Article 3: Renewable Energy Curtailment and India’s Clean Energy Transition
Why in News: The Ministry of New and Renewable Energy has identified renewable energy curtailment as a major challenge for India’s clean energy transition. Rising instances of solar power being backed down due to transmission bottlenecks and excess daytime generation have raised concerns over grid preparedness.
Key Details
- Renewable energy curtailment refers to the reduction or backing down of electricity generation from renewable sources despite availability of generation capacity. This usually happens when the grid is unable to absorb or transmit the generated electricity efficiently.
- In April 2026, nearly 23 GWh of solar power was curtailed daily, according to reports cited by officials. This amount of electricity was sufficient to power nearly one-fourth of Delhi’s daily electricity requirement.
- According to MNRE Secretary Santosh Kumar Sarangi, grid modernisation and energy storage are essential for India’s renewable energy growth story. He stressed that the grid’s capacity to absorb renewable energy is becoming a critical issue for energy security.
- The government is working with the Ministry of Power, Central Electricity Authority (CEA), and Central Transmission Utility (CTU). The objective is to improve transmission infrastructure and ensure smooth renewable energy evacuation.
Renewable Energy in India
- India is the world’s fastest-growing major renewable energy market and has set ambitious clean energy targets. The country aims to achieve 500 GW of non-fossil fuel energy capacity by 2030 under its climate commitments.
- Renewable energy sources include solar, wind, hydropower, biomass, and small hydro projects. Among these, solar energy has emerged as the largest contributor to India’s renewable capacity expansion.
- States like Rajasthan, Gujarat, Tamil Nadu, and Karnataka are major renewable energy producers. These states possess high solar irradiation and suitable geographical conditions for renewable projects.
- India’s renewable energy transition is linked to its commitments under the Paris Agreement. The transition is crucial for reducing carbon emissions and achieving sustainable development goals.
What is Renewable Energy Curtailment?
- Renewable energy curtailment occurs when electricity generated from renewable sources is intentionally reduced. This happens despite the availability of renewable generation capacity and favourable weather conditions.
- The major reason behind curtailment is the inability of the electricity grid to handle excess supply. During daytime, solar generation often exceeds immediate electricity demand in some regions.
- Curtailment can also occur due to transmission congestion and inadequate evacuation infrastructure. In such cases, generated electricity cannot be transported efficiently to demand centres.
- Frequent curtailment discourages private investment in renewable energy projects. It affects project viability and reduces confidence among developers and investors.
Grid Infrastructure Challenges
- India’s electricity grid was originally designed around conventional thermal power plants. Renewable energy sources, especially solar and wind, are intermittent and require greater grid flexibility.
- Solar energy generation is concentrated during daytime hours, creating a mismatch with evening peak demand. This creates operational stress on grid operators and transmission systems.
- Many renewable energy projects are located in remote areas with weak transmission infrastructure. This delays evacuation of electricity and increases transmission losses.
- The rapid increase in renewable capacity addition has outpaced grid modernisation efforts. As a result, transmission bottlenecks have become more frequent in high-generation states.
Green Energy Corridor Scheme
- The Green Energy Corridor (GEC) scheme aims to strengthen transmission infrastructure for renewable energy integration. It focuses on creating dedicated transmission lines and substations for renewable power evacuation.
- The scheme supports both interstate and intrastate transmission networks in renewable-rich states. This is essential for transferring renewable electricity from generation hubs to consumption centres.
- MNRE is planning a substantially larger outlay for the scheme in the coming years. The objective is to improve storage systems, transmission capacity, and grid reliability.
- The programme aligns with India’s long-term clean energy and net-zero transition strategy. It also supports India’s target of reducing dependence on fossil fuels.
Role of Battery Energy Storage Systems (BESS)
- Battery Energy Storage Systems store excess renewable electricity generated during low-demand periods. The stored power can later be supplied during peak demand hours or grid stress situations.
- BESS improves grid stability and helps manage the intermittent nature of solar and wind energy. It reduces renewable energy wastage and minimises curtailment.
- Large-scale battery deployment is becoming a strategic necessity for India’s energy transition. It also enhances energy security and reliability of electricity supply.
- India is encouraging domestic battery manufacturing under initiatives like the Production Linked Incentive (PLI) scheme. This supports the broader vision of self-reliance in clean energy technologies.
Emerging Technologies for Grid Stability
- Grid-forming inverters help renewable energy systems behave more like conventional power plants. They improve voltage regulation and frequency stability in electricity networks.
- Synchronous condensers support grid stability by providing reactive power and inertia. They are increasingly important as thermal power plants are gradually phased down.
- Smart grids and digital monitoring systems enhance real-time management of electricity flows. These technologies improve forecasting, efficiency, and demand-response mechanisms.
- Advanced forecasting tools can better predict renewable generation patterns and electricity demand. This reduces operational uncertainty and enhances grid resilience.
Need for Geographical Diversification of Renewable Energy
- Renewable energy generation in India is highly concentrated in a few states like Rajasthan and Gujarat. This concentration increases pressure on regional transmission infrastructure.
- The government is exploring agri-photovoltaic systems and floating solar projects to diversify generation locations. These approaches reduce land-use conflicts while expanding renewable capacity.
- Floating solar plants also reduce water evaporation and improve solar panel efficiency. They are increasingly being promoted on reservoirs and water bodies.
- Geographical diversification improves grid balancing and reduces transmission congestion risks. It also promotes more equitable regional development.
Global Comparison: China’s Super Grid Model
- China is developing a large-scale “super grid” to transmit renewable electricity across long distances. The model uses ultra-high-voltage transmission lines for efficient power transfer.
- India may eventually require a similar nationwide transmission network. This would support large-scale renewable integration and energy security.
- A robust national grid can balance regional demand-supply variations more efficiently. It can also reduce curtailment and improve electricity market integration.
- Global experiences highlight that transmission infrastructure is as important as generation capacity. Without grid upgrades, renewable expansion alone cannot ensure clean energy transition success.
Challenges Before India’s Renewable Energy Transition
- Grid modernisation requires massive investments in transmission, storage, and digital infrastructure. Financing and implementation delays remain major concerns.
- Intermittency of renewable energy continues to challenge grid operators. Managing fluctuations in solar and wind generation requires sophisticated balancing mechanisms.
- Land acquisition and environmental clearances often delay transmission projects. This affects timely completion of renewable infrastructure.
- State electricity distribution companies (DISCOMs) face financial stress and operational inefficiencies. Their weak financial position affects renewable energy procurement and payments.
Way Forward
- India must accelerate investments in grid modernisation and smart transmission systems. A flexible and resilient grid is essential for large-scale renewable energy integration.
- Expansion of battery storage systems should be prioritised through incentives and policy support. This will reduce renewable energy wastage and improve reliability.
- Strengthening interstate transmission networks under the Green Energy Corridor scheme is necessary. This will improve renewable energy evacuation from high-generation states.
- Policy coordination among MNRE, Ministry of Power, CEA, and states should be enhanced. A coordinated institutional approach is critical for achieving India’s clean energy targets.
Conclusion
Renewable energy curtailment has emerged as a major structural challenge in India’s clean energy transition. Expanding renewable capacity alone is insufficient without parallel investments in transmission infrastructure, storage systems, and grid modernisation. India’s long-term energy security and climate goals will depend on its ability to build a flexible, resilient, and technology-driven power system.
EXPECTED QUESTION FOR UPSC CSE
Descriptive Question
Q. “Renewable energy curtailment has emerged as a major obstacle in India’s clean energy transition.” Discuss the causes, implications, and measures required to strengthen grid integration of renewable energy in India. (150 words, 10 marks)