, 2018.

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