The Assam State Electricity Board (ASEB), which was constituted in 1958 under Electricity (Supply) Act 1948, was entrusted with the main reponsibility of integrated development of the State Power System. Before its unbundling, Assam State Electricity Board (hereafter ASEB) was the sole agency in the state of Assam to generate, transmit and distribute electricity in the state of Assam.
In pursuance with The Electricity Act 2003 and under the purview of the Assam Power Sector Development Programme, the Government of Assam has set in motion the course of action of unbundling the ASEB initially into five Government companies.
The five companies are Assam Power Generation Corporation Ltd. (APGCL), Assam Electricity Grid Corporation Limited (AEGCL), Upper Assam Electricity Distribution Company Limited (UAEDCL) for the areas of supply in the Upper Assam Region, Lower Assam Electricity Distribution Company Limited (LAEDCL) for the areas of supply in the Lower Assam and Central Assam Electricity Distribution Company Limited (CAEDCL) for the areas of supply in the central areas of Assam. Later on, Government of Assam has notified merger of three Distribution Companies into one Distribution Company , i.e. Assam Power Distribution Company Limited (APDCL).
Assam Electricity Grid Corporation Limited (AEGCL) is a Public Sector Company registered under ‘Company Act, 1956’ and whole owned by Govt. of Assam. AEGCL was formed out of restructured Assam State Electricity Board (ASEB) in 2003 and was notified as the State Transmission Utility (STU).