Patiala, Feb. 23 -- Punjab State Power Corporation Limited (PSPCL) has improved its performance, securing the 12th position with an 'A' grade among 52 power utilities in the country and the 7th position among state utilities. Meanwhile, Haryana's two power distribution companies-Uttar Haryana Bijli Vitran Nigam (UHBVN) and Dakshin Haryana Bijli Vitran Nigam (DHBVN)-have maintained their 'A+' grade and continue to lead in the overall rankings....