First, centralized meter reading system power marketing management status
With the development of social market economy and the rapid expansion of China's power grid scale, the traditional manual meter reading and manual settlement methods can no longer meet the actual needs of power marketing system in the new period. In the centralized meter reading system, advanced technologies such as modern communication technology and computer automation technology are integrated. The application of these technologies can effectively improve the accuracy and efficiency of centralized meter reading system, which is also a very important content in the development of smart grid. Through the application of centralized meter reading, many functions can be realized on the basis of traditional meters, which can not only realize the real-time collection of users' electricity, but also effectively reduce the loss of meters, not only save a lot of human capital, but also effectively improve the accuracy of meter reading. In the centralized meter reading system, the most basic equipment is the smart meter, which can effectively realize the two-way communication between users and enterprises, which not only facilitates the management of users, but also helps power enterprises to accurately analyze users' electricity demand.
Second, the composition of centralized meter reading system
Centralized meter reading system usually consists of several parts, namely communication system, hardware facilities and software platform. Although the domestic centralized meter reading system is still in the development stage, the compatibility, maintainability and expansibility of each part are good. Due to these advantages, the optimization and upgrading of each part of the system is very convenient, which is conducive to the improvement of its performance.
1. Smart meter
Smart meter is the main hardware foundation to realize centralized meter reading and smart grid. Smart grid is equivalent to Internet architecture, in which: through smart meters, information interaction between users and enterprises can be realized, and information such as overload warning, power quality, power resumption notice, power outage notice, user electricity consumption, electricity bill and so on can be fed back to enterprises, and some important power information such as power, load, harmonic detection related data and line loss data can also be collected. After these data are fed back to the power enterprises, it will help the enterprises to fully understand the overall electricity consumption of users. If the smart meter is applied to industrial measurement, it also has some special functions, such as function overrun alarm, power overrun alarm, variable loss measurement, harmonic measurement and so on. , and you can also record special events when you encounter special events; When smart meters are applied to transformers, they can realize the functions of line loss verification, three-phase unbalance test, power failure acquisition and so on.
2. Software platform
The software part of centralized meter reading system is mainly composed of application software system and database system, in which the database system mainly realizes the functions of data acquisition, exchange and analysis; In the process of operation, the application software system mainly realizes the support function of daily management and operation. At present, ActiveX is a commonly used software in centralized meter reading system in China. Through this software platform, the effective docking between power marketing system and power supply enterprises can be effectively realized. The most commonly used technology in database system is customer information control system, through which the resources of the main database can be referenced and accessed, and then used by the operating system. In addition, there is a hardware support platform to support the operation and maintenance of hardware facilities. The hardware support platform mainly includes remote download technology and curing core technology. Different from the traditional maintenance management, which needs to waste time and human resources on site, the centralized meter reading system software has the functions of expansion and remote upgrade, which can effectively reduce the labor intensity of staff and effectively improve the overall work efficiency.
3. Data transmission system
The key content of remote centralized meter reading system is data transmission communication system, which can realize information transmission between control center and terminal hardware. In the communication process, the commonly used communication technologies are: wireless network technology, optical fiber communication technology, power carrier technology and so on. Among them, the power carrier communication technology realizes the conversion between digital signals and analog signals on the basis of existing power lines by means of carrier crossing. The remarkable feature of this communication method is that it can effectively save transmission cost by using power line as transmission medium in the communication process, and there is no need to set up additional transmission lines, but it also has its own shortcomings, that is, it is easily blocked by transformer, which affects its communication quality; Optical fiber communication technology mainly uses optical fiber lines to transmit information. In this communication mode, information can be transmitted in both directions, but the cost is high in the construction of distribution network communication system. In the wireless network communication mode, information transmission is mainly realized by means of wireless signal networks and base stations provided by mobile communication enterprises. At present, the most commonly used communication methods are CDMA and GPRS. In the communication process, there is no need for equipment construction and maintenance, especially in complex terrain conditions, which is very convenient to apply. At present, 3G technology, known as the third generation mobile communication technology, is more stable and powerful than CDMA and GPRS networks, and the data transmission rate will be faster. At present, the wireless ports related to centralized meter reading system equipment have reserved the ports related to 3G wireless network upgrade space, which can effectively realize the upgrade and expansion of the system.
Three. Concluding remarks
Centralized meter reading system effectively realizes the standardization and normalization of electric energy measurement, greatly improves the efficiency of meter reading, saves manpower, material resources and financial costs for related power enterprises, and realizes the remarkable improvement of economic benefits of power enterprises. At the same time, the improvement of electric energy measurement and management level meets the needs of power users under the new situation, provides high-quality services, makes power enterprises more adapt to market-oriented development, and is conducive to establishing a good corporate image.
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