Torrent Power's scrip surged 11.93 per cent, while PTC India rose by 5.04 per cent and BHEL went up by 4.91 per cent on the BSE.
Similarly, Reliance Infrastructure climbed 4.90 per cent, Siemens (4.62 pc), Jaiprakash Power Ventures (3.98 pc), Tata Power (3.69 pc), Adani Power (3.62 pc) and Reliance Power (3.17 Pc).
Following the rally in these scrips, the BSE power index gained 3.26 per cent to 1,999.37.
It was earlier part of central transmission utility Power Grid Corporation. The exercise of hiving off POSOCO was aimed at putting in place an independent, secure and reliable power system operation entity at the national level as mandated under the Electricity Act, 2003.
"With transmission coming under competition and multiple transmission licensees operating, need was felt to ensure the independence and neutrality of the system operation function," the statement said.