For a long time, the problem of electricity meter data copying has been an urgent need to be solved by the power supply department but has not been effectively solved. The traditional manual meter reading is time-consuming and laborious, and the accuracy and timeliness cannot be reliably guaranteed. If the meter fails, it will not be found to cause the loss of user electricity data. At the same time, in today's highly informatized environment, user data statistics and real-time monitoring are a major issue to be solved urgently for relevant departments. The traditional electricity meter reading mainly has the following problems: First, it is difficult to enter the meter reading work, and it is necessary to communicate with the customer before the meter reading. If the customer is not at home, the meter reading work will not be possible, which will greatly reduce the work time; Second, the workload of meter reading is large, and the workload of one area is very huge. In some places, meters may require high-risk operations such as pole climbing, which does not guarantee the safety of workers; third, there is a possibility of errors in manual meter reading. If the data is copied incorrectly, there will be unnecessary troubles.
2. System topology diagram
In response to the current problems of power meter reading, Caimore Telecom relies on its rich experience in the Internet + industry and builds a set of basic solutions based on Internet + for the power industry market based on 4G/3G/2G network access products. The realization of intelligent power meter reading effectively solves the problems of efficient, stable and fast transmission of power data services, and is widely used in smart meter reading systems in various cities.
The remote power remote meter reading system consists of the power distribution center server of the power bureau, 4G/3G/2G DTU terminal transmission equipment and the meter data collection point located in the residential area. In order to achieve the most simplified networking application, all the meters in the same building in the residential area are first connected to the meter concentrator, and the electricity consumption data of each household is transmitted from the smart meter to the meter concentrator. The meter concentrator uses the serial port RS232/ RS485 is connected with the DTU terminal transmission equipment, and the meter data is sent to the corresponding power distribution center server through the operator's 4G/3G/2G network through the transparent transmission mode to realize the efficient and real-time online connection of the meter data and the power distribution data center system .
Through Caimao 4G/3G/2G DTU equipment, each household's power consumption can be transmitted to the server software of the power distribution center in real time at any time, so that the user's power consumption can be accurately and quickly understood, and manual meter reading errors can be avoided. At the same time, it is convenient for managers to quickly judge equipment failures, reducing maintenance costs.
3. System structure
Terminal layer: It is mainly composed of power monitoring meters and concentrators, functional energy meters, low-voltage power line carrier concentrators, load control terminals and collectors.
Network transmission layer: The power remote meter reading system uses Caimao 4G/3G/2G DTU for wireless remote transmission to communicate, and realizes the communication function between the central station server software and each concentrator. Through the use of 485 bus, low-voltage power carrier or wireless mobile mode, etc., the communication function between the concentrator and each collection terminal and meter is realized, so it has the characteristics of convenient installation, flexible integration, and certain economy. , It can fully meet the communication networking mode under different domestic environments.
Monitoring center server: main configuration king software, web server and database, etc.
4. System function
Modern building construction has placed many electric meters together. These meters have built-in single-chip microcomputers, which can read the actual power consumption data through the single-chip microcomputer, and can communicate with the outside through RS485 communication. Utilize the RS485 communication capability of DTU to connect it with the electric meter in parallel, and realize the connection with the mobile network and meter reading data service center through DTU. In this way, the meter reading data service center can directly access each electric meter, realizing real-time Application of online remote meter reading.
The remote meter reading system consists of three parts: meter terminal, DTU, and meter reading service center.
1) Electricity meter terminal: It mainly completes the recording of the user's electricity consumption and responds to external reading instructions.
2) DTU: Establish a data communication link, and forward data in the meter and meter reading data service center.
3) Meter reading service center: through communication with DTU, read the value of the meter.
1) Always online mode: Suitable for occasions with high meter reading frequency. After DTU is powered on, it will automatically connect to the mobile network and the meter reading data service center, and maintain the link between the meter and the meter reading data service center, and meter reading can be performed at any time;
2) Trigger online mode: It is suitable for occasions with low meter reading frequency, which can save transmission traffic expenses. In practice, when the meter has data to upload or when the meter reading data service center requests meter reading via SMS, DTU starts to connect the mobile network and the meter reading data service center to complete the data transmission between the two. When the transmission is completed, it will automatically Restore the standby state, which can save traffic;
5. The meaning of the plan
For the power sector, data copying of electricity meters has always been a headache, requiring a lot of manpower, material and financial resources. Because of the large number of electric meters and scattered geographical locations, it is extremely inconvenient for the staff. Power companies can use 4G/3G/2G mobile data networks to monitor important power nodes, automatically read and analyze relevant data, and can further remote control or equipment failure maintenance, which can reduce human resources, shorten repair time and Save the cost of dedicated line construction.
6. Application areas
The remote meter reading solution solves the problem of scattered distribution and difficult management. However, wireless DTU is one of the mature application solutions, and DTU has good mobility, wide coverage, and low communication cost. It is an ideal remote meter reading. solution. It can be widely used in power meter reading, tap water meter reading, natural gas meter reading, transmission pipeline meter reading and other industrial applications.