Method and device for evaluating running state of zinc oxide arrester

Abstract

The invention discloses a method and a device for evaluating the running state of a zinc oxide arrester. The method comprises the following steps: acquiring a lightning stroke counter image and a leakage galvanometer image of a target zinc oxide arrester; preprocessing the lightning stroke counter image and the leakage galvanometer image to obtain a processed counter image and a processed galvanometer image; inputting the processed counter image into a pre-trained counter reading recognition network to obtain a corresponding counter reading; based on the numerical value change of the counter reading, inputting the processed galvanometer image into a pre-trained galvanometer reading identification network to obtain corresponding galvanometer reading information; and determining the operation state of the target zinc oxide arrester according to the counter reading and the galvanometer reading information. Therefore, the leakage current value and the action number value of the zinc oxide arrester can be recorded timely and accurately, and basic data can be accumulated for state maintenance of the whole life cycle of the zinc oxide arrester.

Description

technical field [0001] The invention relates to the technical field of arrester state monitoring, in particular to a method and device for evaluating the operating state of a zinc oxide arrester. Background technique [0002] Zinc oxide arresters are mainly used for the protection of substations and / or power plants. All zinc oxide surge arresters are widely used in power systems because of their fast action response, low residual voltage, no freewheeling and large flow rate. At present, the monitoring method of zinc oxide arrester is to install a leakage current meter on site for online monitoring, specifically by comparing the current leakage current value and the number of operations of the zinc oxide arrester with the previous leakage current value and number of operations. Determine whether the working state of the oxidation arrester is normal. Among them, the leakage current value is obtained through the real-time monitoring of the moving coil leakage current meter, a...

AI Technical Summary

Problems solved by technology

[0003] If the method of handwriting records is adopted, operation and maintenance personnel are required to inspect the zinc oxide arrester from a safe distance, and the dial of the moving coil ammeter is not fine enough, so it is difficult to clean and read the indication value of the ammeter and the count value of the counter, and then It is difficult to find the small change of the current when the zinc oxide arrester fails in the early stage

If the existing card machine is used to shoot, collect, identify and record readings, it can only record the leakage current value at the sampling moment, and cannot record and display the transient change of the leakage current of the zinc oxide arrester during lightning strikes in time, so that lightning strikes cannot be collected The impact of process impulse current changes on zinc oxide arresters is difficult to accumulate basic data for the condition-based maintenance of zinc oxide arresters in their entire life cycle

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