Research On Distributed Feeder Automation Fault Recovery Technology

With the development of society and the improvement of people's living standard,the requirements for power supply quality and reduce short interruption(power failure within three minutes)from users become more and more stringent.The traditional feeder automation is difficult to adapt the complex distribution line and rapid fault handling.so,the smart terminal units are used to exchange measurement information,rapid realization of distributed feeder automation fault location and restoration,has become the key technology in current research.In this paper,distributed feeder automation fault recovery technology is researched,around the fault recovery problem,study the fundamental of distributed control and automatic identification technique of feeder topology,with efforts to solve the smart terminal unit(STU)between the coordinated control theory.Then research the typical single contact lines and the multi contact distribution lines.A distributed fault recovery method based on multi STU and maximum range power supply restoration method with insufficient spare capacity are proposedThe main work of this paper are as follows:(1)The basic concepts of distributed control are analyzed,the control task and the control domain were summarized.The characteristics and appropriate of different control tasks' starting mode and operation mode are analyzed.(2)The method of automatic identification of feeder topology is proposed,which is beneficial to realize peer to peer communication between terminals and direct interoperability between terminal and master station.(3)The distributed fault recovery method for single contact feeders is improved,and further the contact line power grid,the maximum load recovery,the maximum range of power recovery,recovery time is short,lack of spare capacity of the power recovery method of multi-objective optimization method is proposed to restore the two contact,distributed power supply based on greedy algorithm,and test verification was carried out.The main achievements of this paper are as follows:(1)Through the research of distributed feeder automation fault recovery technology,the distributed fault feeder single contact recovery method were reasonably optimized,when the fault occurs spontaneously in positioning,fault isolation and supply restoration and a series of operations,the experiment is carried out.(2)Through the analysis of the greedy algorithm and summary recovery method two contact distributed maximum range power supply based on greedy algorithm is proposed to complete,non fault zone supply recovery in the shortest time,and the experiments are carried out.