Substation area protection system and method based on existing protection logic quantity of transformer substation

Abstract

The invention belongs to the technical field of power system relay protection and relates to a substation area protection system and method based on existing protection logic quantity of a transformer substation. The substation area protection system concretely comprises a data acquisition module, a protection logic density function generating module, a protection logic judging and fault identifying module and a protection action module. When a fault occurs, the data acquisition module carries out data acquisition and logic quantity division, and then the protection logic density function generating module generates a logic density function applicable to the transformer substation according to characteristics of the logic quantity; and the protection logic judging and fault identifying module gives fault locations of each region by combining a logic density expected value according to calculation of the logic density function. The substation area protection system and method which are provided by the invention have the advantages that fault equipment can be effectively and rapidly identified, faults are selectively cleared, the problems that existing backup protection fixed value setting is difficult and operation time limit is difficult to match are solved, and protection performance is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to a substation domain protection system and method based on existing protection logic quantities of substations. Background technique [0002] The traditional protection of substations can only obtain local single-bay or local information. This inherent deficiency has caused the protection to fail to take into account selectivity, quickness and sensitivity at the same time, and it is increasingly unable to meet the higher requirements for protection of complex power grids. At the same time, with the continuous advancement of computer and communication technology, it has become possible to obtain station-wide information to realize station domain protection. Researching station domain protection is of great significance to ensure the safe operation of the power grid. [0003] At present, there are mainly two algorithms for station domain pr...

AI Technical Summary

Problems solved by technology

[0002] The traditional protection of substations can only obtain local single-bay or local information. This inherent deficiency has caused the protection to fail to take into account selectivity, quickness and sensitivity at the same time, and it is increasingly unable to meet the higher protection requirements of complex power grids.

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