ELECTRIC VEHICLE CHARGING AND UNLOADING EFFECT ANALYSIS ON THE POWER GRID

The global energy efficiency and environmental protection have become more and more important at this time, and the production of electric vehicles (EVs) is therefore accelerating. The efficiency of electric vehicles is a strong one and other kinds of electricity can be used as fuel as a prominent feature, and electric vehicles are seen as eco transport for the 21st century. The electric vehicle is being gradually taken care of by car manufacturers, policymakers and environmental organizations. Electric vehicles can reduce pollution by draining vehicles as zero-emission vehicles dramatically to boost the environment and change the electricity system. The author, therefore, agrees that in our country electric vehicles should be actively developed, but that large-scale EV charging is a practical issue in the grid service and the distribution system planning. It could have a significant impact on the performance of the network, including overloading, output reduction, decreased service quality and increased power losses. With the movement of the light vehicle fleet to electric movement, a "vehicle to grid" (V2G) power is offered. V2G makes sense only if there is a connection between the car and the electricity market. This article discusses briefly the impact of the charge on the dispatch system, the contributing factors, the methods of charging control which decrease the impact on the distribution network and V2G techniques. Address the EV phenomenon based on the current state of development and the challenges.