Globally, PHS is an established, proven and cost-effective technology for storing electricity at times of high generation and or low demand which can then be released into peak demand periods
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/pumped-hydro-storage-needs-20-billion-investment-india-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hydroelectricity
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-technology
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy