Analysis the Impact of Electric Vehicles Integrated to the Distribution Network on Its Line Loss and Voltage

The Chinese government has proposed the goal of carbon peaking and carbon neutrality. It leads to a stronger promotion of electric vehicles. Lots of electric vehicles (EVs) integrated to the distribution network will create a significant impact on its operation. Some indicators will undergo significant changes such as load peak-to-valley ratio, line loss, and voltage deviation. Most existing literatures focus on economic benefit of the consumers instead of the distribution network. This paper analyzes the impact of EVs integrated to the distribution network on its line loss and voltage from the perspective of the distribution network. The article first derived the impact of electric vehicle access on line loss and voltage based on a simplified distribution network model. Then, a case study based on the IEEE33 node model are conducted. By comparing different integrating position and capacities, it comes to the conclusion that the line loss and the voltage fluctuation are positively related to EV capacities but negatively related to the distance between the integrating position and the power supply bus.