Southern Power Grid Electric Vehicle Intelligent Charging Station Solution
In order to support an unmanned and widely distributed electric vehicle charging infrastructure, IoT technology will become an indispensable technology. The optical wireless communication technology ROF provides a simple and flexible way for M2M communication and data acquisition of electric vehicle intelligent charging stations, allowing each electric vehicle intelligent charging station to be connected to the control center. Whether it is a single charging station deployed in a restaurant, or in a number of charging stations in a parking lot or shopping center, there will be a large amount of important information and instructions to be transmitted between all the smart charging stations of the electric vehicle and the control center. As long as the optical communication system is used, the control center can remotely manage all the work of the electric vehicle intelligent charging station, including user authentication, start and stop commands, transmission of user data, credit card payment procedures, and the like. The on-board wireless communication technology can also assist the control center to remotely manage the equipment shutdown caused by the failure of the electric vehicle smart charging station, and immediately detect the abnormality caused by vandalism.
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Intelligent charging station wireless solution based on optical wireless communication technology
The optical transceiver will transmit the above information to the power management billing center through the power fiber network to realize real-time information transmission. Similarly, real-time information transfer is achieved from the grid management billing center to the end of the charging pile.
The basic structure of the electric vehicle intelligent charging station includes a side fast charging machine, an energy storage battery, a regenerative battery maintenance machine, a charging control system, a cable distribution system, and a machine room.
In view of the fact that the charging pile of the electric vehicle intelligent charging station is dispersed and the data volume of the single charging pile is small, and in order to realize the high-speed wireless coverage of the electric vehicle intelligent charging station, the data transmission needs of the charging pile can be satisfied, and high-speed broadband can be provided. Access, the system uses a two-level wireless data transmission scheme as shown below:
(1) The charging pile of the local area collects the data of the charging pile to the intermediate node (referred to as the convergence node, the aggregation node is one of the charging piles) through the low-speed wireless data transmission mode of 400MHz frequency, and the WiFi middleware is built in the aggregation node. Convergence of data to WiFi wireless network data conversion.
(2) Using optical-borne wireless technology, the WiFi wireless RF signal is distributed to the remote node through the optical fiber, and the aggregation node accesses the WiFi wireless network through the remote node, and the aggregation node uploads the data of the charging pile through the WiFi wireless network to The control center realizes remote wireless acquisition of charging pile data.
At the same time, the remote node can also provide wireless coverage of the high-speed wireless network signal of the electric vehicle intelligent charging station, provide wireless access of other devices, meet the various application requirements of the charging station, and facilitate the expansion and upgrade of the electric vehicle intelligent charging station.
The specific implementation scheme of the charging station based on the optical wireless technology is as follows:
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