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Guddu Thermal Power Station.

Two things happened in the beginning of this century's second half, within ten years of each other: vast reservoirs of natural gas were discovered at Sui (Balochistan) in 1953 to pave the way for development of a gigantic power system in the years to come, and Guddu Barrage was constructed across the river Indus by WAPDA in 1963. Although no direct connection between the two events is apparent they together, in later years, transformed the unknown, minor village of Guddu, located about 10 km from Kashmore in the district of Jacobabad, 650 km south of Karachi, into a modern town. Then onwards things happened rather hurriedly. The irrigation system emanating from Guddu Barrage was instrumental in converting the wilderness into granary and the gas from Sui fields has made it possible to develop Pakistan's largest thermal generation complex with much need 1049 MW.

Plants for the construction of first phase of the Guddu Power Project took off in 1969, only 17 years ago, and during this period a new look has born in the area. The small, insignificant village of Guddu has emerged as a township with population of 15,000, provided with adequate health, education and other facilities which have brought urban life to the doorstep of the people living in a vast rural areas around the project site.

WAPDA has a mixed hydel and thermal power generation system, the former representing major share. This is quite natural for a country which has been endowed by the nature with sizeable hydel generation resources, and at the same time has rather limited fossil fuels at its disposal. But development of hydel power resources is a protracted process involving huge amount to develop large reservoirs like Mangla and Tarbela. In 1960's the process of industrialization and mechanised agriculture picked up in Pakistan for which adequate power supply became necessary. At that time a few diesel fed thermal power stations existed at Faisalabad, Multan, Shahdara etc., but discovery of natural gas at Sui gave birth to the plans of establishing a thermal generating plant in the closed source was increasingly felt in the face of the fact that the hydel generation at Mangla and Warsak depleted during winter months because of low river inflows.

Guddu 300 MW Combined Cycle Power Plant is an existing Guddu Thermal Power Station which comprises four conventional balanced draft/boiler/steam turbines (2 of 110 MW and 2 of 210 MW generating capacity) and a 600 MW Combined Cycle Plant (4 gas turbines and 2 steam turbines of 100 MW each). The commissioning of newly installed 300 MW Combined Cycle has boosted the generating capacity of Guddu Thermal Power Station up to 1,660 MW.

Scope of the Project

It was initially intended that the two Gas Turbines will generate 200 MW and one Steam Turbine will add another 100 MW of electric power, hence designated "300 MW Combined Cycle Power Plant". The units furnished by Siemens have a greater capacity, about 136 MW from each Gas Turbine and 147 MW from Steam Turbine. The scope of the project comprises specially of the following:-

* Two Gas Turbine and Generator units each rated 136 MW capacity, completed with auxiliaries and local control panels.

* One Steam Turbine and Generator unit of 147 MW capacity, complete with auxiliaries.

* Two units of Heat Recovery Steam Generators (HRSG), complete with auxiliaries.

* Step-up and Services Transformers, 220 KV cables, Switch-gears and associated Electric Equipment for transmitting the electric power plant to the National Grid.

* Associated Civil Works of Gas Turbine Building. Water Treatment Building, Intake Pumphouse and Cooling Tower.

* Addition of one 220 KV bay to the existing 220 KV switchyard.

* Foreign and jobsite training of WAPDA personnel.

Project Cost

The Pakistan Water and Power Development Authority was entered into a turnkey contract with Siemens Germany for the design, supply, installation and commissioning of 300 MW Combined Cycle Power Plant. The contract was effective on June 20, 1990. The total Project cost in US Dollar is 201.010 million.

Power Sector 1959-60 1993-94 Increase

Installed Production Capacity (MW) 119
Hydel Power 52
Thermal Power --
Electricity Production (Million KW Hour) 781 (**)41989 54 Times
Annual Sale of Electricity (Mil. KW Hour) 740 (**)32826 44 Times
Annual Income from the Sale of
Electricity (Million Rupees) 71 (**)43633 615 Times
Number of Consumers 278297 (**)8583049 31 Times
@ (Actual) ** (Approx)

1ST APRIL 1959

Residential and Commercial 263270 8224659 31 Times
Industrial 11688 177145 15 Times
Agricultural 3061 154508 51 Times
Supply of Electricity to the Villages 609 50800 83 Times
Length of the Transmission Lines 7000 184000 26 Times
Grid Station 50 597 21 Times

WAPDA's 35 Years Power Supply to Villages

Province 1960 1994 Increase
Punjab 100 26465 264 Times
NWFP (including FATA & PATA) 509 11490 23 Times
Sindh -- 10532 88 Times
Balochistan -- 2400 100 Times

TOTAL:- 609 50891 84 Times

Project Financing

Following, foreign and local agencies financed this 300 MW project:
Asian Development Bank of Manila (ADB):

(US Dollar) 47.00 million
Kreditanstalt Fur
Wiederaufbau of
Germany (KFW) (DM) 220.50 million
Banque Bruxelles Lambert
of Belgium (BBL) 533.98 BEF
Pakistan WAPDA 401.06 million

Fuel Supply Situation

Natural gas is the primary fuel for all the existing and newly constructed 300 MW combined cycle units. Under contract with WAPDA, various gas producing fields in the vicinity of Guddu are supplying natural gas to the Thermal Power Station. The contractual daily quota is as follows:-
Sui Gas 110 MMCFD
Khandkot Gas 100 MMCFD
Mari Gas 100 MMCFD

Project Schedule/Status

The project is in its final completion stage. To date completion is 99 per cent. Both Gas Turbines and Steam Turbine have been synchronized with WAPDA system and are contributing electric power output to the National Grid for more than 20 months. The tentative synchronizing dates of all the three machines are as follows:-
Synchronizing Gas
Turbine GT-11: Sept. 27, 1992
Synchronizing Gas
Turbine GT-12: Dec. 07, 1992
Synchronizing Steam
Turbine ST-13: March 17, 1994.
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Title Annotation:Karachi, Pakistan
Author:Arshad, Muhammad
Publication:Economic Review
Date:Oct 1, 1994
Previous Article:Development of thermal projects.
Next Article:An overview of OGDC.

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