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One Nation One Grid One Frequency

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  • Categories
    Polity & Governance
  • Published
    3rd Jan, 2022


Power Grid Corporation Limited celebrated the anniversary of the achievement of “One Nation One Grid”, as a part of Azadi Ka Amrit Mahotsav.

Evolution of National Grid

  • 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 Grid
    • Eastern Grid
    • Western Grid
    • North Eastern Grid
    • Southern region
  • With time each grid was connected to the other, to allow greater availability and transfer of power. 
  • The North-Eastern and Eastern Grid were connected in October 1991.
  • Western Grid and North Eastern Grid were interconnected in March 2003.
  • In 2006, North and East grids were interconnected.
    • Thus, 4 regional grids Northern, Eastern, Western and North Eastern grids were interconnected to form a central grid operating at one frequency.
  • On 31st December 2013, Southern Region was connected to Central Grid in Synchronous mode with the commissioning of 765kV Raichur-Solapur Transmission line thereby achieving 'ONE NATION'-'ONE GRID'-'ONE FREQUENCY'.
  • The Srinagar Leh Transmission System was connected to the National Grid, and was dedicated to the nation in 2019.

Present total transmission capacity

  • Presently, the country has a total inter-regional transmission capacity of about 1,12,250 MW which is expected to be enhanced to about 1,18,740 MW by 2022.

Power Grid Corporation of India Limited

  • Power Grid is an Indian statutory corporation, working under the parent head of the Ministry of Power. 
  • It is headquartered in Gurugram. 
  • The organisation engages mainly in transmission of bulk power across India. 
  • Power Grid transmits around 50% of the total power generated in India.