Metal oxide arrester surface pollution online detection method

Abstract

The invention discloses a metal oxide arrester surface pollution online detection method. The method comprises the following steps: S1, acquiring full leakage current it and input voltage U from metal oxide arresters with different surface pollution levels; according to the metal oxide arrester surface pollution online detection method, only the total leakage current and voltage of the metal oxide arrester in operation need to be collected, and the total leakage current is decomposed and subjected to feature extraction through the algorithm provided by the invention; and finally, surface pollution degree classification is performed on the lightning arrester corresponding to the total leakage current through a Gaussian Bayesian classifier so that the surface pollution condition of the metal oxide lightning arrester can be mastered very conveniently, the service life of the lightning arrester is greatly prolonged, and the operation reliability of a power system is greatly improved. Meanwhile, on-line detection of the lightning arrester can eliminate the power failure condition caused by power failure maintenance, so that the loading and unloading process of the lightning arrester is avoided, and the convenience of the detection process is improved.

Description

technical field [0001] The invention relates to the technical field of lightning arrester detection, in particular to an online detection method for surface pollution of metal oxide lightning arresters. Background technique [0002] Reliable, uninterrupted power generation and transmission is the most important demand for the development of the global society. Usually, in the case of lightning weather or switching surge voltage, the insulation system of power system equipment will bear huge pressure, which may cause the insulation equipment to explode or catastrophic failure. The metal oxide arrester is an insulating device that protects power system equipment from lightning and switching surges by absorbing excess energy similar to overvoltage and reducing its magnitude below the safety threshold. Therefore, the metal oxide arrester The role in the power system insulation system is crucial. [0003] Metal oxide surge arresters can be regarded as insulators under normal op...

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides an online detection method for surface pollution of metal oxide arresters, which solves the problem that in the prior art, when detecting metal oxide arresters, the detection process is too cumbersome and sometimes requires The metal oxide arrester is disassembled and inspected, the inspection cost is relatively high, and the problem that online inspection cannot be realized

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