Analysis of the influence of a conductive particle on the surface flashover characteristics of epoxy dielectric in atmospheric air

Lim, Dong Young; Jee, Seung Wook; Bae, Sungwoo; Choi, Young Kil

doi:10.1016/j.elstat.2019.04.005

Cited by 7 publications

(2 citation statements)

References 33 publications

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“…The air region where ionization processes occur is called the region of space charges. McMILLAN (1932) andLIM et al (2019) present theories of formation of the regions of space charges and the corona effect in devices subjected to high alternating voltage (AC).…”

Section: Theorymentioning

confidence: 99%

High Sensitivity Envelope Detector Assisted by Microwave Photonics

Gonçalves¹,

Ivo²,

Coutinho³

2022

Smart Systems: Theory and Advances

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Theory and Advances is licensed under CC BY 4.0.This license requires that reuses give credit to the creator. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, even for commercial purposes.The content of the work and its data in its form, correctness and reliability are the sole responsibility of the authors, and do not represent the official position of Amplla Publishing. Downloading and sharing of the work is permitted as long as credit is given to the authors. All rights to this edition were ceded to Editora Amplla.

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Section: Theorymentioning

confidence: 99%

High Sensitivity Envelope Detector Assisted by Microwave Photonics

Gonçalves¹,

Ivo²,

Coutinho³

2022

Smart Systems: Theory and Advances

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“…Niemeyer derived an qualitative stepped-leader model for the discharge propagation along an insulator surface in compressed SF6 [11]. Lim analyzed the influence of the distance between conductive particle and triple-junction on the flashover voltage of an epoxy surface and proposed a model to present the effect of positive space charge [12]. Qi studied the PD feature of a conductive particle-contaminated GIS insulator under gradually-rising voltages and found different discharge modes under various voltages [13].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the Partial Discharge in the Development of Conductive Particle-Initiated Flashover of a GIS Insulator

Zhao

et al. 2020

Energies

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Conductive particles are one of the most important defects which can greatly degrade the performance of gas-insulated metal-enclosed switchgear (GIS). Many efforts have been made to clarify the influence on the withstand voltage, understand the flashover mechanism, and build a comprehensive model to describe the particle-initiated flashover. In this study, a partial discharge (PD) signal detected through a photomultiplier (PMT) and recorded by a high-speed data acquisition (DAQ) system was used to analyze the discharge development of a conductive particle-contaminated GIS insulator under constant high AC voltage. An additional PMT was used as a reference to eliminate the dark count of the PMT and the data collection method of a DAQ system was optimized to capture the pulse waveform of each PD to obtain detailed physical information. Spectra of the PD pulse amplitude over pulse width, PD counts within various amplitude ranges over time and phase resolved partial discharge (PRPD) patterns of the PDs in different stages are obtained through the captured PD waveforms. Characteristics of the PDs from the application of the high AC voltage up to the flashover of the insulator were then analyzed, and it was found that the features of the PDs in the near-flashover stage were significantly different to the previous stages.

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