Abstract

With the increasing scale of the use of electric vehicles, impact of electric vehicle charging on the distribution system cannot be ignored. Considering uncertainty in the charging behavior, large-scale disorderly charging will cause the voltage deviation of distribution network exceeds the specified value. In the paper, based on the IEEE33 node as an example, the goal is to minimum each node voltage deviation by to controlling charge power, considering the constraints of the charging energy and the charging time, and optimized by the genetic algorithm. By using Newton Raphson power flow method, the voltage offset of each node before and after optimization is obtained, and the effectiveness of the charging load optimization model is verified by comparing and analyzing.

Highlights

  • In the context of worsening environmental conditions, fossil fuels are tight, in order to reduce the emissions of greenhouse gas, the electric car as the green traffic tool is used to replace the traditional fuel vehicles which has been vigorously promoted and developed rapidly

  • For the medium and low voltage power network, few research studies the voltage offset and harmonics problems of the distribution network caused by electric vehicle charging

  • The most studies mainly consider the orderly charging of electric vehicle model, only a small part take into account the uncertainty of the charging habits, even if some research [7] think about the uncertain charging habits but only considered the charging load and optimization and did not consider the impact on the voltage offset of the distribution network under the model

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Summary

Introduction

In the context of worsening environmental conditions, fossil fuels are tight, in order to reduce the emissions of greenhouse gas, the electric car as the green traffic tool is used to replace the traditional fuel vehicles which has been vigorously promoted and developed rapidly. For the medium and low voltage power network, few research studies the voltage offset and harmonics problems of the distribution network caused by electric vehicle charging. The most studies mainly consider the orderly charging of electric vehicle model, only a small part take into account the uncertainty of the charging habits, even if some research [7] think about the uncertain charging habits but only considered the charging load and optimization and did not consider the impact on the voltage offset of the distribution network under the model. This paper mainly studies the voltage offset of the distribution network at different permeability when electric vehicles are charging under the charging model of the uncertain charging habit

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