The idea is that these plants are run by the SPV without any change in their current ownership, for a reasonable period, within which their value could improve as demand picks up.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/40000-mw-capacity-govt-mulls-spv-run-stressed-power-units
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/financial-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electricity
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-thermal-power-corporation-ntpc
[5] http://admin.indiaenvironmentportal.org.in/thesaurus/lanco-infratech
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy