Proposed Project for USAID - Wapda

REPAIR & MAINTENANCE OF TARBELA POWER
STATION
Tarbela Dam is one of the world’s largest earth and rock filled dam. It is one of the world
greatest resources development projects built on one of the world’s largest river Indus called
Abbasin or Father of Rivers. Tarbela Power Station is located on the right bank of river Indus.
Power Station is equipped with fourteen generating units having total capacity of 3478 MW. It
is the biggest hydel power station completed in four phases since 1977 to 1993-93.
The total power potential of the station is 3478 MW with 14 generating units constitutes about
25~35% of the total power presently generated in the country.
The existing equipment of Tarbela Power Station are in service since commissioning and
reliability of most of the equipment have considerably been reduced and the station
desperately require planned repair and maintenance programme.
The planned repair and maintenance programme will enhance reliability and will ensure
smooth operation of the station by minimizing prolonged and forced outages in one way or the
other. The sever power crises in the prevailing situation have created energy crises and
ultimately lead to public unrest and put the country economic stability at stake due to
prolonged interruption.
The procurement of spares/equipment demanded under additional requirement will enhance
the reliability of the station in the following manner :
• Help to improve the reliability factor of the plant.
• To minimize forced outages.
• Help to reduce the energy crises.
• To improve the availability of units.
• Will enhance the life of units.
The close analysis shows that the proposed R&M programme of Tarbela Power Station will
earn WAPDA 1973 Million KWH per month or Rs.19730 Million/US$ 232 Million per month.
� If power transformer of Units 1~10 goes out of order due to some fault, the relevant unit
will also remain out till the availability of the transformer. The authority in shape of
revenue will suffer 0.412 Million US$ per day and the station utilization factor will also
go down by 5% at least.
Similarly, if power transformer of any unit from Units 11~14 goes out or order due to
fault then the authority will suffer by a loss of 0.819 Million US$ per day till the
availability of new power transformer.
� If 220KV breaker of unit is develops fault, the relevant unit will remain out till the
availability of breaker. The station and authority will suffer 0.412 Million US$ per day till
the availability of the breaker. Also utilization factor of the station will reduce by 5% at
least. Similarly if breaker of 220KV transmission line develops fault, the station and
authority will suffer a revenue loss of 0.37 Million US$ per day till the availability of the
breaker.
� If stator core of a unit is damaged, then the authority will duffer a revenue loss of 0.412
Million US$ per day till the availability and erection of the new stator.
� If 2 Nos. 30 ton bridge cranes for lifting the rotor of Units 1~10 goes out of order, then
no alternate arrangement is available for lifting the rotor and the unit will remain out till
37