Abstract
This article presents the results of the analysis of energy distribution of optical radiation emitted by electrical discharges in insulating liquids, such as synthetic ester, natural ester, and mineral oil. The measurements of optical radiation were carried out on a system of needle–needle type electrodes and on a system for surface discharges, which were immersed in brand new insulating liquids. Optical radiation was recorded using optical spectrophotometry method. On the basis of the obtained results, potential possibilities of using the analysis of the energy distribution of optical radiation as an additional descriptor for the recognition of individual sources of electric discharges were indicated. The results can also be used in the design of various types of detectors, as well as high-voltage diagnostic systems and arc protection systems.
Highlights
One of the characteristic features of electrical discharges is the emission to the space in which they occur, an electromagnetic wave with a very wide range
Based on most of these emitted ranges, diagnostic methods were developed, which enables the detection and location of the source of electrical discharges, which is a great achievement in the diagnostics of high-voltage electrical insulating devices [1–4]
The second second system system consisted consisted of of aa needle needle electrode, electrode, and and aa solid solid dielectric dielectric was was used used to to generate generate surface surface discharges. Both systems systems can can be be used used as as models models of of potential potential damage damage in in the the high high power power insulating insulating liquid liquid filled filled transformers, transformers, where where the the needle–needle needle–needle electrode electrode system system was was aa model model of of damage damage to to neighboring neighboring transformer transformer windings, windings, while the surface discharge system was a model of damage at the contact between the solid and liquid while the surface discharge system was a model of damage at the contact between the solid and dielectric
Summary
One of the characteristic features of electrical discharges is the emission to the space in which they occur, an electromagnetic wave with a very wide range Such typical ranges of emitted radiation include ionizing radiation, such as X-rays, optical radiation, acoustic emission, and radio wave emission. Based on most of these emitted ranges, diagnostic methods were developed, which enables the detection and location of the source of electrical discharges, which is a great achievement in the diagnostics of high-voltage electrical insulating devices [1–4]. These methods are constantly being improved and modified in terms of increasing their effectiveness and speed of operation. Examples of not fully understood areas are X-ray radiation and optical radiation emitted by electrical discharges [11–14]
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