Fault positioning method under encrypted communication of transformer substation

Abstract

The invention discloses a fault positioning method under encrypted communication of a transformer substation. The technical scheme adopted by the invention is as follows: after a communication initiator and a communication receiver establish an encryption channel by adopting an authentication encryption technology, replacing an encryption key for communication periodically after data with a fixed length is transmitted; meanwhile, monitoring abnormal information in the communication process in real time in an application layer; when any communication exception occurs, accurately describing exception information and encoding the exception information into an exception notification message, and immediately sending the exception notification message which can be captured by network message collection equipment in a plaintext mode; and when any one of the communication sender and the communication receiver monitors the communication abnormality of the specific abnormality level, automatically triggering log recording of the abnormal information. According to the method, the fault positioning capability under the communication abnormal condition in the authentication and encryption communication environment in the transformer substation is improved, and the difficulty of operation and maintenance management of communication in the transformer substation is reduced.

Description

technical field [0001] The invention belongs to the field of operation and maintenance of electric power systems, and relates to a method for locating abnormal communication problems under encrypted communication, in particular to a fault location method under encrypted communication for substations. Background technique [0002] With the extensive application of computer and communication technology in the power system, and the increasingly strengthened network security requirements, the communication security of substations has been paid more and more attention. Authentication and encryption communication technology is a common technical means to solve network communication security problems. In order to further improve the security of communication in substations, this technology has gradually been piloted and applied in substations. [0003] Although the application of authentication and encryption communication technology improves the communication security of the subst...

AI Technical Summary

Problems solved by technology

During the authentication process of both communication parties, there are usually multiple reasons that may lead to authentication failure, such as certificate expiration, certificate signature verification failure, and certificate has been revoked. It is also necessary to summon the stored information of the communication equipment itself to further locate the problem. The fault location requires high technical difficulty and the location process is complicated, which increases the difficulty of operation and maintenance management of substation communication.

Once encrypted communication technology is applied, the technical difficulty of communication fault location will be further increased due to the encryption of communication interaction messages, and the traditional communication fault location strategy is no longer feasible.

Images