A Method of Area Protection Partition Considering Communication Constraints

Abstract

The invention discloses an area protection partitioning algorithm giving consideration to communication constraint, and the algorithm faces the technical requirements of the area protection quick movement and reliability, gives consideration to the maximum jump number factors of substations and a main station, combines with the balance of the partitioned areas, and proposes an area protection mainstation selection model of a permutation and combination prioritizing method based on a Floyd shortest path algorithm. Furthermore, a substation dividing model is built according to the multifactor indexes affecting the communication time delay of area protection. In a dividing process of the substations, the algorithm gives consideration to the impact from an area protection communication network topological relation and length and bandwidth through combining with the technology of the graph theory, and achieves the reasonable distribution of the substations. N-1 channel faults in a rear preset region are caused for the partitioned area, and the impact from communication time delay in the communication tortuous process of the substations is analyzed, thereby achieving the further correction and supplement of the partitioning strategy. The algorithm effectively irons out the defects of a conventional method which needs a large amount of manual judgment operations and determination operations, achieves the partitioning area balance, and is smaller in communication time delay in a region.

Description

technical field [0001] The invention belongs to the field of relay protection in electric power systems, and is an area protection partition method considering communication constraints. Background technique [0002] Traditional backup protection uses local information to make tripping decisions, which has disadvantages such as difficulty in setting and coordination, and easy misoperation during large-scale power flow transfers. With the development of communication technology, regional protection, such as station area protection and wide area protection, which integrates multi-source information of regional power grid to make decisions, has been widely studied because it solves the shortcomings of traditional backup protection. This type of protection system has a common feature, that is, the wide-area power grid is reasonably divided into regions, and regional decision-making centers are set up in the sub-regions. The center collects multi-source information in the region ...

AI Technical Summary

Problems solved by technology

The partitioning method proposed by the present invention can overcome the shortcomings of traditional methods that require a large number of manual judgments and designations, realize the regional balance of partitions, and the communication delay in the region is relatively short

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