Electricity generation in Tamil Nadu until about 1908 was confined to a few tiny plants in Tea Estates run on water power and to a small hydro electric station at Kattery near Coonoor. The Government Electricity department was created in 1927. The Pykara Hydro electric Power Station was constructed by Sir John G. Henry Howard , a British Engineer and the first Chief Electrical Engineer of the then Composite Madras State Electricity Department and commissioned in 1933 with an original installed capacity of 70 MW. The Tamil Nadu Electricity Board was constituted with effect from 1st July 1957 under the Electricity Supply Act 1948 and came to be known as “The Madras State Electricity Board” with Padma Shri V.P. Appadurai appointed as Chief Engineer (Electricity).

The first thermal power plant was commissioned during 1971 at Ennore, Chennai with its first unit of 60 MW capacity. Naphtha based gas station of 10 MW capacity was commissioned at Narimanam during 1991-92.TNEB simultaneously ventured into wind generation and 120 units with a total capacity of 19.355 MW was commissioned in the period 1986-93. In 1992, the power sector was thrown open for private participation and the first independent power project was established by GMR Vasavi at Basin Bridge, Chennai.

Tamil Nadu Electricity Board (TNEB) was formed on July 1, 1957 under section 54 of the Electricity (Supply) Act 1948 in the State of Tamil Nadu as a vertically integrated utility responsible for power generation, transmission and distribution. The electricity network has since been extended to all villages and towns throughout the State. As per the provisions under the section 131 of the Electricity Act,2003 TNEB was restructured on 1.11.2010 into TNEB Limited; Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO); and Tamil Nadu Transmission Corporation Limited (TANTRANSCO).

In the G.O Ms No 114 dated 08.10.2008, Government of Tamil Nadu has accorded approval in-principle for the re-organisation of TNEB by the establishment of a holding company, by the name TNEB Ltd and two subsidiary companies, namely Tamil Nadu Transmission Corporation Ltd (TANTRANSCO) and Tamil Nadu Generation and Distribution Corporation Ltd (TANGEDCO) with the stipulation that the aforementioned companies shall be fully owned by Government. More...

Also, Energy Department, Govt of Tamil Nadu vide G.O (Ms) No. 7 dated 24.01.2024 has accorded approval for formation of Green Energy Company in the name of Tamil Nadu Green Energy Corporation Limited (TNGECL) to take over the green energy business ( Hydro, Wind, Solar etc.,) of TANGEDCO and to merge the Tamil Nadu Energy Development Agency (TEDA) and its functions with Tamil Nadu Green Energy Corporation Limited (TNGECL). Further, existing TANGEDCO is allowed to continue as Generation and Distribution entity until the commencement of business of the new companies and consequently to rename TANGEDCO as Tamil Nadu Power Distribution Corporation Limited (TNPDCL) and permit to carry on with the Power Distribution business of TANGEDCO. Based on the above notifications, the TNPGCL has been incorporated on 09.02.2024 and TNGECL has been incorporated on 10.02.2024. Subsequently provisional Transfer Scheme has been issued vide Notification No.90 dated 06.03.2024 (G.O. (Ms).No 32, Energy (B2), 6th March 2024) for providing and giving effect to the transfer of properties, interest, rights, liabilities, obligations, proceeding and personnel of TANGEDCO related to fossil fuel generation business and green energy business to TNPGCL and TNGECL respectively. This transfer scheme shall come into force on and from 6th March 2024. More...

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