Cable tunnel subsidiary facility fault automatic identification method and related device

Abstract

The invention discloses a cable tunnel subsidiary facility fault automatic identification method and a related device. The method comprises the following steps: carrying out anti-interference filtering processing on three-phase current of an ancillary facility power supply line to obtain fault signal characteristics; obtaining a first fault characteristic quantity through calculation according to the fault signal characteristics, and carrying out iteration processing on the low-frequency energy of the zero-sequence current of the subsidiary facility to obtain a second fault characteristic quantity; performing normalization processing on the first fault feature quantity and the second fault feature quantity to obtain a first fault feature vector and a second fault feature vector so as to form fault features; calculating a fault feature quantity sample according to the first fault feature vector and the second fault feature vector, and performing region division on the fault feature to obtain a fault feature region; and identifying the fault of the subsidiary facility according to the fault characteristic quantity sample and the fault characteristic area. The technical problems that in the prior art, faults of subsidiary facilities of a cable tunnel cannot be recognized in advance, and recognition is inconvenient are solved.

Description

technical field [0001] The present application relates to the field of electric power technology, and in particular to an automatic fault identification method and a related device for ancillary facilities of a cable tunnel. Background technique [0002] In order to effectively eliminate the safety risk of working in confined spaces, a large number of key auxiliary facilities such as lighting, fans, and water pumps are installed inside the cable tunnel. Such facilities are used frequently, but the internal environment of the tunnel is poor, with high humidity and strong electric field, and metal parts are prone to corrosion and rust, resulting in a high failure rate. Among the many fault categories of the auxiliary facilities of the cable tunnel, the faults of the power supply lines of the auxiliary facilities account for a large proportion. [0003] At present, there are mainly two forms of fault identification for the auxiliary facilities of the cable tunnel, one is the f...

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Problems solved by technology

[0004] This application provides an automatic fault identification method and related devices for cable tunnel ancillary facilities, which are used to solve the technical problem that the prior art cannot identify the faults of cable tunnel ancillary facilities in advance and the identification is inconvenient

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