Robust Stability Control for Electric Vehicles Connected to DC Distribution Systems

Wei Teng,Shumin Sun,Yuejiao Wang,Yan Cheng,Shibo Wang,Peng Yu

doi:10.3389/fenrg.2021.740698

Abstract

DC power distribution systems will play an important role in the future urban power distribution system, while the charging and discharging requirements of electric vehicles have a great impact on the voltage stability of the DC power distribution systems. A robust control method based on H∞ loop shaping method is proposed to suppress the effect of uncertain integration on voltage stability of DC distribution system. The results of frequency domain analysis and time domain simulation show that the proposed robust controller can effectively suppress the DC bus voltage oscillation caused by the uncertain integration of electric vehicle, and the robustness is strong.

Highlights

Electric vehicles have become an important part of the low-carbon economy and the world is in the stage of transformation from fuel vehicles to new energy vehicles (Needell et al, 2016; Wang et al, 2019; Ding et al, 2020; Connor et al, 2021; Zhang et al, 2021)
H∞ loop shaping method combines the advantages of H∞ technology and loop shaping method
This paper analyzes the voltage fluctuation of DC distribution system before and after adding robust controller when one or two electric vehicles are connected with preset chopper parameters (Table 2) and the proportion and integral coefficient of chopper power outer loop and current inner loop change

Summary

INTRODUCTION

Electric vehicles have become an important part of the low-carbon economy and the world is in the stage of transformation from fuel vehicles to new energy vehicles (Needell et al, 2016; Wang et al, 2019; Ding et al, 2020; Connor et al, 2021; Zhang et al, 2021). This paper analyzes the voltage fluctuation of DC distribution system before and after adding robust controller when one or two electric vehicles are connected with preset chopper parameters (Table 2) and the proportion and integral coefficient of chopper power outer loop and current inner loop change. From the above simulation results, it can be seen that the robust controller based on H∞ loop shaping method fully considers the influence of electric vehicle integration and chopper parameter perturbation on DC voltage stability, which can effectively improve the stability of the system and ensure the robustness

CONCLUSION

DATA AVAILABILITY STATEMENT