State Grid Standard Ad Hoc Network Wireless Meter Reading System Scheme
chrispeng [ad_1]
1. Introduction to the system
SR201003 State Grid Standard Ad Hoc Network Wireless Meter Reading System Sang Rui Wireless Ad Hoc Network Low Voltage Centralized Meter Reading System is a new type of centralized meter reading system developed and produced in accordance with the State Grid Corporation’s Q/GDW-2009 enterprise standard. This system is a remote meter reading system product developed on the basis of Sunray’s new generation of self-organizing wireless communication technology-SRWF-SunRayNet. It is currently the most appropriate solution for low-voltage centralized copying of residential users.
2. System composition and deployment
2.1. This system is composed of DJGJ22-SR201003 type concentrator and DCJL12-SR201003 type collector. The main station-is the main station of the State Grid Corporation and various provincial companies. The main station and the concentrator are connected by GPRS wirelessly through the public network. The concentrator and the collector are the wireless ad hoc network system, and the collector and the electricity meter are connected. Use RS-485 local bus.
2.2, system composition diagram
2.3.
The electricity consumption information collection system of electric power users realizes the collection of electricity consumption information of all users. It has a wide range of users, different power consumption environments, different remote channels that can be reached, and different types of terminals installed. Although the objects and channels are different, according to the principles of intensive, unified, standardized and the realization of marketing business functions, a unified power consumption information collection platform should be built to achieve full coverage of power users on one platform.
2.4
2.5,
3. System function introduction and main component parameters
This product uses the SRWF-SunRayNet self-organizing network wireless communication module installed in the communication warehouse to realize the gapless communication between the nodes (collectors) of the collection system in the community and the central node (concentrator), and between the devices in the network. The communication network is automatically formed, and the built network has a self-repair function without manual intervention.
3.1. Collection function:
The following data can be classified and stored: each electric energy meter has at least 31 daily zero points (zero point of the next day) to freeze electric energy data, and 12 month end zero points (zero point of the 1st day of each month) to freeze electric energy data. Support multi-rate electric energy meter, frozen data includes: total, sharp, peak, flat and valley.
3.2. System composition and main component parameters
①DJGJ22-SR201003 type concentrator
The DJGJ22-SR201003 type concentrator is a meter reading terminal for residential users’ wireless low-voltage power centralized reading system that meets the Q/GDW—2009 standard of the State Grid Corporation of China. The DJGJ22-SR201003 type concentrator adopts the most advanced 32-bit industrial-grade ARM 9 processor from Atmel of the United States today, uses an embedded Linux operating system and a database management system, and uses a German SIEMENS (Siemens) GPRS remote communication unit. The function supports 1024 measuring points, each measuring point has accumulated 31 daily zero points (zero point of the next day) to freeze electric energy data, accumulated 12 month end zero points (zero point of the 1st day of each month) frozen electric energy data, and 10 key users for 10 days The 24 hourly-point energy data. After the power supply of the concentrator is interrupted, the data and clock can be maintained for one month. When the power is restored, the saved data will not be lost, and the internal clock will operate normally. The liquid crystal display adopts 160×160 dot matrix, and the window size adopts 60mm×60mm, which can display the current electricity consumption, meter reading data, operating parameters, maintenance information, etc.
②DCJL12-SR201003 type collector
The DCJL12-SR201003 wireless collector is a meter reading terminal for residential users’ wireless low-voltage power centralized reading system that complies with the State Grid Corporation’s Q/GDW XXX—2009 standard. The product is suitable for the centralized meter reading system of low-voltage power residential users. The product is equipped with a self-organizing network wireless module, which forms a centralized reading system with DJGJ22-SR2010003 concentrator in a wireless manner. The communication between the concentrator and the terminal complies with the frame structure of Q/GDW376.2-2009, the meter reading interface is a RS-485 bus interface, and the standard reading and receiving 32 only comply with the DL/T645-1997 or DL/T645-2007 communication protocol Resident electricity meter. The following data can be classified and stored: each electric energy meter has at least 31 daily zero points (zero point of the next day) to freeze electric energy data, and 12 month end zero points (zero point of the 1st day of each month) to freeze electric energy data. Support multi-rate electric energy meter, frozen data includes: total, sharp, peak, flat and valley.
4. System features and advantages
1. The success rate of meter reading is high. The success rate of one meter reading is over 99%, and the success rate of supplementary reading is 100%.
2. Easy to install and maintain. Concentrator, collector, radio meter, automatically complete networking, automatically provide routing, and automatically realize path repair management.
3. Good real-time performance. Copying first-level nodes on site, the response time is 0.7s, and copying first-level nodes in the background, the response speed is about 5s.
4. High security. The point-to-point communication within the network adopts internal data encryption to ensure communication security.
5. The network coverage is large. Provide 16 levels of routing, long distance.
6. Frequency hopping anti-interference. 8-channel automatic frequency hopping, hardware watchdog, wide temperature crystal oscillator, strong anti-interference ability.
7. The effective data transfer rate is high. The effective data length that can be transmitted in a single packet data frame reaches 1200 bits.
8. The network is stable and intelligent. The self-organizing network forms an ultra-stable network structure, and any node can perform self-path repair.
9. Large network capacity. The network can accommodate 3000 network nodes.
10. Free frequency band. 470MHz free frequency band, with good communication distance and penetration ability.
11. According to the field application, three application methods can be composed: concentrator+collector+485 meter, concentrator+collector+485 meter+wireless meter, concentrator+wireless meter. It can be applied to various environments in the current collection area.
[ad_2]
