As the charging pile (plug) of electric vehicle on the power side of the power grid, the particularity of its structure determines that the automatic communication system is characterized by many and scattered measured points, wide coverage and short communication distance. And with the development of the city, the network topology requires a flexible and expandable structure. Therefore, the following issues should be considered in the selection of the electric vehicle charging pile (plug) communication mode:
(1) Reliability of communication - the communication system shall withstand the test of harsh environment and strong electromagnetic interference or noise interference for a long time, and keep the communication unblocked.
(2) Construction cost - under the premise of meeting the reliability, the construction cost and long-term use and maintenance cost shall be comprehensively considered.
(3) Two way communication - it can not only upload information, but also release control quantity.
(4) Multi service data transmission rate - With the continuous growth of terminal traffic in the future, the communication between master station and sub station and between sub stations and terminals requires higher and higher data transmission rate to achieve multi service.
(5) Flexibility and scalability of communication - Because charging piles (plugs) have many control points, wide areas and decentralized characteristics, it is required to adopt standard communication protocols. With the development of "ALL IP" network technology trend and the continuous growth of power operation business, it is necessary to consider IP based business bearing, and it is required to facilitate installation, construction, commissioning, operation and maintenance.
