Wulian County Distribution Automation System Research And Design

Distribution system is an important part that faces the masses of customers directly in power system . As the original distribution system of Wulian county is low in automatic degree , it can' t meet the demand for electricity utilization of the fast development of the economy .The reconstruction of distribution system of Wulian county can improve power supply reliability and quality.Firstly, the contents of distribution automation and current situation of the development of domestic and international distribution automation are presented in this thesis. The issues that exist in the process of implementation of distribution automation are pointed out. Several application modes are also discussed. Aiming to the current situation of distribution network of Wulian county, the idea that plan of distribution system goes with primary system in step is put forward, that can create good platform for development of system in the future.Secondly, all kinds of modes of feeder distribution automation are analyzed and compared, and their ranges are presented. According to the characteristics of power demand in Wulian county, centralized mode of feeder automation is adopted in distribution automation.The existing communication modes are compared technically and economically. Considering requirement of communication in distribution automation, the network structure of communication relevant to the centralized mode of feeder automation is put forward.At the end of this paper, according to the design principle of standardization, opening,security and easy maintenance and considering pratical conditions of distribution system of Wulian county, a global design of distribution system is given. The entire system consists of some subsystem, including SCADA system, feeder automation system, distribution substation/switching station monitoring system,, distribution working manage system and electricity-metering system. Distribution automation system can achieve the function that supervising and controlling distribution system, fault detection and sevice restoration automatically, can utilize all kinds of information to achieve optimum management. At the same time, the design of master station and terminal are also deeply studied. The scheme of communication system and feeder automation in Wulian county is designed.