In most cases, distribution companies have to construct 20 Kv long lines for feeding far loads, while most of the time, the high voltage lines are passing by these loads. In this paper, the possibility of using the mobile substations connected to aforementioned high voltage lines for feeding this kind of loads and also the effect of using these substations on the network losses is studied. An economic analysis is done about the time needed for regaining investments of buying mobile substation by the help of decreasing the network losses. The suggested models are tested by the help of a simulation on DIgSILENT software and a simple distribution network.