Integration of Distributed Generation System and Electric Vehicle Charger in V2G mode for Grid Voltage Sag Mitigation

Due to the enormous growth in load demand and the presence of many causes of disturbances at the distribution level, power quality issues are a serious concern these days. Sudden load variations or distribution system faults can cause a voltage sag, or a drop in line voltage magnitude. The integration of EV and distribution generation systems on the power grid can be used for grid voltage sag mitigation. Many problems can arise, such as the significant penetration of electric vehicle charging will increase the load on the grid, and can have a significant impact on the design and operation of the power supply system and protective equipment. EV batteries can be used as energy storage instead of an electrical load. The vehicle to grid (V2G) concept was born out of this possibility. EV chargers in V2G mode and Distributed Generation systems(DGs) are used to explore the possibilities of voltage improvement during voltage dips. In the Matlab/Simulink system, several types of faults that cause voltage dips are simulated. Voltage signals are analyzed at different locations on the grid when DGs and EV chargers are inactive, i.e. in standby mode and when they operate in V2G mode with the DGs in active mode. The method reduces the variation between the minimum and maximum voltages by smoothing the network's voltage profile.