The subject of the proposed project is the replacement of DC converter stations Bukov, Bratislavaská and Kočkov, designed for powering trolleybus transport in Ústí nad Labem. The implementation of the project will modernise the transport infrastructure in order to increase its safety and reliability of operation of the trolleybus part of public transport as one of the sustainable forms of transport, the main benefits of the project are the savings of operating costs, the benefit will also be a positive impact on the RU in the form of emission reductions.