India’s renewable energy transition
Kartavya Desk Staff
Source: IE
Subject: Renewable energy
Context: India’s energy transition debate has shifted from capacity creation to system reform, as renewable generation now outpaces the grid’s ability to efficiently absorb and utilise it.
About India’s renewable energy transition:
What it is?
• India’s renewable energy transition refers to the shift from fossil-fuel–dominated power generation to a low-carbon system driven by solar, wind, hydro, and storage, supported by reforms in grids, tariffs, and electricity markets to ensure reliability and affordability.
Trends:
• Rapid capacity expansion: India’s installed solar and wind capacity has crossed 180 GW, making renewables among the cheapest sources of new power generation.
• Cost competitiveness: Solar and wind tariffs in India are now lower than new coal-based power, strengthening the economic case for clean energy.
• Smart grid foundations: Around 49 million smart meters have been installed nationwide, enabling time-of-day tariffs and demand-side management.
• Demand concentration vs resource location: Renewable resources are concentrated in western and southern states, while demand is highest in urban and industrial clusters elsewhere.
Current Indian status:
• Time-of-Day tariffs: States have mandated differential pricing for peak and off-peak hours to signal real system costs, supported by rapid smart-meter rollout, though behavioural response remains limited.
• Renewable curtailment: Despite sufficient solar and wind capacity, green power is frequently curtailed due to grid congestion, forecasting gaps, and rigid contract-based scheduling.
• Limited role of power exchanges: Only about 7–9% of electricity is traded on exchanges, restricting nationwide optimisation as most power remains locked into long-term PPAs.
• DISCOM reforms with lingering stress: Schemes like UDAY and RDSS improved infrastructure and metering, but weak revenue recovery continues to strain DISCOM finances.
Challenges associated:
• DISCOM financial stress: AT&C losses hover around 16%, while tariff under-recovery persists, limiting the ability of DISCOMs to invest in modern grids and flexibility solutions.
• Misaligned tariff design: Volumetric tariffs fail to recover fixed network costs, making efficiency gains and rooftop solar appear as revenue losses rather than system benefits.
• Cross-subsidy dependence: High-tariff industrial and commercial consumers cross-subsidise households and agriculture; their shift to open access or captive power destabilises DISCOM revenue bases.
• Limited demand flexibility: Time-varying tariffs alone cannot shift load at scale because most consumers lack automation, real-time information, and coordinated response mechanisms.
• Fragmented wholesale markets: Self-scheduling under long-term PPAs prevents least-cost dispatch of renewables across regions, leading to inefficiencies and higher system costs.
Way ahead:
• Prioritise distribution reform: Redesign incentives so DISCOMs earn returns for reliability, loss reduction, and system efficiency, not just electricity sales volume.
• Dynamic tariffs with automation: Combine time-of-day pricing with smart appliances, EV charging control, and automated demand response to manage peaks cost-effectively.
• Nationwide MBED: Implement market-based economic dispatch to ensure cheapest power is used first, with CERC estimating savings of about billion annually.
• Integrate captive power plants: Bringing captive generation into markets would increase liquidity, flexibility, and competition, lowering overall system costs.
• Redefine the DISCOM role: Shift DISCOMs from passive intermediaries to active system optimisers, managing demand, flexibility, and grid reliability in a renewable-heavy system.
Conclusion:
India’s energy transition now depends less on adding renewables and more on running the power system intelligently. Without distribution and market reforms, green power will remain underused despite surplus capacity. A grid that rewards efficiency, flexibility, and coordination will decide whether renewables become India’s advantage or its constraint.
Q. “Solar energy expansion in India faces constraints that are structural rather than technological.” Evaluate the structural constraints affecting large-scale solar deployment and their implications for India’s long-term energy security. Suggest measures to overcome these constraints. (15 M)