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Renewable Energy & Power Sector15 Concepts & Facts

Wind Energy, Hydro Power & Emerging Geothermal-Tidal Energy in India GK Questions & Answers

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Wind power generation harnesses kinetic energy governed by the aerodynamic equation P = 0.5 rho A * v^3, where mechanical output varies directly with air density rho, swept area A, and the cube of wind velocity v. In 1919, physicist Albert Betz formulated Betz's law, demonstrating that no wind turbine can convert more than 16/27, or roughly 59.3 percent, of the kinetic energy in wind. The National Institute of Wind Energy (NIWE), located in Chennai under MNRE, maps resource potential using anemometers and LiDAR systems. NIWE projects India's exploitable onshore wind capacity at over 695 GW at a 120-metre hub height, concentrated primarily across Gujarat, Tamil Nadu, Karnataka, and Rajasthan. Complementing onshore expansion, the National Offshore Wind Energy Policy of 2015 delineates maritime zones along the Gulf of Khambhat and Gulf of Mannar.

India's hydroelectric sector follows a dual classification: small hydro plants up to 25 megawatts (MW) fall under MNRE oversight, whereas large hydro projects exceeding 25 MW operate under the Ministry of Power. In 2019, the Union Cabinet recognized large hydro as renewable power, introducing dedicated Hydro Power Purchase Obligations (HPO) within the broader purchase framework. Pumped Storage Hydropower (PSH) facilities act as bulk water batteries, pumping water to upper reservoirs during off-peak hours and generating power during peak demands to stabilize grid frequency. Non-conventional development also explores geothermal energy in Ladakh's Puga Valley and Manikaran in Himachal Pradesh, alongside tidal potentials in the Gulf of Kutch.

Bulk clean power evacuation relies on the synchronized National Grid operating under the single-frequency architecture managed by the Grid Controller of India Limited (formerly POSOCO) and the Central Electricity Authority. Dedicated Green Energy Corridors transport variable power from resource-heavy southern and western states to northern consumption hubs. In Union and state public service commission assessments, physical and policy dimensions of non-fossil energy generation appear frequently. Question patterns examine Betz's limit calculations, the regulatory boundary separating small and large hydro, offshore viability gap funding, environmental clearances for Himalayan river projects, and technical measures countering renewable intermittency.

Key Concepts & Self-Assessment15 Key Facts

Review key Wind Energy, Hydro Power & Emerging Geothermal-Tidal Energy in India exam facts and rate your mastery to track revision.

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#1
India ranks fourth globally in installed wind power capacity, driven by extensive wind installations in Gujarat, Tamil Nadu, and Rajasthan.
#2
The Muppandal Wind Farm in Tamil Nadu represents one of the largest onshore wind energy complexes in the world.
#3
Hydroelectric projects in India are classified into Small Hydro (capacities up to 25 MW under MNRE) and Large Hydro (under Ministry of Power).
#4
Puga Valley in Ladakh and Manikaran in Himachal Pradesh represent India's primary high-temperature geothermal exploration zones.
#5
The Gulf of Khambhat and Gulf of Kutch in Gujarat provide the highest tidal energy potential on the Indian coastline.
#6
India updated its Nationally Determined Contributions (NDCs) in 2022, pledging to achieve 50% cumulative electric power installed capacity from non-fossil fuel energy sources by 2030.
#7
The National Offshore Wind Energy Policy was notified in 2015, identifying potential offshore exploration zones off the coastlines of Gujarat and Tamil Nadu.
#8
The National Institute of Wind Energy (NIWE) in Chennai functions as the autonomous technical institution under MNRE for wind resource assessment and turbine type certification.
#9
In March 2019, the Government of India declared large hydropower projects exceeding 25 MW as renewable energy sources, introducing Hydro Purchase Obligations (HPO) within Renewable Purchase Obligations.
#10
The 2,000 MW Subansiri Lower Hydroelectric Project on the Assam-Arunachal Pradesh border is India's largest run-of-the-river dam under development by NHPC.
#11
Pumped Storage Hydropower (PSH) projects operate as giant water batteries, pumping water to upper reservoirs during low-tariff off-peak hours and releasing it through turbines during peak demand.
#12
ONGC commenced drilling operations in 2023 for India's first commercial geothermal energy project in the geothermal field of Puga Valley at an elevation of 4,400 metres in Ladakh.
#13
The Ministry of New and Renewable Energy estimated India's total tidal energy potential at approximately 12,455 MW, with the Gulf of Khambhat accounting for 7,000 MW.
#14
The National Green Hydrogen Mission, approved by the Union Cabinet in January 2023 with an outlay of 19,744 crore rupees, targets producing 5 million metric tonnes of green hydrogen annually by 2030.
#15
Renewable Energy Certificates (RECs) are market-based tradeable instruments traded on power exchanges that allow obligated entities to satisfy statutory Renewable Purchase Obligations under the Electricity Act, 2003.

Subject Specialist Commentary

Analytical perspective & practical exam advice from the Master10 academic board

Educator's Insight
India's clean energy transition extends beyond solar power to include wind, hydroelectricity, and emerging non-fossil sources. India ranks fourth globally in wind generation, anchored by installations across Gujarat, Rajasthan, and Tamil Nadu, which hosts the large Muppandal wind farm. In hydroelectricity, small projects up to 25 megawatts operate under the Ministry of New and Renewable Energy, while large dams fall under the Ministry of Power. Meanwhile, exploration at Ladakh's Puga Valley targets India's high-temperature geothermal resources.
Questions in UPSC and SSC exams regularly test ministerial boundaries and energy sites. A recurring prelims trap involves hydropower classification: remember that large hydro projects exceeding 25 megawatts fall under the Ministry of Power, though they count toward clean energy targets. In geography papers, keep in mind that the Gulf of Khambhat and Gulf of Kutch hold India's highest tidal energy potential. For exam revision, recall India's commitment to generate fifty percent of its electric capacity from non-fossil sources by 2030.

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