Abstract
Distributed control has good real-time performance and can better meet the control requirements of active distribution networks with a large number of distributed generations. Some distributed applications require real-time feeder topology to achieve control. In this paper, the demand for distributed control applications for feeder real-time topology is analyzed. Based on IEC 61850 modeling method, a new cell topology logic node and a new topology slice node are built to express feeder topology. Using the topology information of smart terminal unit (STU) configuration and the current status information of switchgear, based on the depth-first search, the feeder real-time topology identification can be realized, which meets the application requirements of distributed control. The study case verified the effectiveness of the method.
Highlights
Distributed control has good real-time performance and can better meet the control requirements of active distribution networks with a large number of distributed generations
Distributed feeder automation (FA) does not rely on the master station, it only needs the communication between the distribution smart terminal unit (STU) to make decisions, so it can effectively improve the processing speed of distribution network fault. e implementation of the distributed FA function needs to know the current real-time topology of the feeder [3, 4], especially the location of the tie switch when the power supply is restored
Zhu’ team describes the distribution network topology based on the Process and Line model of IEC 61850 system configuration language (SCL) and proposes a distributed topology processing method based on Graph Segmentation and realizes the topology identification of distribution network by communication of STUs [15, 16]. e topology description method based on SCL needs to generate a topology configuration file and store it in the STUs. e real-time topology is obtained by transferring and exchanging the topology configuration file
Summary
Distributed control has good real-time performance and can better meet the control requirements of active distribution networks with a large number of distributed generations. For distributed applications that need to use feeders or local information to make decisions, a real-time feeder topology is needed to achieve control. When the topology of distribution lines changes, the complete topology of feeders will be updated in the master station In this way, the topology information is complete, but it can only be used for centralized processing applications [11]. In order to meet the needs of distributed control topology information, the research of real-time distribution line topology identification has been carried out in the literature. Based on the logical nodes, the topology recognition algorithm is studied to complete the topology search of feeders to meet the application requirements of distributed control applications. Compared with the method of describing distribution network topology based on SCL, the method of describing topology information based on logical nodes, and the method of configuration and acquisition of local topology are consistent with other functional logical nodes, which is more convenient for application and promotion of distributed control application
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