RCCN WeChat QrCode
Mobile WebSiteElectric cars are an indispensable choice for many future modes of travel. In a modern society that is highly dependent on personal transport equipment, large-scale use of electric vehicles can reduce carbon emissions. However, the shift from fuel-powered cars to electric vehicles is not only for the transportation industry It is also a very big challenge for the power network. If all of the U.S. fuel vehicles are replaced by electric vehicles, the power grid will be instantly destroyed.
Electric vehicle charging to the grid brought a new load
However, caution should be exercised over cities where electric vehicles are getting faster, and if every home in a city's neighborhood has electric cars, the demand for electricity in that neighborhood will double to other normal neighborhoods. The drastically rising power load can bring huge challenges to the city power supply system.
At present, the traditional public electricity uses high-voltage power transmission. Power plants output electricity through high-voltage power lines and enter various households through intensive power networks. If the demand for electric power in the popularized neighborhoods of electric vehicles surges, the high-voltage power lines may be affected Transmission security, power grid problems may seem like a national system problem, but most of the failures are started in the community.
When the grid reaches the limit load, it will cause the transformer overload and trigger an explosion. The power supply department needs to configure more transformers to solve this problem. As more and more people use electric vehicles, the whole community needs to configure more transformers and transformers And the installation cost is very high, which means that for the citizens of the entire community, whether or not you buy an electric car, you have to share the cost with other electric users.
Time interval to reduce the pressure
The challenge with electric cars is clear, but the benefits are also significant, at least for the high upgrade costs, but electric cars alone can not subvert the way the community lives today. National Research China's Vehicle Systems Engineering Analysts believe that electric vehicles to bring electricity demand is a significant peak and trough period, the peak is mainly after 6 pm, when the owner returned home to start cooking, that is, electric car charging time . Electricity demand in the early hours downturn, you can make the electric car charging in this time period, most electric car manufacturers have set up the charging system, according to the user next time the car reasonable time to arrange charging time, through this setting, Can greatly ease the electric car on the power supply pressure.
Electric cars are still very attractive to utilities, and some cities provide financial subsidies to households that install charging piles at home. The Los Angeles Department of Power provides a $ 500 subsidy if you promise to charge during off-peak hours , You can enjoy the discounted price. The popularity of electric vehicles will also promote the power sector to introduce more abundant energy systems, such as solar power generation. Electric vehicles can rely on solar charging while traveling, power can be delivered to grid systems during peak demand hours, or wind power can be used at night to meet day-to-day forms of demand. This modular renewable energy storage The solution addresses one of the biggest challenges facing wind and solar.
The electric car craze has the opportunity to promote the rapid development of electricity and the entire renewable energy.
