As part of the Azadi Ka Amrit Mahotsav, POWERGRIID is commemorating landmark achievement of completion of One Nation-One Grid-One Frequency.
Prelims, GS-III: Industry and Infrastructure
Dimensions of the Article:
- More about India’s Power grid
- About maintaining one frequency (One Nation-One Grid-One Frequency)
More about India’s Power grid
- The Indian Power system for planning and operational purposes is divided into five regional grids and this national grid management on a regional basis started in the sixties.
- Initially, State grids were interconnected to form a regional grid and India was demarcated into 5 regions namely Northern, Eastern, Western, North Eastern and Southern region. – The integration of regional grids, and thereby establishment of National Grid, was conceptualised in the early nineties.
- 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.
- 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).
About maintaining one frequency (One Nation-One Grid-One Frequency)
- ‘One Nation, One Grid, One Frequency’ was achieved in 2013 when the southern Region was connected to the Central Grid and hence, all 5 regional grids are synchronously connected forming a central grid operating at one frequency –
- North Eastern and Eastern grids (Connected in 1991)
- Western region grid (Connected in 2003)
- North Grid (Connected in 2006)
- East Grid (Connected in 2006)
- South Grid (Connected in 2013)
- All possible measures are taken to ensure that the grid frequency always remains within the 49.90-50.05 Hz (hertz) band.
- Maintaining a consistent electrical frequency is important because multiple frequencies cannot operate alongside each other without damaging equipment. This has serious implications when providing electricity at a national scale.
- Synchronisation of all regional grids helped in optimal utilization of scarce natural resources by transfer of Power from Resource centric regions to Load centric regions.
- Further, this paved the way for establishment of a vibrant Electricity market facilitating trading of power across regions.