Abstract:In order to improve the reliability of distribution network supply, this paper studies the construction plan of distribution automation in central city in accordance with the technical standards and requirements of smart grid planning and construction for distribution network and distribution automation. This paper introduces in detail the features and applications of the communication system of distribution automation, including 4G dual card communication, plastic optical fiber communication and quartz optical fiber communication. It flexibly configures the communication network structure according to the functions of distribution automation system to provide a reasonable and efficient communication system. Then, based on the realization function of intelligent distribution automation equipment, combined with intelligent vacuum circuit breaker and fault location equipment, cost-effective solutions can isolate and locate faults so as to greatly shorten the power failure time and improve power supply reliability. In the end, the author mainly analyzes and researches the design of the main system of distribution automation, including its automation management platform, function, networking mode, feeder automation and master station system expansion. And the simple ring network structure of 10kV feeder "hand pull" is used as an example to demonstrate the automation of feeder line.