Modeling and impact analysis of large scale V2G electric vehicles on the power grid

Electric vehicles (EVs) have received massive consideration in the automotive industries due to their improved performance, efficiency and capability to minimize global warming and carbon emission impacts. The utilization of EVs has several potential benefits, such as increased use of renewable energy, less dependency on fossil-fuel-based power generations and energy-storage capability. Although EVs can significantly mitigate global carbon emissions, it is challenging to maintain power balance during charging on-peak hours. Thus, it mandates a comprehensive impact analysis of high-level electric vehicle penetration in utility grids. This paper investigates the impacts of large-scale EV penetration on low voltage distribution, considering the charging time, charging method and characteristics. Several charging scenarios are considered for EVs’ integration into the utility grid regarding power demand, voltage profile, power quality and system adequacy. A lookup-table-based charging approach for EVs is proposed for impact analysis, while considering a large-scale integration. It is observed that the bus voltage and line current are affected during high-level charging and discharging of the EVs. The residential grid voltage sag increases by about 1.96% to 1.77%, 2.21%, 1.96 to 1.521% and 1.93% in four EV-charging profiles, respectively. The finding of this work can be adopted in designing optimal charging/discharging of EVs to minimize the impacts on bus voltage and line current.

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Safety and Reliability of Wireless Charging System for Electric Vehicles Based on the Yunnan Power Grid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.518.324 ◽

2014 ◽

Vol 518 ◽

pp. 324-328 ◽

Cited By ~ 1

Author(s):

Hong Liang Wang ◽

Juan Liu ◽

Min Cao ◽

Xian Fu Chen ◽

Da Da Wang ◽

...

Keyword(s):

Electric Vehicles ◽

Large Scale ◽

Power Transmission ◽

Power Grid ◽

Wireless Charging ◽

Wireless Power ◽

Gradual Improvement ◽

Electric Cars ◽

Huge Impact ◽

Battery Technology

Electric cars are emerged as the energy crisis and environmental problems have become more severe. Electric vehicles charging include contact and non-contact. The battery technology has not been solved absolutely for Contactless charging, in addition, charging pile construction will take up a lot of urban land, normal charge is slow, fast charge will have a huge impact to grid, the high cost of change the batteries, these drawbacks of electric vehicles has been hampered the large-scale development of EV. With the development and gradual improvement of wireless power transmission technology .wireless charging technology applied to electric vehicles has great prospects. In the wireless power charging process safe, reliable transmission is very important. In this paper, security and reliability problems have been discussed for the various aspects of wireless charging systems and combined analysis of the characteristics of Yunnan Power Grid for wireless charging systems of electric vehicles.

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Study on the Influence of Large-Scale Electric Vehicles on Power Grid

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.608-609.1566 ◽

2012 ◽

Vol 608-609 ◽

pp. 1566-1570 ◽

Cited By ~ 1

Author(s):

Wen Yang ◽

Chang Guo Zhai ◽

Xiao Shu Huang

Keyword(s):

Electric Vehicles ◽

Large Scale ◽

Power Grid ◽

Simulation Method ◽

Energy Market ◽

Monte Carlo Simulation Method ◽

Power Demand ◽

Charging Mode ◽

Green Transportation ◽

Load Characteristics

Nowadays, the depression of energy market and the ever rising price of gasoline make us pursue green transportation. With the forceful support from our government, Electric Vehicles (EVs) develop rapidly. When randomly being connected to the power grid in large scale, EVs will bring new problems to grid in operation. This paper analyzes the load characteristics of EVs and their impact on the power grid. Study the charging and discharging time and capacity of each type of EVs, based on the EVs’ charging mode in China. This paper adopts Monte Carlo simulation method to obtain expectation and standard deviation of power demand of a single EV, then calculates the overall power demand of large-scale EVs.

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Research on voltage stability and control strategy of power system considering grid connected charging of electric vehicles

Journal of Physics Conference Series ◽

10.1088/1742-6596/2121/1/012020 ◽

2021 ◽

Vol 2121 (1) ◽

pp. 012020

Author(s):

Weidong Fang ◽

Hao Lv ◽

Yiting Jiang ◽

Lingzhi Li

Keyword(s):

Electric Vehicles ◽

Energy Demand ◽

Large Scale ◽

Voltage Stability ◽

Power Grid ◽

Stable Operation ◽

Charging Station ◽

New Energy ◽

The Stability ◽

The Impact

Abstract The development of new energy vehicles is an important measure to deal with the growing energy demand and climate change. Especially in recent years, with the support of national policies and the maturity of electric vehicles(EVs) related technologies, the number of EVs has increased explosively, and the situation is very good. However, it also means that a large number of charging loads will be connected to the power grid, which will put great pressure on the safe and stable operation of the power grid. Although there have been many studies on the impact of EVs integration into modern power grid, most of the EVs load models are based on probability function and lack accuracy. Therefore, starting with the actual operation data of EVs charging station, this paper studies the influence of a large number of EVs charging loads on the static voltage stability of power grid. It is found that the charging load of large-scale EVs is added to the power grid, which significantly reduces the stability of power grid voltage, especially at the place connected to the EVs load and far away from the balance node. In addition, when the charging station adopts the time-of-use(TOU) price strategy, it can effectively improve the voltage stability of the whole network.

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Secure Large Scale Penetration of Electric Vehicles in the Power Grid

10.25148/etd.fidc007054 ◽

2018 ◽

Author(s):

Abla Hariri

Keyword(s):

Electric Vehicles ◽

Large Scale ◽

Power Grid

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Research on the impacts of large-scale electric vehicles integration into power grid

10.1063/1.5041187 ◽

2018 ◽

Author(s):

Chuankun Su ◽

Jian Zhang

Keyword(s):

Electric Vehicles ◽

Large Scale ◽

Power Grid

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Behavior of Electric Vehicles Charging and Discharging and Impact on the Grid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.556-562.1584 ◽

2014 ◽

Vol 556-562 ◽

pp. 1584-1587

Author(s):

Shao Jian Song ◽

Xiao Han Wang

Keyword(s):

Monte Carlo ◽

Electric Vehicles ◽

Large Scale ◽

Power Grid ◽

Monte Carlo Algorithm ◽

Direct Impact ◽

Proper Number ◽

Simulation Results ◽

The Impact ◽

Day By Day

With the promotion of our country policy about electric vehicles, the development conditions of electric vehicles are improving day by day. However, the application of large-scale electric vehicles will have a direct impact on the power grid. Guilin is taken as an example to analysis the impact of models including uncontrolled charging, controlled charging and controlled charging/discharging model in different scales on the power grid using the Monte Carlo algorithm. The simulation results show that the proper number of electric vehicles involved in the controlled charging/discharging model can effectively achieve the target of peak clipping and valley filling. However, after more than a certain number, it will bring new pressure to the power grid.

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