Inter-regional transmission security: national corridors remain stable under rising renewable pressure
The latest inter-regional transmission security review from NLDC, ERLDC and WRLDC highlights stable national transmission corridor operations despite localized stress conditions in parts of Western Region. All five national inter-regional corridors maintained zero ATC and zero N-1 violations on May 14, 2026.
One of the strongest indicators inside this inter-regional transmission security assessment is the near-perfect voltage discipline maintained across high-voltage substations. ERLDC achieved a 0.00 percent Voltage Deviation Index while multiple 765 kV nodes remained fully within IEGC operating limits.
The inter-regional transmission security picture, however, also revealed regional stress pockets. Maharashtra breached ATC limits in 21 blocks while Goa recorded repeated N-1 violations, indicating localized congestion and loading challenges inside Western Region operations.
Another major feature of this inter-regional transmission security environment is the increasing operational effect of renewable-driven market swings. The IEX duck curve deepened sharply as strong solar surplus pushed midday MCP down to Rs 1,568.70/MWh before evening recovery restored higher pricing.
EnergylineIndia.com observes that ATC compliance monitoring, renewable balancing and grid frequency stability are becoming increasingly interconnected operational priorities for India’s transmission ecosystem.