The Full Form of ISGS is Inter-State Generation System.

In a recent order, the Central Electricity Regulatory Commission (CERC) has asked the Power System Operation Corporation (POSOCO) to implement a pilot for the security constrained economic dispatch (SCED) of electricity for Inter-State Generating Stations (ISGS) across India.

There is a large matrix comprising 29 states and seven union territories that are beneficiaries of about 150 regional inter-state generating stations (ISGSs). Some of the ISGSs have as many as 15 beneficiaries spread across India and some of the states have a share from more than 40 ISGSs in their portfolio. Distribution companies (DISCOMs) meet majority of their daily power need by requisitioning or scheduling the generation from their portfolio of long-term, medium-term and short-term contracts following merit order dispatch of generation from its own portfolio of contracts. DISCOMs use all methods to harness the most economical resource. But, there is still scope for optimization by dispatching cheaper stations which are fragmented throughout India.