Wind Energy Legal Framework: PPAs, Repowering, and Regulatory Issues

Executive Summary

Wind energy is India's second-largest renewable energy source (after solar), with unique legal and regulatory frameworks. Understanding wind power laws is critical for developers, investors, and energy practitioners:

• Installed Capacity: ~45 GW (2024), target 140 GW by 2030
• Regulatory Framework: MNRE wind power policy, SERC tariff regulations
• PPAs: Long-term wind PPAs, forecasting and scheduling
• Repowering: Replacing old turbines with modern, high-capacity WTGs
• Offshore Wind: Emerging sector, separate regulatory framework

This guide examines wind energy policies, PPA structures, repowering regulations, and offshore wind framework.

1. Statutory Framework

Electricity Act, 2003

MNRE Wind Power Policies

2. Wind Energy PPA Framework

Wind Power Purchase Agreements

Wind Tariff Determination (SERC)

3. Wind Resource Assessment and Site Allocation

Wind Zones in India

Wind Site Allocation Process

4. Forecasting and Scheduling for Wind Power

Forecasting Obligations

Deviation Settlement Mechanism (DSM)

5. Wind Energy Repowering Policy

Repowering Framework (MNRE, 2016)

Repowering Benefits

Repowering Application Process

6. Wind-Solar Hybrid Projects

National Wind-Solar Hybrid Policy, 2018

Hybrid Project Benefits

7. Offshore Wind Energy Framework

Offshore Wind Policy, 2022 (Revised)

Offshore vs. Onshore Wind

Offshore Wind Regulatory Challenges

8. Wind Energy Transmission and Evacuation

Pooling Substations

Green Energy Corridors for Wind

9. Compliance Checklist for Wind Projects

Pre-Commissioning

• Apply for wind site allocation to state nodal agency
• Conduct wind resource assessment (1-2 years data)
• Obtain land lease/purchase for WTG sites and access roads
• Apply for environmental clearance (if >25 MW or ecologically sensitive)
• Obtain forest clearance (if forest land involved)
• Execute PPA or confirm captive/merchant sale plan
• Apply for ISTS/STU connectivity
• Finalize WTG supplier contract (equipment, installation)

Post-Commissioning

• Commission WTGs, obtain CEA safety certificate
• Register with SLDC for forecasting and scheduling
• Engage QCA for wind forecasting
• Install SCADA, wind forecasting systems
• Submit commissioning certificate to discom/SERC
• Comply with daily forecasting and scheduling
• Monitor deviation, minimize DSM penalties
• File annual RPO compliance (if captive)
• Claim accelerated depreciation (if applicable)

10. Repowering Case Study

Example: Tamil Nadu Wind Repowering

Old Wind Farm (Year 2000):

• 50 turbines × 500 kW = 25 MW
• CUF: 27%
• Annual generation: 59 MU
• O&M cost: Rs 75 lakhs (Rs 30 lakhs/MW)

Repowered Wind Farm (Year 2023):

• 10 turbines × 2.5 MW = 25 MW
• CUF: 34%
• Annual generation: 74 MU
• O&M cost: Rs 38 lakhs (Rs 15 lakhs/MW)

Benefits:

• Generation increase: 15 MU (25% improvement)
• O&M savings: Rs 37 lakhs annually
• Reduced downtime: 15% → 5%
• Land optimization: Freed up space for other uses

11. Key Takeaways for Practitioners

1. Forecasting is Mandatory: All wind projects must forecast—engage SECI QCA or private QCA to minimize deviation penalties.

2. Repowering Offers 4-5x Gains: Replacing old <1 MW turbines with modern 2-3 MW turbines multiplies generation and reduces O&M.

3. Hybrid Wind-Solar Boosts CUF: Combining wind (night/monsoon) and solar (day) increases combined CUF to 35-40%.

4. Offshore Wind is High-Cost, High-Reward: 40-50% CUF but Rs 12-15 crore/MW capex—requires tariff support or VGF.

5. Pooling Substations Save Costs: Shared transmission infrastructure reduces per-MW evacuation cost.

6. Green Corridors Prioritize Wind: Dedicated transmission schemes for wind-rich states—leverage for faster connectivity.

7. Captive Wind Exempts CSS: Group captive wind farms avoid cross-subsidy surcharge—cost-effective for industries.

Conclusion

Wind energy remains a cornerstone of India's renewable transition, with robust policy frameworks supporting onshore expansion, repowering of aging assets, and offshore wind exploration. The combination of competitive tariffs (Rs 2.50-3.50/kWh), forecasting and scheduling maturity, and transmission infrastructure development positions wind power as a reliable baseload renewable source. Practitioners must navigate state-specific site allocation, environmental clearances, and grid connectivity while leveraging repowering incentives and hybrid project opportunities. As offshore wind matures and repowering scales up, wind energy will continue delivering cost-effective, clean electricity for decades.