Abstract : In the new era of social and economic development, the level of urbanization in our country is also continuously improving, which makes the rapid rise of China's manufacturing industry and intensifies the competitiveness of the industry. If we want to make enterprises occupy a strong position in the competition Therefore, enterprises must follow the trend of the development of the times, strengthen the concept of environmental protection, and constantly explore the construction plan of new energy electric vehicle charging facilities to promote the sustainable development of the manufacturing industry. New energy electric vehicles can control exhaust emissions and a lot of noise, which is very in line with the actual needs of my country's development. Therefore, this article conducts an in-depth analysis on the construction and operation mode of energy electric vehicle charging facilities.
Key words : new energy; electric vehicle; construction of charging facilities; operation mode
According to the current situation, my country attaches great importance to the development of new energy electric vehicles in society, because the development of this vehicle is very in line with the development and trend of the current era, not only can protect the environment and reduce exhaust emissions, but also To a certain extent, my country's energy security is guaranteed. However, due to the influence of various factors, the development of electric vehicles has been affected. Therefore, in the process of construction, it is necessary to continuously strengthen the construction and improvement of related equipment, thus laying a good foundation for the development of new energy electric vehicles in my country.
1 Construction scheme of new energy electric vehicle charging facilities
In the new energy electric vehicle charging facilities, it is necessary to provide complete functions such as power distribution system monitoring, charging monitoring, charger control system, safety protection monitoring, etc., and on this basis, centralized monitoring of charging equipment, power distribution equipment, etc. management and control. In addition, appropriate control measures must be adopted to rationalize the control of charging facilities in relevant areas. Therefore, when studying the construction scheme of new energy electric vehicle charging facilities, we can start from the following aspects:
1.1 Charging station monitoring background
The monitoring background of the charging station is mainly composed of two objects, namely: 1 server and 2 workstations. Some researchers have shown through research that the monitoring background of the charging station can also appropriately increase the number of monitoring workstations and servers according to actual needs , the computers in the system are interconnected by the Ethernet [1]. The content that needs to be completed in the monitoring background of the charging station is very extensive, not only to collect, process and store the data of the charger and the power distribution system, but also to strictly monitor the operation of the charger and the power distribution system; in addition to the SCADA function of the power distribution station monitoring Unexpectedly, it also has some comparative application functions, such as: regulating the intelligent load, etc., which can make the charging station operate in a safe and reliable environment to a certain extent.
1.2 Distribution system monitoring
The first is the protection part. There are a lot of protection functions in the protection part, mainly: the incoming line change distribution microcomputer protection, with three-stage over-current protection, overload protection, etc.; the 0.4kV switch generally adopts the protection function that comes with the switch. A kind of overcurrent protection.
Secondly, the main functions of the measurement and control part include: remote measurement function of electrical parameters, remote signal function of switch position, and remote control function of important switches. Among them, the remote measurement function includes: the current and voltage separated by the power distribution system; its remote control function mainly includes: 10kV switch, 0.4kV incoming line switch, etc. [3]. In the 0.4kV side configuration segmented backup self-injection device, if one of the power sources loses power, the backup self-injection device must be used. This device can turn off the contact switch in time, which improves the charging efficiency to a certain extent. Stand for reliability during power supply.
The last is the specific configuration. The 10kV incoming line transformer is equipped with a microcomputer protection, measurement and control integrated device. The equipment included in the device includes: the protection of the incoming line transformer, the remote control function of measurement and the remote control function of the incoming line transformer switch. The equipment can be directly installed on the switch cabinet. Directly access the communication management device through the field bus, and give certain protection to the information while uploading. In the charging station, configure a monitoring screen, and install communication management, public measurement and control, and segmental standby automatic input devices on the screen. Its communication management device mainly carries out the tasks of information transfer, management and remote transmission; the public measurement and control device is mainly the power distribution system of the measurement and control charging station, collecting 0.4kV bus voltage, the position signal of the outlet switch, etc.; Make the switch self-injection function realize segmentation.
1.3 Charger control system
The DC charger mainly uses the rectification equipment to charge the battery of the electric vehicle, which mainly includes: power unit, control unit, electrical and communication interface, in general, it is mainly composed of rectifier cabinet and DC charging pile. Combination of multiple devices [2]. Among them, the power of the DC charger is compared with other devices. Its power is relatively large, and the change area of the output current and output voltage is also relatively large, which can make the batteries of various electric passenger vehicles meet the charging requirements.
1.4 Security (video) monitoring system
The system mainly monitors the situation of fire protection, access control and perimeter security. If necessary, it also monitors the video situation of the charging station, and obtains the monitoring information of the power distribution system and the alarm information of the charging machine through the communication management machine. , Use the video that has been completed to effectively combine the monitoring. Under normal circumstances, it is composed of a variety of devices, such as: infrared alarm, smoke alarm, camera, connecting cable, liquid crystal display, etc. [4].
2 New energy electric vehicle battery replacement operation mode
According to the current situation, in the operation mode of replacing the battery of new energy electric vehicles, the battery and the body of the electric vehicle are mainly separated, and the two are not effectively combined. Under this mode of operation, for users who purchase new energy electric vehicles, it provides users with great convenience. They only need to let the battery rental company replace, charge and purchase the battery. The battery replacement station replaces and manages batteries. In this mode of operation, the work of replacing, leasing and recycling the user's battery is essentially the core content of the operation mode. Among them, battery leasing requires a professional energy supply company to purchase batteries, and then provide them to the station construction company. Pay the construction fee so that users can directly replace the battery [5]. In addition, in this process, whether it is the leasing procedure or the rent, the relevant departments will make an accurate and unified decision after negotiation. When the user is using the battery, there will be some abnormal situations, among which the unbalanced capacity is a very common phenomenon. Therefore, in the process of building charging facilities, not only is the perfect testing equipment built according to actual standards, which can timely and reasonably test the battery capacity, but also the charging and discharging maintenance equipment needs to be built, which can be used during operation. It plays a role in maintaining safety and improves the safety of battery use and the effectiveness of battery capacity. Recycling batteries in the medium mode can achieve the environmental protection effect of recycling and reuse. On the one hand, the relevant waste batteries can be disposed of in time to reduce environmental pollution; on the other hand, it can reduce operating costs and enable enterprises to obtain large economic benefits.
3 Ankerui charging pile charging operation cloud platform
3.1 Overview
AcrelCloud-9000 Acrel charging pile charging operation cloud platform system uses Internet of Things technology to continuously collect and monitor data on car charging stations, electric bicycle charging stations and various charging piles connected to the system, and monitor the operating status of charging piles in real time. Carry out charging service, payment management, transaction settlement, resource management, power management, detailed query, etc., and at the same time give early warning of various faults such as charger over-temperature protection, leakage, charger input/output overvoltage, undervoltage, and low insulation; charging The pile supports access to the Internet through Ethernet, 4G or WIFI, and the user scans the code to charge through WeChat, Alipay, and Cloud QuickPass.
3.2 Applications
Applicable to residential areas and other property environments, various enterprises and institutions, hospitals, scenic spots, schools, parks and other public buildings, public parking lots, highway charging stations, bus hubs, shopping centers, commercial complexes, commercial plazas, underground parking lots, High-speed service areas, apartment office buildings and other occasions.
3.3 System structure
Field equipment layer: various sensors connected to the network, including multi-functional power meters, car charging piles, battery car charging piles, power quality analysis instruments, electrical fire detectors, current-limiting protectors, smoke sensors, temperature measuring devices, Smart sockets, cameras, etc.
Network communication layer: including on-site intelligent gateways, network switches and other equipment. The intelligent gateway actively collects the data of the field device layer equipment, and can perform protocol conversion, data storage, and upload the data to the built database server through the network. The intelligent gateway can store the data locally when the network fails, and wait for the network to recover. Continue to upload data from the interrupted position to ensure that the data on the server side is not lost.
Platform management layer: including application server and data server, completes the data exchange of all smart devices on site, and can realize real-time monitoring of the operating status of the power distribution system of the charging station, the working status of the charging pile, the charging process and personnel behavior on the PC or mobile terminal , and complete applications such as WeChat and Alipay online payment.
3.4 Platform Function Description
3.4.1 Charging Service
Charging facility search, charging facility viewing, map addressing, online self-service payment charging, charging settlement, navigation, etc.
3.4.2 Home page overview
Overview of the number of accounts opened on the day and month, recharge amount, charging amount, charging degree, charging times, charging time, cumulative number of accounts, recharging amount, charging amount, charging degree, charging times, charging time, and the corresponding quarter-on-quarter growth and year-on-year growth And piles, station distribution map navigation, charging statistics this month.
3.4.3 Transaction Settlement
Charging price strategy management, pre-charge management, bill management, revenue and financial related reports.
3.4.4 Fault Management
Fault management Fault record query, fault handling, fault confirmation, fault analysis and other management items provide convenience for users to manage faults and query.
3.4.5 Statistical analysis
Statistical analysis supports operation trend analysis and revenue statistics, which is convenient for users to browse the charging operation status of piles with analytical tools such as curves and energy consumption analysis.
3.4.6 Operation Report
Analyze the car, battery car charging station, pile operation, transaction, recharge, charging and alarm, and fault conditions according to the period specified by the user, and form an analysis report.
3.4.7APP, small program mobile terminal support
Through the functions of fuzzy search and map search, detailed information such as available electric piles and power stations can be queried. Scan code to charge, online payment: Scan the QR code of the charging pile to complete the payment. After the WeChat payment is completed, you can start charging.
3.4.8 Resource Management
Charging station file management, charging pile file management, user file management, charging pile operation monitoring, charging pile abnormal transaction monitoring.
3.5 Selection configuration
4 Epilogue
To sum up, the concepts of resource conservation and environmental protection are deeply rooted in the hearts of the people, and sustainable development has been valued by society and people. It is just that new energy electric vehicles are a kind of green product, which is a concrete manifestation of sustainable development, and can protect the environment and reduce environmental pollution. Therefore, relevant personnel should pay more attention to new energy electric vehicles, and build corresponding charging facilities and operation models, so as to promote the sustainable development of new energy electric vehicles and realize the harmonious coexistence between man and nature.