Polish TSO plans to invest PLN720 million in 2013 January 11, 2013 | Europe News Polish TSO Polskie Sieci Elektroenergetyczne Operator S.A. (PSE Operator S.A.) has earmarked a PLN720 million investment for the development of the country's transmission grid in 2013. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password