Solar PV fed grid integration with energy storage system for electric traction application

A grid connected PV system with batteries as the energy storage element for application to electric train has been proposed in this paper. Battery packs and PV arrays are cascaded together to the utility through a bidirectional dc converter and boost converter. The PV module terminal voltage is regulated by a switched dc-dc step up boost converter, which uses the Incremental Conductance algorithm to track the maximum power point (MPP).A bidirectional DC/DC converter efficiently regulates flow of power between battery and grid. Bidirectional Inverter provides supporting grid functions which enhances grid stability. Simulation of the proposed system is performed in MATLAB/SIMULINK and the results are found to be satisfactory.