Managing India’s Renewable Energy Integration through Flexibility

India faces twin challenges as it scales renewable energy: the need for increased grid flexibility and the risk of coal-based plants becoming economically unviable due to falling plant load factors (PLFs). The report argues that transitioning existing coal plants into flexible resources is a cost-effective short-term solution. This conversion requires technical retrofits to allow for lower minimum loads, reduced start-up times, and increased ramp rates. While this path involves incremental costs of 5-10% of total project costs in NPV terms, it is significantly cheaper than deploying lithium-ion batteries or pumped hydro. The report recommends market-based mechanisms, such as capacity auctions and revised power purchase agreements, to compensate plant owners and ensure a transition toward a low-carbon electricity system.

• India's ambitious renewable energy targets—175 GW by 2022 and 275 GW by 2027—will result in renewable generation contributing 20.3% and 24.2% of total electricity requirements in 2021-22 and 2026-27, respectively.
• The integration of variable renewable energy increases the need for grid flexibility, specifically ramping requirements, which are expected to rise from 13.27 GW in 2017 to 75.05 GW in 2027, primarily between 5 pm and 7 pm.
• Coal-based plants in India are at risk of becoming stranded assets as average plant load factors (PLF) are projected to fall to approximately 50% by 2022; a PLF of 52% is identified as the threshold where a plant becomes economically unviable.
• Converting baseload coal plants to flexible operation is technically feasible, as demonstrated by pilot cases in Germany and the USA, and would require retrofits to achieve lower minimum load factors (30-40%), reduced start-up times, and increased ramp rates.
• The total incremental cost to convert a baseload coal plant into a flexible one is estimated at 5-10% of the total project cost in net present value (NPV) terms, or 8-22% in levelized terms.
• Flexible coal is significantly more cost-effective in the short term than cleaner alternatives; the upfront investment costs for lithium-ion batteries and pumped hydro are 500-2000% and 400-1800% higher, respectively, than the incremental cost of coal flexibility.
• Operating coal plants flexibly can reduce absolute CO2 emissions by approximately 0.11 million tons/MW due to lower average load factors (reducing from 85% to 40%) and a reduction in project life from 40 to 35 years.
• Lowering the minimum plant load factor of coal plants to 40% could reduce renewable energy curtailment from 3.5% down to 0.76%.
• To implement flexible coal cost-effectively, India needs to move away from cost-plus power purchase agreements toward market-based mechanisms, such as capacity auctions and the development of an ancillary services market.

APA

Sen, V., Trivedi, S., & Shrimali, G. (2018). Managing India’s Renewable Energy Integration through Flexibility. Climate Policy Initiative. https://www.climatepolicyinitiative.org/wp-content/uploads/2018/05/Managing-Indias-Renewable-Energy-Integration-through-Flexibility-.pdf

Chicago

Sen, Vivek, Saurabh Trivedi, and Gireesh Shrimali. Managing India’s Renewable Energy Integration through Flexibility. Climate Policy Initiative, 2018. https://www.climatepolicyinitiative.org/wp-content/uploads/2018/05/Managing-Indias-Renewable-Energy-Integration-through-Flexibility-.pdf.

Wikipedia

{{cite report |last1=Sen |first1=Vivek |last2=Trivedi |first2=Saurabh |last3=Shrimali |first3=Gireesh |title=Managing India’s Renewable Energy Integration through Flexibility |publisher=Climate Policy Initiative |date=May 2018 |url=https://www.climatepolicyinitiative.org/wp-content/uploads/2018/05/Managing-Indias-Renewable-Energy-Integration-through-Flexibility-.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{sen2018managing, author = {Sen, Vivek and Trivedi, Saurabh and Shrimali, Gireesh}, title = {{Managing India’s Renewable Energy Integration through Flexibility}}, institution = {Climate Policy Initiative}, year = {2018}, month = may, url = {https://www.climatepolicyinitiative.org/wp-content/uploads/2018/05/Managing-Indias-Renewable-Energy-Integration-through-Flexibility-.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }