“…The top restriction is characterized by the most necessary power of DGS for performance of a certain type of works (undertakes the equal power of a locomotive of the ChME3 series which is taken as a basis). For the reviewed examples taking into account [11] and dependences (1-4) for dependence of the general expenses connected with modernization, Uzag, MJ, we have: Cost indexes of modernization, millions of UAH Power consumption of the store of energy, MJ U 0 -the liquidating cost of the basic diesel generator, UAH; Nf i , -the power of the power plant, kW; ge 0 -specific fuel consumption the diesel of the basic locomotive, kg/kW h; Δτ -a power differentiation interval during time, with; G i,j -fuel consumption of a hybrid locomotive, kg; ct -cost of fuel, UAH/kg; Сσ -expenses for maintenance and repair of a basic locomotive, UAH.…”