Design of a new type of intelligent electricity meter reading system - News - Global IC Trade Starts Here.

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1 Introduction

At present, there are a variety of products for residential electricity meter reading. From the actual investment in recent years, the application of IC card meter and power line carrier collection accounted for a large proportion, but these products are saving energy. The actual effect of damage and improvement of the economic benefits of enterprises is not large, and it has not been widely used in the power supply industry.

The prepaid IC card meter can only solve the problem of electricity bill recovery in a single way. In comparison, the investment is large, the hidden danger is more, the maintenance is difficult, and the special person must be on duty to manage the electricity, because it does not have the function of monitoring the user's electricity consumption. Therefore, it is easy to decrypt theft or other stolen electricity, and it is difficult to detect. Prepaid itself is also prone to disputes with users, and many places have been explicitly restricted.

The low-voltage carrier centralized meter reading has a great advantage. It utilizes the existing low-voltage power line as a communication carrier to implement automatic computer meter reading, which not only saves a lot of work and expenses for laying lines and future maintenance lines, but also the line. Security is also naturally guaranteed, and the cost of running communication is low. Instead of replacing the old table, it can add a small sensor to the original table to complete the conversion and transmission of data, thus saving a lot of money for meter exchange.

However, its shortcomings are that the periodic and continuous interference signals on the grid line and the random burst and variability of the interference affect the stability of the data transmission, although the use of evasive interference and relay technology can improve some of the successful copying. The rate, but the technical solution of the product (telephone line + carrier communication) is fundamentally unable to adapt to various domestic power grid structures, and the real-time data of copying data is very low, it is difficult to stably ensure that the complete data of the station area is collected every day. Because the communication speed of the telephone line is low, and it is usually not always connected (a large amount of communication costs will occur), online monitoring and automatic alarm functions cannot be realized, so the actual use of the product is greatly limited, and the performance price ratio directly affects The promotion and application of the product.

GPRS (General Packet Radio Service), a general packet radio service, is a new type of packet data transmission service that is opened on the existing GSM network. It uses the concept of "packet-switched". A set of wireless transmission methods developed. GPRS uses packet switching technology, which allows multiple users to share certain fixed channel resources. GPRS is especially suitable for intermittent, bursty or frequent, small amounts of data transmission, as well as for occasional large data transfers. GPRS relative wired telephone also has the advantages of safe and reliable communication channel, high speed, no real-time online charging, low communication cost, wide popularization and convenient installation, especially the point-to-multipoint connectionless network service it provides. Meter reading project.

2 system structure and overall design

The basic system consists of a meter reading station, a data concentrator, a meter controller, a parameter setter, and management software. The overall structure of the system is shown in Figure 1.

The system divides it into several subsystems such as user increase and decrease management, measurement asset and measurement business management, power distribution equipment and safety management, electricity fee management, power monitoring, meter reading and control management, and centralized management of large users. The subsystems are organically connected to form a complete power management system.

The meter reading terminal intelligent power system software uses WIN2000/XP as the operating system development platform, VB as the development tool, and the SQL Server database for system development. The number of users that the software can manage is almost unlimited.

5 Conclusion

The innovation of this paper is: using GPRS network as the remote wireless data communication platform, which takes advantage of the general wireless packet service data transmission, and uses the bus technology or carrier communication technology to complete the data communication between the concentrator and the monitoring point to ensure the data transmission. The reliability, stability and real-time performance have changed the shortcomings of products such as IC card meters and power line carrier collection products in the past. They have made substantial breakthroughs in functions and uses, and can adapt to the power supply management in the modern power industry. Aspect of the demand.