Study Of Distribution Automation In Data Communication Systems

Communication is one of the most important part in Distribution Automation System(DAS), and is the necessary means for the Distribution Networks Control Center to implement the information data's transmission, collection and telecontrol tasks to the remote-terminal, and have an important influence on the constitution and implementation of functions in DAS. In DAS, we can select many types of communication method such as optic fiber, radio, wire and cable, power line carrier etc. It is impossible to use single communication method in the system because of the characteristics and requirements of the information data in the DAS.Besides, different selection and scheme design of communication methods make a considerable influence on real-time properties, reliability and availability of DAS, and the expense for construction and usage of system are different too. Based on the research on the principle and feasibility of some usually used data communication method and considering domestic practical feature and requirement of DAS in nowadays, this thesis presents a communication system scheme for urban and suburb distribution automation. The whole scheme adopts multi-class distributed structure and complexes several communication method to meet information transmission requirements in DAS. As far as communication method, we study emphatically on their communication principle, technical features, configuration mode and properties and so on. At last, the thesis is simply describe the data transmission protocol in DAS. The whole scheme has some advanced and practical suggestion to the renovation of urban power networks which are being carried out in current.