Power System Operation Corporation Limited (POSOCO) was a wholly
owned subsidiary of Power Grid Corporation of India Limited (PGCIL) till 2 January 2017.
It was formed in March 2010 to handle the power management functions of PGCIL.
It is responsible to ensure the integrated operation of the Grid in a reliable,efficient
and secure manner. It consists of 5 Regional Load Despatch Centres and a National Load Despatch Centre (NLDC). The subsidiary may eventually be made a separate company, leaving the parent firm with only the task of setting up transmission links. The load despatch functions, earlier handled by PGCIL, will now come up to POSOCO.