Integration of electric vehicle charging system into distribution network

Transportation electrification is one of the most promising ways to limit the CO₂ emission from the transportation sector so as to avoid catastrophic climate changes in the future. However, a large-scale integration of electric vehicles will introduce new challenges to electric power systems operation, especially at distribution network level. This paper aims to analyze possible impacts of large-scale electric vehicle charging system on the distribution network, propose corresponding control methods for impact mitigation, and investigate potential benefits of system performance improvement. In this paper, simulation model development of electric vehicle charging system is described firstly. After that simulation studies for both steady-state and dynamic performance analysis is introduced respectively. Simulation results show that with properly designed control strategies, the impact of large-scale charging system on power grid can be mitigated effectively; furthermore, distribution network can also benefit from electric vehicles due to the improved controllability of active and reactive power.