First, the application background
At present, through continuous transformation and development of local power grids, the number of contacts and sections in the middle of 10kV distribution lines is increasing, and the lines are becoming more and more complex . By relying on the vacuum switch on the column, when the line is overloaded or faulty, the switches will be Automatic tripping and power failure protects the grid. However, the current grid monitoring and management system has the following problems:
1. The on-column switch of the distribution network has no monitoring equipment, and can not monitor the information of the opening/closing of the on-column switch;
2. The distribution of the power grid is mostly in remote areas. When the switch on the column is tripped due to a fault or the like, it is impossible to judge the exact location of the fault. It can only be searched by hand one by one, which causes great difficulties for timely repair and restoration of power supply;
3. The system cannot meet the monitoring and management needs of different management agencies in the power sector, and the efficiency is low.
4. The system networking is not flexible enough, the maintenance cost is high, and the scalability is poor.
Second, system architecture requirements
1. On-column switch split/close status information real-time monitoring and alarm, and can expand other information such as monitoring current and voltage safety threshold.
2. GPRS wireless networking, the system architecture is simple and reliable, and is not constrained by the location and environment in the location of the switch on the pole. The information transmission is stable and reliable.
3. Meet the communication of multiple data centers, and transmit the on-column switch monitoring information to different relevant departments.
Third, four letter solutions
    Program features:
1. The on-column switch monitoring terminal is connected to the four-letter F2114 IP MODEM through the RS232/485 serial port. After receiving the information of the monitoring terminal, the F2114 transmits the data to the main station center through the GPRS network.
2. The F2114 supports simultaneous transmission of up to five data centers to meet the needs of different regulatory agencies in the power sector.
3. Adopt transparent transmission mechanism, after receiving the information, the information will be transmitted to the center intact, and there will be no data errors caused by the need for packaging.
4. Adopt GPRS communication mode, the networking is simple and effective, and the data transmission is stable and reliable.
Four letter program and product advantages:
1. Active reporting, F2114 actively sends monitoring information and alarms to the central station, which can update the switch monitoring and alarm information on the grid column in real time.
2. Using the mature GPRS communication network, the networking is simple and effective, and the data transmission is stable and reliable.
3. F2114 provides 5 I/O ports and supports 5 digital inputs and outputs. It can not only monitor the switch information on the column, but also monitor other information such as current and voltage thresholds. The system flexibility and scalability are strong.
4. F2114 can support primary and secondary dual-center backup transmission, and communication of up to five data centers, and simultaneously transmit the information of the distribution network to multiple relevant departments in the first time to improve the joint management capability of the power grid.
5. F2114 adopts industrial-grade transmission communication module, which can adapt to the remote distribution of the switch on the grid and the harsh environment, ensuring the stability and reliability of the system.
Attachment: Four letter F2114 GPRS IP MODEM product features
â—†Using high-performance industrial-grade wireless modules and 32-bit communication processors
â—† Low power design, the lowest power consumption can be as low as 1mA
â—†WDT watchdog design, complete party drop mechanism to ensure that the data terminal is always online
â—† Convenient system configuration and maintenance interface
â—† Support primary and secondary dual data center backup transmission and multi-data center synchronous transmission (5 data centers)
â—†Support APN/VPDN
â—† Provide 5 channels of I / O, can achieve 5 digital input and output, compatible with 2 pulse output, 2 way mode
Quasi-input, 2-way pulse counting function
â—† Support access to the center based on domain name and IP address
â—† Embedded standard TCP/IP protocol stack for transparent data transmission
â—† Standard easy to use, power on can enter data transmission status
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