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Here is an overview of power sector scenario in Malaysia.
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Power Sector in Malaysia

Malaysia produces about 13 GW of electricity, out of which thermal energy constitutes 84% and hydroelectric energy makes up 16 %. The government anticipates an investment of $9.7 billion will be needed in the electricity sector through 2010. Majority of the amount will go towards coal-fired plants because the government is encouraging a shift away from the nation’s heavy dependence on natural gas for generation of electricity. Malaysia ultimately intends to achieve an entirely competitive power market with generation and transmission.
Tenaga Nasional
Tenaga Nasional Berhad (TNB) is the biggest electric utility firm in Malaysia and also the biggest power company in Southeast Asia. It supplies power throughout Peninsular Malaysia and state of Sabah. TNB generates, transmits, and distributes electricity, apart from other activities like testing, repairing, and maintaining power plants, providing procurement services, manufacturing switchgears, and coal mining and trading. The TNB group has full power supply system, including the National Grid. The National Grid is connected through 132 KV HVAC and 300 kV HVDC to Thailand and 230 kV cables to Singapore.
Sabah Electricity
Sabah Electricity is a power generation, transmission, and distribution company. It is the only power utility firm in Sabah, Malaysia. It has 54 generating stations. Sabah Electricity has capacity to generate 785 MW of power. The projected growth of demand of electricity is around 7.7% per year up to 2010. Power generation is chiefly from hydroelectric and thermal plants.
Sarawak Electricity Supply Corporation
Sarawak Electricity Supply Corporation (SESCO) is now known as Syarikat SESCO Berhad. It generates, transmits, and distributes power to Sarawak state. SESCO supplies power to about 382,000 customers. There are 36 power stations with a capacity of 750 MW having 64% gas turbines, 18% thermal generators, and 18% hydro turbines that are set up all over the state. SESCO generates power chiefly from hydroelectric and thermal plants.
National Grid
National Grid is a high-voltage power transmission system in Peninsular Malaysia. It is owned and controlled by Tenaga Nasional Berhad (TNB). The network covers the whole of Peninsular Malaysia, linking power generation stations owned by TNB and Independent Power Producers (IPP) to consumers. About 11, 000 km of transmission lines functioning at 132, 275, and 500 kV connects more than 400 transmission substations in Peninsular Malaysia. The 500 kV transmission network is the single largest transmission network to be developed in Malaysia. A plan of laying 730-km high-voltage DC transmission line and a 670-km undersea cable for Bakun hydroelectric dam is being considered. This will link TNB, SESCO, and Sabah Electricity. National Grid is linked to the transmission network of Singapore Power Limited at Senoko with a capacity to transmit 200 MW of power.

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