One Nation-One Grid-One Frequency

Contact Counsellor

Last Updated02/01/2022

State-owned Power Grid Corp. of India Ltd (PGCIL) celebrated the first anniversary of One Nation-One Grid-One Frequency.
SPOWERGRID celebrated the anniversary of this momentous occasion on 31st December, 2021 by organizing a number of events.

Grid management in the country, on a regional basis started in the sixties.
At the beginning, state grids were interconnected to form a regional grid and India was demarcated into 5 regions namely Northern, Eastern, Western, North Eastern and Southern regions.
With time each grid was connected to the other, to allow greater availability and transfer of power.
It all came together when the Southern Region was connected to the Central Grid, with commissioning of 765 kV Raichur-Solapur Transmission Line, thereby achieving ‘ONE NATION-ONE GRID-ONE FREQUENCY’.

The state-run Power System Operation Corp Ltd (Posoco) oversees the country’s critical electricity load management functions through the National Load Dispatch Centre (NLDC) and a set of regional load dispatch centres (RLDCs) and state load despatch centres (SLDCs).
India has 33 SLDCs, five RLDCs--for the five regional grids that form the national grid--and one NLDC.
All possible measures are taken to ensure that the grid frequency always remains within the 49.90-50.05 Hz (hertz) band.

The Power Grid Corporation of India Limited was incorporated on 23 October 1989 under the Companies Act, 1956
It is an Indian statutory corporation under the jurisdiction of Ministry of Power, Government of India and is headquartered in Gurugram, India and engaged mainly in transmission of bulk power across different states of India.