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Topology Adaptive Distributed Based On IEC 61850 Research On Feeder Automation

Posted on:2021-04-20Degree:MasterType:Thesis
Country:ChinaCandidate:Z H WangFull Text:PDF
GTID:2392330605467818Subject:Engineering
Abstract/Summary:PDF Full Text Request
In recent years,as users have higher and higher requirements for power supply reliability and large amounts of distributed energy access,the operation mode of the distribution network has become more and more complicated,and the use of traditional protection and control technologies has been unable to adapt to the increasing Power supply reliability requirements.Distributed control technology uses decentralized and distributed measurement information to improve control performance,at the same time,it can complete the control without relying on the master station,avoiding the shortcomings of long delay of centralized communication and data processing of the master station.The distribution line has a multi-segment and multi-connection structure,and its real-time topology will change with the optimization of operation mode and fault handling during actual operation.Some distributed control strategies require real-time topology as the basis for decision-making.Therefore,distributed control requires Solve the problem of dynamic identification and adaptation of topology.For distributed control applications,it is necessary to properly express the feeder topology,properly configure the local topology information on the intelligent terminal,and run the dynamic search and update topology in real time to solve the topology adaptation problem.In response to the above problems,this paper first analyzes the working principle and characteristics of three different modes of feeder automation.This paper summarizes the application of IEC 61850 to feeder automation,and determines the idea of implementing dynamic topology recognition based on IEC 61850.By analyzing the distribution line structure and the topology requirements of distributed feeder automation,using the IEC 61850 modeling method,a new unit topology logical node and a topology slice logical node were created,and a logical node was used to express the local topology of the distribution line and its configuration method.This method does not need to name the conductors of each section of the line,which simplifies the description of the topology and has fewer engineering application configurations.Based on the configuration of new topological logical nodes,a real-time topology search and recognition method based on point-to-point communication is proposed.In this method,the communication parameters of adjacent intelligent terminals are configured on the terminal,and the topology logical node information of the terminal configuration is exchanged with each other through a point-to-point communication method.Each terminal expresses local topology information through the cooperation of unit topology nodes and topology slice nodes.Using topology slice information and current switch equipment status information configured by the power distribution terminal,real-time topology identification of feeders can be realized based on depth-first search.During the search,the unit topology node is searched first in this topology slice.When the search reaches the topological boundary,the topology information of adjacent terminals is obtained through communication,and the unit topology node search across the topology slice is performed.The real-time topology of the line realizes the adaptation of the distributed control application to the dynamic change of the distribution network topology.The calculation example verifies the feasibility of the method.Using logical nodes to express the distribution line topology,the topology identification and other functions of the distribution terminal can be configured and accessed in the same way,and the engineering configuration and use consistency are better.The real-time topology recognition method based on topological logic nodes can better support the application of distributed feeder automation,and can be further applied to other distributed control applications to meet the operation control requirements of the distribution network.
Keywords/Search Tags:distribution automation, distributed feeder automation, topology recognition, IEC 61850
PDF Full Text Request
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