Energy storage system for peak-power reduction of traction substation

This paper introduces the concept of energy storage system which allows to reduce demanded peak power of railway traction substation. The analysis of system sizing using real, measured data has been provided and described. Also the control method of proposed solution has been proposed and tested. Implementation of proposed energy storage system in traction substations should allow reducing not only a required peak power and fixed, exploitation cost, but in the result also voltage variations in railway DC lines as well as in AC distribution grid supplying these substations.