On 1st July 1957, Tamil Nadu Electricity Board came into being and has remained the energy provider and distributor all these years.
After 53 years of journey the Tamil Nadu Electricity Board was restructured as per G.O.114 dated 08.10.2008 by establishing a holding company with the name "TNEB Ltd" and two subsidiary companies namely "Tamil Nadu Transmission Corporation Ltd.,"(TANTRANSCO) and "Tamil Nadu Generation and Distribution Corporation Ltd.," (TANGEDCO) as per the mandatory requirements of the Electricity Act 2003. Accordingly TNEB Ltd., was formed on 01.11.2010.
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.