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With the purpose of performing field verification on 1100kv GIS UHF partial discharge sensors, the author utilized the steep pulse signal injection method and the transfer characteristic experimental method to perform this study. The results indicate that both of the methods have feasibility for UHF partial discharge internal sensor field verification, and have very high relevance. The study obtained...
The paper establishes a defect simulation platform for multi-sensor 1100kVGIS, simulating four types of typical partial discharge defects within the GIS capsule and obtaining detection spectra of different types of defects as well as detection signal spectra of diversified position sensors. The attenuation characteristics of different position sensors were acquired under diversified voltage signals...
In this paper, in order to represent three kinds of typical partial discharge respectively happened in dielectric, out of dielectric and surface of dielectric, five kinds of typical partial discharge models, which included needle to plate, needle to needle, plate to plate, surface and air void, were designed and manufactured with aluminum. Based on the designed models, an experiment system of ultra...
The physical meanings and definition of dielectric loss factor-tandelta was analyzed under the harmonic condition. Voltage and current were defined as vectors in normed linear space. By using the characteristic of orthogonal vector in inner product space, the current signal was decomposed to active and reactive currents. Subsequently, a novel digital algorithm of tandelta measurement, which was defined...
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