Energy Infrastructure: Grid Modernization & DISCOM Reforms

UPSC Mains PYQs

Energy Infrastructure & DISCOMs (2021): "The fiscal instability of power distribution companies (DISCOMs) remains the weakest link in India's energy value chain." Critically analyze the structural challenges faced by DISCOMs and evaluate the effectiveness of the Revamped Distribution Sector Scheme (RDSS) and UDAY in driving commercial efficiency. (15 Marks, 250 Words)

📊 High-Yield Data & Statistical Fact Sheet

Energy Capacity & Efficiency Metrics:
- Total Grid Capacity: 532.74 GW total installed capacity.
- Non-Fossil Share: 283.47 GW (53.21%) derived from clean energy, exceeding the original NDC target of 40%.
- Solar & Wind Leads: Solar stands at 150.3 GW; Wind stands at 56.1 GW.
- Grid Loss Metric: Aggregate Technical and Commercial (AT&C) losses reduced to 15.4% under prepaid metering push.
- RDSS Financial Outlay: ₹3 Lakh Crore program targeting AT&C losses reduction to 12-15% by installing prepaid smart meters (over 4.05 Crore installed).

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1. DISCOM STRUCTURAL CRISIS & REFORMS

The DISCOM Crisis: Power distribution companies face high AT&C losses, large gap between Average Cost of Supply and Average Revenue Realized (ACS-ARR gap), and delayed subsidy repayments by state governments.
RDSS (Revamped Distribution Sector Scheme): A ₹3 Lakh Crore performance-linked scheme. Focuses on:
- Prepaid Smart Metering: Automates billing and eliminates collection defaults.
- Feeder Segregation: Separates agricultural feeders from domestic supply lines, enabling solarization under PM-KUSUM.
UDAY Scheme (2015): Allowed states to take over 75% of DISCOM debt to issue state bonds. It failed because it did not mandate smart metering or address electricity theft effectively.

Grid Intermittency Challenges: Mass wind and solar power injects variable power levels, causing grid frequency and voltage drops (the "duck curve" demand mismatch).
Storage Interventions:
- BESS (Battery Energy Storage Systems): Grid-scale batteries supported by Viability Gap Funding (VGF) targeting 4,000 MWh capacity to stabilize evening peak loads.
- Pumped Hydro Storage (PHS): closed-loop hydroelectric systems to store excess day-time solar power for release during peak hours.
Green Energy Corridor (GEC): Dedicated interstate transmission network designed to evacuate bulk renewable power from RE-rich states to industrial hubs.

One Sun, One World, One Grid (OSOWOG): A transnational solar grid connecting regions to share solar power across timezones, addressing the solar geographic limitation.
Strategic Petroleum Reserves (SPR): Phase I (5.33 MMT at Visakhapatnam, Mangaluru, Padur) plus Phase II expansion (commercial-cum-strategic reserves) to achieve ~90 days of net import storage.
Coal Gasification: National target to gasify 100 Million Tonnes of coal by 2030 to substitute fuel imports with clean coal syngas.

Target AT&C Loss Range: 12-15% under RDSS.
DISCOM Reform Outlay: ₹3 Lakh Crore (RDSS).
Energy Storage Support: Viability Gap Funding (VGF) for BESS.
Transnational Grid Initiative: OSOWOG (co-founded with France).
Subsurface Crude Storage: Strategic Petroleum Reserves (SPR) (ISPRL managed).
Clean Coal Transition Tech: Coal Gasification.
Installed Non-Fossil Ratio: 53.21% (exceeds 50% target).

Notes updated up to March 2026. Sources: CEA National Electricity Plan, Ministry of Power Releases.