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 01.11.2010 into TNEB Ltd.; Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO); and Tamil Nadu Transmission Corporation Limited (TANTRANSCO).
To satisfy the energy needs of the State, Tamil Nadu Generation and Distribution Corporation Limited has conventional installed capacity of 16,034.58 MW as on 01.04.2020 which includes TANGEDCO owned generating stations, share from the Central Generating Stations (CGS) and Private Power Purchase and non-conventional (Renewable) installed capacity is 15,871.29 MW which includes Hydro, Wind, Solar, Biomass and Co-generation plants.INSTALLED CAPACITY AS ON 01.04.2020