Which corporation is responsible for planning, maintaining, and operating the high-voltage Transmission System?

The National Transmission Corporation (TRANSCO) is specifically tasked with the planning, maintenance, and operation of the high-voltage Transmission System. This corporation plays a critical role in ensuring that the electricity generated from power plants is effectively transmitted over long distances to reach distribution systems.

TRANSCO oversees the infrastructure necessary to transport electricity, including high-voltage transmission lines and substations. Their responsibilities also include integrating new energy sources into the grid and ensuring compliance with regulatory standards, thereby maintaining reliability and stability within the transmission network. Given these roles, it is clear why TRANSCO is recognized as the principal entity responsible for managing the high-voltage transmission system.