Influence Estimation of the Voltage Value on the Measurement Results for the Optical Radiation Generated by Partial Discharges on Bushing Isolator

Abstract

The subject area of the paper concerns determination of possibility and application scope suggestion for the optical spectrophotometry method in the linear isolators diagnosis. Measurements results of the optical radiation emitted by partial discharges generated on a model of bushing isolator, which was placed in the air, are presented in the paper. Recording was done by use of a spectrophotometer that enabled for measurement of optical radiation in the range from 250 to 1700 nm. The main aim of laboratory research works performed was to estimate the influence of the supply voltage value changes in range from 0 to 60 kV on the intensity and character of the optical radiation spectrum emitted by surface partial discharges occurring on the ceramic insulating surface of the bushing isolator. In the scope of research works, analysis of voltage value changes influence on the gathered spectra was performed while its accretion and decrease was investigated. Furthermore, the measurements and analysis performed enclose the influence estimation of the time, when the voltage was attached to the high voltage electrode, on the proceeding of the optical phenomena connected with generation of surface partial discharges. In addition a comparative analysis of measurements results gathered for two designed and implemented models of bushing insulators, which differ in geometric dimensions, was performed.

Solving a Set of Spherical Equations for Localization of Partial Discharges by Acoustic Emission Method

“…percentage error value of PD source location in the direction of OX, OY andOZ axis designated for dimensions of the tank does not exceed 3%, which indicated a very high accuracy of the proposed modied triangulation method; received maximum error value under 2.63 cm is similar to location error values obtained by authors using other means [22], where they indicate, respectively, ≤ 3.36 cm and ≤ 3.14 cm for a measuring tank of similar dimensions.…”

“…(19) the following designations were introduced: α, β (20) and (21). Further, according to them equation (22) was written…”

Measurement of optical signals emitted by surface discharges on bushing and post insulator

“…Detailed description of the testing system and the models of insulators being used were shown in the study [7].…”

“…The methods and techniques used for detecting, locating and measuring the PD intensity have long been refined and developed in many research centers in the world [1][2][3][4][5][6][7][8][9][10][11][12][13]. Conventional methods [10] (electric, HF/VHF, UHF) and non-destructive alternative methods, such as: optical [1,2,14], mechanical (acoustic [11,[15][16][17][18][19] and optoacoustic methods [20]), as well as chemical methods are common nowadays.…”

Application of a mobile system in diagnostics of power capacitors using the acoustic emission method

“…Accordingly, the following diagnostic methods for insulating systems have been developed: invasive and non-invasive electrical methods [3][4][5][6][7][8][9][10][11] ; gas chromatography; wideband methods: UHF (ultra high frequency) or VHF (very high frequency) [12][13][14] ; the acoustic emission (AE) method [15][16][17][18][19][20][21][22][23][24][25] ; and optical spectrophotometry [26][27][28][29][30] . The subject area of this paper covers improving the AE method applications.…”