Usage of Flexible Distribution Generation to Provide 25 KV AC Power Supply of Electrical Train and Improvement of Power Quality Indexes in Upstream Grid

Considering to advantages of renewable energies as Distribution Generations, are applied so widely in all over of the world. In this paper is attempted to usage of these resources with power system to provide the consume power of electrical trains, but to reason of single phase power supply of electrical trains in 25 KV AC power systems and varying consuming power during time and distance, make power quality problems in upstream power systems. So purpose of paper is decrease of unbalance, cancel of current harmonics and achievement to unity power factor from upstream grid in spite of providing consume power of trains, these are achieved by implement of Instantaneous Power Theory on control of inverters interface Flexible Distribution Generation and upstream grid.