Python Supervised Co-simulation for a Day-long Harmonic Evaluation of EV Charging  

作　　者：Lu Wang Zian Qin Lucia Beloqui Larumbe Pavol Bauer 

机构地区：[1]Department of Electrical Sustainable Energy,Delft University of Technology,Delft 2628 CD,Netherlands

出　　处：《Chinese Journal of Electrical Engineering》2021年第4期15-24,共10页中国电气工程学报（英文）

基　　金：funding from the Electronic Components and Systems for European Leadership Joint Undertaking under grant agreement No.876868;support from the European Union's Horizon 2020 research and innovation programme and Germany,Slovakia,Netherlands,Spain,Italy.

摘　　要：To accurately simulate electric vehicle DC fast chargers'(DCFCs')harmonic emission,a small time step,i.e.,typically smaller than 10μs,is required owing to switching dynamics.However,in practice,harmonics should be continuously assessed with a long duration,e.g.,a day.A trade-off between accuracy and time efficiency thus exists.To address this issue,a multi-time scale modeling framework of fast-charging stations(FCSs)is proposed.In the presented framework,the DCFCs'input impedance and harmonic current emission in the ideal grid condition,that is,zero grid impedance and no background harmonic voltage,are obtained based on a converter switching model with a small timescale simulation.Since a DCFC's input impedance and harmonic current source are functions of the DCFC's load,the input impedance and harmonic emission at different loads are obtained.Thereafter,they are used in the fast-charging charging station modeling,where the DCFCs are simplified as Norton equivalent circuits.In the station level simulation,a large time step,i.e.,one minute,is used because the DCFCs'operating power can be assumed as a constant over a minute.With this co-simulation,the FCSs'long-term power quality performance can be assessed time-efficiently,without losing much accuracy.

关 键 词：Power quality harmonic modeling charging infrastructure for electric vehicles(EVs) 

分 类 号：TM72[电气工程—电力系统及自动化]