Context

• The rapid growth of solar power and wind energy, now the country's cheapest sources of electricity, has positioned India as a global leader in the renewable energy
• However, the pace of renewable energy deployment has begun to outstrip the development of transmission infrastructure, creating significant bottlenecks.
• While clean energy projects can be completed within months, transmission networks often require several years to build. 

Transmission as the New Bottleneck

• Growing Energy Demand and Renewable Expansion
  • India currently possesses around 250 GW of renewable energy capacity, with another 100 GW under construction.
  • As electricity demand rises and sectors such as transportation and industry become increasingly electrified, the country may require nearly 2,000 GW by 2050.
  • Meeting this target will necessitate one of the largest energy infrastructure expansions in the world.
• Constraints in Transmission Development
  • Despite impressive progress in renewable deployment, more than 50 GW of clean energy capacity remains unable to connect effectively to the grid.
  • The primary reason is the slow pace of transmission development.
  • New transmission corridors face challenges related to land acquisition, environmental clearances, regulatory approvals, and lengthy construction periods.
  • As a result, transmission infrastructure has emerged as the most significant barrier to India's clean energy transition.

Unlocking Capacity Through Existing Infrastructure

• Integrating Battery Storage
  • One of the most effective ways to improve grid efficiency is through battery storage.
  • Many renewable energy projects use their transmission connections only when electricity is being generated.
  • By storing excess electricity and releasing it during peak demand periods, batteries can significantly increase transmission utilisation.
  • This approach could unlock the equivalent of approximately 400 GW of additional clean energy capacity without requiring new transmission corridors.
• Utilising Coal-Based Transmission Corridors
  • Many ageing coal plants operate below capacity but continue to possess valuable transmission connections.
  • Locating renewable energy projects near these facilities allows clean power to use underutilised transmission infrastructure whenever coal generation declines.
  • This strategy can improve asset utilisation, reduce congestion, and support nearly 100 GW of additional renewable energy capacity.
• Leveraging Existing Substations
  • Existing substations provide another opportunity for rapid expansion.
  • Many substations have the ability to accommodate additional renewable energy connections with minimal upgrades.
  • When combined with storage systems, these facilities can help manage power flows more effectively and support around 100 GW of additional clean energy generation.

The Role of Advanced Transmission Technology

• Reconductoring and Grid Upgrades
  • A substantial portion of India’s transmission network still relies on conventional conductors that limit power transfer under high temperatures.
  • Replacing these with high-temperature, low-sag conductors through reconductoring can nearly double transmission capacity while using the same towers and rights-of-way.
  • This approach eliminates the need for extensive land acquisition and significantly increases grid efficiency.
• Creating Clean-Energy Superhighways
  • When advanced conductors are combined with storage systems and shared transmission infrastructure, the existing grid can support more than 1,000 GW of additional renewable energy.
  • These improvements effectively transform existing transmission corridors into clean-energy superhighways, capable of carrying much larger volumes of electricity at relatively low cost.

Economic and Industrial Benefits

• Enhancing Competitiveness and Energy Security
  • Grid modernisation delivers benefits that extend beyond environmental sustainability.
  • Improved grid utilisation lowers costs, enhances reliability, and strengthens energy security.
  • Reliable and affordable electricity is increasingly important for industries such as steel, aluminium, cement, chemicals, and data centres, all of which require continuous access to power at predictable prices.
• Maximising Infrastructure Investments
  • India plans to invest over $100 billion in transmission infrastructure and expand its network by approximately 40% over the coming decade.
  • Incorporating advanced technologies into these investments can maximise long-term returns while reducing future congestion and capacity constraints.

The Importance of Policy Reform

• Promoting Storage-Integrated Renewable Energy
  • Regulatory frameworks should encourage greater integration of storage systems with renewable energy projects.
  • Such measures can improve grid efficiency and ensure more effective use of transmission infrastructure.
• Encouraging Advanced Transmission Technologies
  • Procurement and regulatory policies should support advanced transmission technologies that provide higher capacity and better long-term performance, even if they involve slightly higher initial costs.
• Coordinated Planning and Renewable Energy Zones
  • The development of renewable energy zones alongside optimised transmission corridors is essential for reducing planning delays and ensuring that large volumes of low-cost clean energy can be transmitted efficiently across the country.

Conclusion

• India’s clean energy future depends not only on generating renewable electricity but also on delivering it efficiently.
• Transmission bottlenecks have become the defining challenge of the country's energy transition.
• Through grid modernisation, battery storage, advanced conductors, improved utilisation of existing infrastructure, and forward-looking policy reforms, India can unlock vast amounts of additional renewable energy capacity.
• A smarter, more resilient grid will not only accelerate the transition to clean energy but also support industrial growth, economic competitiveness, and long-term sustainable development.