2. Through the data visualization of the charging platform, the time sequence characteristics of the comprehensive charging station and the bus charging station actually arriving at the charging vehicle are extracted. Secondly, the influence of charger topology on harmonic baud is established through simulation modeling, and the comparison between simulation data and measured data is given. Then, combined with the relevant national standards, the power quality indicators measured by the two stations are measured and evaluated qualitatively and quantitatively, and their advantages and disadvantages are compared. Finally, different experimental scenarios are designed according to the measured data, and the related factors affecting the harmonic characteristics of charging stations are deeply discussed. The results show that the harmonic level of comprehensive charging station is better than that of bus charging station. Compared with the electric bus, the electric private car produces less current harmonics to the charging station.
3. In addition, the total cost power, the range of harmonic cancellation between multiple charging piles, the switching events of electric vehicles, different load combinations and other factors will affect the power of the charging station, which may affect the quality. This method provides a new idea for harmonic monitoring and control of electric vehicle charging station. As the only way for the development of the times, new energy is being widely used in various fields. The application of new energy in automobile field has given birth to the great development of electric vehicle (EV). According to the report of the Ministry of Industry and Information Technology, in 20 18, the production and sales of new energy vehicles in China reached1270,000 and1256,000 respectively, making it the world's largest producer and seller of electric vehicles.
4. The driving and charging of electric vehicles will inevitably interact with the power grid and transportation network. Under the background of large-scale development of electric vehicles, electric vehicle charging is a supporting facility for electric vehicle charging, and the planning and layout of power exchange stations has become a research hotspot for the friendly development of electric vehicle industry. There are a large number of power electronic converters and nonlinearities in the charging facilities of electric vehicles, which will inevitably affect the power quality of the distribution network, such as voltage sag, grid harmonics, voltage flicker and three-phase unstable balance. Therefore, it provides a premise and foundation for the identification of power quality disturbance of electric vehicle charging station, which can be effectively used for the orderly charging of electric vehicles and the operation scheduling of charging stations, and is conducive to the friendly interaction and promotion between electric vehicles and power grid.