The Research And Realization Of Low-voltage Distribution Remote Monitoring System Based On Web

With the rapid development of the network technology and the promotion of enterprise information, the industry supervisory control system based on B/S (Browser/Server) model which combines the traditional remote monitoring system and Web technology attracts more and more attention on research and development. It is one of the developing directions of industry supervisory control field. The research of remote monitoring system is on the impact of decreasing the production costs of enterprises. This technology also has the extremely vital significance in raising the labor productivity and improving the comprehensive competition strength for enterprises.Firstly, the history and researching state of industry supervisory control system is introduced, also the structure of network remote monitoring system is analized. This paper puts forward the structure of remote monitoring system based on Web. Meanwhile, according to the research and discussion of various functions, structures and implement schemes on low-voltage distribution monitoring system in the past, the paper designs a system based on B/S model by comparing different software modes. Then, in terms of monitoring system integration, combined with practical needs of low-voltage distribution monitoring system, the thesis has discussed various kinds of key technology, including ASP.NET dynamic web page, Web-DB accessing, XML and XmlHttp, network security, etc. The system adopts Visual Basic 6.0 and SQL Server 2000 to develop field communication system, and adopts ASP.NET to develop Web server pages. At last, this system has not only realized remote information publishing based on data acquisition and monitoring function of field supervision system, but also given solutions to the key technologies and showed the feasibility of the system.This remote monitoring system of low-voltage distribution integrates field communication network and remote control network. Field communication network mainly realizes the functions of RS485 bus communication based on Modbus protocol, data acquisition, data parsing, data storage, external command receiving by field communication software module. It can provide the necessary servers for remote control network. Moreover, it has some assistant functions for field system administrator. Remote control network mainly realizes remote information publishing based on Web by Web server software module and the research of key technologies. Distal clients can realize some kinds of operations of data displaying, querying and controlling.The development of remote monitoring system based on Web has reached the initial purpose of the subject by integrating a practical project, and also made up for deficiency of research results on low-voltage distribution monitoring system in the past. The introduction of Web technology makes the low-voltage distribution monitoring system more integrated and informative, and further promotes the development of industry monitoring field.