Polish Power Transmission and Distribution Association (PTPiREE) was established on 29 August 1990. PTPiREE is an association of the Distribution Network Operators (Enea Operator, Energa – Operator, PGE Dystrybucja, Tauron Dystrybucja, innogy Stoen Operator and PKP Energetyka) and the Transmission Network Operator (PSE). It works for the transformation of the Polish power industry, aiming to improve the operational efficiency of the power network, as well as the quality of services and customer service. Its operation includes consulting, training and publishing.