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Stage II
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Key Design
Features | Plant Process
Overview
In 1998, Tuas Power embarked on the development for Stage II
of Tuas Power Station. Blocks 1 and 2 of the four-block Combine
Cycle Power Plants (CCP) development were commissioned in November 2001 and
January 2002 respectively, bringing the total generation capacity
of Tuas Power Station to 1,935 MW.
Construction of Blocks 3 and 4 began in February 2003 and was
completed by 2005, bringing Tuas Power Station to its licensed
capacity of 2,670 MW.
With the introduction of the CCPs, Tuas Power has a flexible
generation portfolio to operate more competitively in the National
Electricity Market.
Key Design Features
- Gas turbine, steam turbine and generator in single shaft configuration
- Natural gas as the main fuel and diesel as backup fuel
- On-load fuel switching capability
- Rapid start-up to full load
- Variable pitch inlet guide vanes enabling high cycle efficiency during partial load operation
- Triple pressure HRSG unit with reheat capabilities featuring natural circulation and vertical gas flow
- Diesel generator for black-start purpose
Plant
Process Overview
Two sources of natural gas from the West Natuna and South
Sumatra in Indonesia are piped to Singapore by submarine pipelines.
The natural gas is then distributed via pipelines from Jurong Island
on-shore receiving stations to Tuas Power Station.
The natural gas is regulated and fed to the combustors of the gas
turbine and ignited with compressed air to produce high temperature
hot gas. The hot gas is expanded through four stages of the turbine
section where mechanical work is extracted to drive the compressor
and the generator to produce electrical energy.
The exhaust gas from the gas turbine is ducted to the heat
recovery steam generator. Heat is transferred to the feedwater to
produce superheated steam to drive the steam turbine to produce additional electrical energy. |
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