Impact of communication systems on grid node voltage and operation of a vehicle-togrid controller in a smart-grid scenario

Abstract

The impact of communication systems between different entities of a vehicle-to-grid (V2G) system, consisting of a controller, aggregator, multiple charging stations (MCS) and electric vehicles (EVs), affecting the distribution node voltage is discussed. The controller decides the amount of power to be exchanged between MCS and the grid. EVs either get charged or discharged at the charging station (CS) based on peak load or off-peak load hours. Based on the distance between the entities of the V2G, different communication technologies are proposed and, the respective communication channels are modelled. The impact of non-ideal communication systems on the node voltage at the test node where the CS is connected has been studied and, different regions of operation of the controller are determined. Changes in the controller are introduced to reduce the impact of bit error rate in data transmission using communication channels.