Analysis of PV and EV Chargers Integration Impact on Radial LV Distribution Network

Recently, there is more and more integration of photovoltaics (PV) and chargers for electric vehicles (EV) in existing low-voltage (LV) distribution networks. Integration of PVs and EV chargers individually can have a negative effect on the electrical variables of radial distribution networks such as voltages, loading of network elements, losses, etc. However, their simultaneous operation mitigates the negative impact caused by their individual integration. In this paper, different levels of PVs and EV chargers integration are considered and their effect on voltages, loading of cables, losses, as well as power exchange with the external network is studied. Simulation scenarios are implemented in DIgSILENT PowerFactory and power flows are analyzed. According to obtained results, the worst scenarios present two marginal scenarios - without PVs and 100% EV chargers and 100% PVs and without EV chargers. Values of observed parameters in these scenarios have the highest deviations from rated values. In scenario with 50% PV and 25% EV chargers integration, voltage deviation from rated voltage, loading of cables and losses have the lowest value.