Grid Operation in TN started by November 1964.The first Load Despatch Centre was operated from Erode.
Subsequently, the main Load Despatch Centre was formed in 1986 at Chennai and Sub Load Despatch Centre at Madurai.
In accordance with section 32 of Electricity Act, 2003 roles and functions of SLDCs are as under :
i) The SLDCs shall be the Apex Body to ensure integrated operation of the Power system in a State.
ii)SLDCs shall :Be responsible for optimum scheduling and dispatch of electricity within a state in accordance with the contracts entered into with the licensees or the generation companies operating in that State.
iii) Monitor grid operation
Keep accounts of the quantity of electricity transmitted through State Grid.
Exercise supervision and control over the inter-state transmission system.
Be responsible for carrying out real time operation for grid control and dispatch of electricity within the State through secure and economic operation of the State Grid in accordance with the grid standards and state grid code.