Tenaga Nasional

Lembaga Letrik Pusat (1949–1965)

The Lembaga Letrik Pusat (Central Electricity Board, CEB) was established and came into operation on 1 September 1949. The Board was to become heir to three major projects considered by the Electricity Department following its re-establishment in April 1946 which were the Connaught Bridge Power Station, Cameron Highlands Hydroelectric Project and the development of a National Grid. CEB eventually became the owner of 34 power stations with a generation capacity of 39.88 MW, including a steam power station in Bangsar with a capacity of 26.5 MW, a hydroelectric power station at Ulu Langat with a capacity of 2.28 MW, and various diesel powered generators with a total capacity of 11.1 MW.

Lembaga Letrik Negara (1965–1990)

On 22 June 1965, the Central Electricity Board (CEB) of the Federation of Malaya was renamed the Lembaga Letrik Negara (National Electricity Board, NEB) of the States of Malaya. By the 1980s, the Board was supplying the whole peninsula with electricity, replacing the Perak River Hydro Electric Power company (PRHEP) and its subsidiary Kinta Electrical Distribution Co. Ltd (KED) in 1982, Penang Municipality in 1976, and areas supplied by Huttenbach Ltd in 1964, which included Alor Setar, Sungai Petani, Kulim, Lunas, Padang Serai, Telok Anson, Langkap, Tampin and Kuala Pilah.

On 4 May 1988, Prime Minister Mahathir Mohamad announced the government's decision on a policy of privatisation. Two pieces of legislation were passed to replace the Electricity Act and to provide for the establishment of a new corporation. Tenaga Nasional Berhad (TNB) was formed in 1990 by the Electricity Supply Successor Company Act 1990, to succeed the National Electricity Board (NEB) of the States of Malaya.

Divisions

Generation

Plans to expand its generation capacity include increasing hydroelectric generation by 2015 and commissioning the first nuclear power plant in Malaysia by 2025 if the government decides to include nuclear as an acceptable energy option. In 2021, Tenaga became part owner of the repowered Blyth Offshore Wind Farm in England.

In 2019, in efforts improve the efficiency, agility and performance of the company, TNB underwent an internal restructuring to split its domestic power generation and electricity retail businesses into two new wholly-owned subsidiaries. The internal restructuring was completed in 2020 following the incorporation of TNB Genco.

TNB Power Generation Sdn Bhd (TNB Genco) owns and operates thermal assets and hydroelectric generation schemes in Peninsular Malaysia. TNB Genco is currently Malaysia’s largest power producer contributing to 52.4% of the generation market share in Peninsular Malaysia.

Grid

The TNB Group has a complete power supply system, including the National Grid, which is energised at 132, 275 and 500 kilovolt (kV), with its tallest electricity pylon in Malaysia and Southeast Asia being the Kerinchi Pylon located near Menara Telekom, Kerinchi, Kuala Lumpur. The National Grid is linked via a 300 MW HVDC and 132 kV HVAC interconnection to Thailand and 230 kV submarine cables to Singapore.