Leveraging on Repowering of Wind Sites for Potential Wind-Solar Hybrid Capacities: a Case Study

Hirwe Rahul Rajaram, Krishnan B., Balamurugan Guru


Renewable capacities are eco-friendly and are being welcomed globally. Suitable framework helps in deployment of renewable capacities at good pace. In India, wind development started in early 80’s and is well evolved today. The early wind generators were of kW series, ratings ranging from 200 kW to 800 kW. Many initially set up wind turbines are completing 30 years of operational life span. In India, repowering policy is being implemented to scale up the site capacity and to enhance generation. This paper intends to draw attention of researchers, policy and decision makers on repowering of sites and its utility from solar perspective. Developing wind-solar capacities together has a unique advantage of using of common resources optimally like, land, technical manpower and power evacuation infrastructure. At Kayathar, the National Institute of Wind Energy has wind turbine test bed with old wind turbines. Study is conducted by removal of old make turbines with that of modern turbines and using the set free area for solar installations. On comparing 40.86% more PLF is generated by 4 MW new turbines and 18 MW hybrid capacity produces ~17 times more energy from same site. The total GHG mitigated by the hybrid capacity is 27878.04 tonne of CO2 annually.


Hybrid power; plant load factor; repowering; solar power; wind power

Full Text:



Lima M.A., Mendes L.F.R., Mothé G.A., Linhares F.G., de Castro M.P.P., da Silva M.G. and Sthel M.S., 2020. Renewable energy in reducing greenhouse gas emissions: Reaching the goals of the Paris agreement in Brazil. Environmental Development 33: 100504.

Li J., Dong W., Oenema O., Chen T., Hu C., Yuan H. and Zhao L., 2019. Irrigation reduces the negative effect of global warming on winter wheat yield and greenhouse gas intensity. Science of the Total Environment 646: 290-299.

Banerjee M. and G. Dutta. 2019. Factors influencing grid interactive wind power industry in India. International Journal of Energy Technology and Policy 15(4): 351-372.

Shrimali G., Srinivasan S., Goel S. and Nelson D., 2017. The effectiveness of federal renewable policies in India. Renewable and Sustainable Energy Reviews 70: 538-550.

Roberts D., 2019. These huge new wind turbines are a marvel. They’re also the future. Vox. Retrieved May 20, 2019 from the World Wide Web: https://www.vox.com/energy-and-environment/2018/3/8/17084158/wind-turbine-power-energy-blades.

Celik A.N., Muneer T. and Clarke P., 2007. An investigation into micro wind energy systems for their utilization in urban areas and their life cycle assessment. In Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 221(8): 1107-1117.

Verma M., Ahmed S. and Bhagoria J.L., 2015. Re-powering of wind farms: State of art. International Journal on Emerging Technologies 6(2): 112.

Majid M.A., 2019. Wind energy programme in India: Emerging energy alternatives for sustainable growth. Energy & Environment 30(7).

Chaurasiya P.K., Warudkar V. and Ahmed S., 2019. Wind energy development and policy in India: A review. Energy Strategy Reviews 24: 342-357.

Jahangiri M., Shamsabadi A.A., Mostafaeipour A., Rezaei M., Yousefi Y. and Pomares L.M., 2020. Using fuzzy MCDM technique to find the best location in Qatar for exploiting wind and solar energy to generate hydrogen and electricity. International Journal of Hydrogen Energy.

Nematollahi O., Alamdari P., Jahangiri M., Sedaghat A. and Alemrajabi A.A., 2019. A techno-economical assessment of solar/wind resources and hydrogen production: a case study with GIS maps. Energy 175: 914-930.

Jahangiri M., Soulouknga M.H., Bardei F.K., Shamsabadi A.A., Akinlabi E.T., Sichilalu S.M. and Mostafaeipour A., 2019. Techno-econo-environmental optimal operation of grid-wind-solar electricity generation with hydrogen storage system for domestic scale, case study in Chad. International Journal of Hydrogen Energy 44(54): 28613-28628.

Jahangiri M., Nematollahi O., Haghani A., Raiesi H.A. and Alidadi Shamsabadi A., 2019. An optimization of energy cost of clean hybrid solar-wind power plants in Iran. International Journal of Green Energy 16(15): 1422-1435.

Jahangiri M., Haghani A., Heidarian S., Alidadi Shamsabadi A. and Pomares L.M., 2018. Electrification of a tourist village using hybrid renewable energy systems, Sarakhiyeh in Iran. Journal of Solar Energy Research 3(3): 201-211.

Jahangiri M., Haghani A., Mostafaeipour A., Khosravi A. and Raeisi H.A., 2019. Assessment of solar-wind power plants in Afghanistan: A review. Renewable and Sustainable Energy Reviews 99: 169-190.

Sangroya D. and J.K. Nayak. 2015. Development of wind energy in India. International Journal of Renewable Energy Research (IJRER) 5(1): 1-13.

WAsP, 2018. Retrieved Jan 22, 2020 from the World Wide Web: https://www.wasp.dk/dataandtools#wind-atlas

PVsyst, 2019. Retrieved Jan 24, 2020 from the World Wide Web: https://www.pvsyst.com/

National Institute of Wind technology, 2019. Retrieved Feb 2020 from the World Wide Web: https://niwe.res.in/n.

Roque L.A., Paiva L.T., Fernandes M.C., Fontes D.B. and Fontes F.A., 2020. Layout optimization of an airborne wind energy farm for maximum power generation. Energy Reports 6:165-171.

Cortez R.I. and J.R. Dorrego. 2020. Analysis of the wake effect in the distribution of wind turbines. IEEE Latin America Transactions 18(4): 668-676.

CO2 Baseline Database for the Indian Power Sector, 2019 Retrieved from the World Wide Web: http://cea.nic.in/tpeandce.html

Khare V., Nema S. and Baredar P., 2016. Solar–wind hybrid renewable energy system: A review. Renewable and Sustainable Energy Reviews 58: 23-33.