Design Of Smart Distribution Terminal Communication System

With the developing of modern computer technology and communication technology, comby power distribution net with multi distribution passes has come into being. The running mode of the new distribution net is so flexible that it is hard to hard it only by the dispatchers'experiences. So artificial intelligence must be developed imminently to corporate, even to replace dispatchers to do the optimal dispatch in time. Artificial intelligence dispatch can also ensure safe run other net, reduce the run charge, increase economic benefit.improve the net'S reliability and exert the power distribution net's potential furthest. It can promote this direction to develop continuously and steadily.Distribution Automation is an important part of power system automation, and, communication is more important. As the different parts of the development of distribution Automation, Distribution network around the terminal means of communication also vary, which bring China's largest integrated distribution network to the reality of the difficulties.With the developing of electronics, computer, network, communication and embedded system and the construction of city and county power distribution net, some intelligent terminals appear. These terminals have abundant functions, cheap and high quality communication, more reliability and stabilization compared with old ones. Some terminals have already control functions. Combine the distribution actuality,with it's requirement, a new type of terminal that is based on embedded system and has multi communication channels is designed in this paper. The designed terminal Can collect too many electric parameters such as voltage RMS, current RMS, digital waveform of voltage and current, active power, reactive power, apparent power frequency and current temperature etc. It also has three pulse data channels, eight analog data channels. The terminal has good quality and low Cost communication channels such as Ethernet communication, GPRS, expect traditional RS232 and RS485.In the paper, the communication module of distribution terminal is designed emphatically, which meet the demands of communication network in different areas. The distribution terminal communication includes RS-485, RS232, CAN, Ethernet, GPRS communication interfaces, and it can accord with several communication protocols, so it has broad applicability.