Research On The Core Technology Of Intelligent Distribution Terminal With The Ability Of Ad Hoc Network For Distribution Line

The implementation premise of technology of distributed Ad hoc network is that smart distribution terminal units not only can realize the function of plug and play,but also can quickly adapt to the topology change because of the fault and remake of distribution line in distributed feeder automation system.Firstly,the traditional distribution terminal lacks the ability of self description,data transmission between distribution terminal and main station needs to check data point table resulted in distribution terminal can not achieve the function of plug and play.Secondly,the problem of the update and maintenance of network models between intelligent distributed FA system and main station is not yet solved.Finally,in the complex distribution network with multi connection switches,it is hard to achieve the optimal power supply recovery in the non fault area.In order to make the distribution terminal have the function of plug and play,this paper makes a research on the information modeling of distribution terminal based on the IEC61850 extension model,analyzes and selects the mapping method of information model of distribution terminal by referring to the modeling idea of IEC61850.The specific flow of the flexible configuration,plug and play of the terminals are given.Meanwhile,in order to solve the problem of the poor ability of topology operation and maintenance of distribution terminal in the intelligent distributed FA system,this paper introduces the working principle of distributed FA,analyzes the characteristics of network topology in the distributed FA system,summarizes the ways of topology acquisition.The scheme of topology operation and maintenance between FA and main station is first proposed.Finally,in order to solve the problem of poor fault recovery ability of distributed FA,two kinds of fault recovery algorithms are proposed in this paper,one is applied to cooperative distributed FA system,and the other is applied to agent distributed FA system.On the basis of previous research,the functions of terminal registration,automatic configuration,file transfer,data transmission and so on,are tested by running the plug-and-play test software on the computer,which validates the feasibility of realization scheme of the terminal self-description function proposed in this paper.Also,the cooperative and agent distributed FA fault network algorithm are verified by static simulation test,the results shows the effectiveness of the proposed algorithm.