The Influence of Metalic Protrusion and Surface Discharge Faults on Air Decomposition By-Products Under Different Electrode Materials

2018 IEEE Electrical Insulation Conference (EIC) Pub Date : 2018-06-01 DOI:10.1109/EIC.2018.8480891

H. Javed, Kang Li, Guoqiang Zhang, A. Plesca

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Abstract

Air decomposition products can be used to detect different partial discharge (PD) defects but the metal materials in a PD area can significantly affect air decomposition by-products characteristics. Disregarding the effect of metal materials on such characteristics inevitably result in certain errors when using them to diagnose the metallic protrusion and surface discharge defects. This paper investigates the influence regularity on different decomposition by-products of air such as Ozone, NOx, NO2and NO of the commonly metal materials used in high voltage equipments such as copper (Cu) and stainless steel(SS). Firstly, an experimental platform is established to simulate air decomposition by-products under a protrusion as well surface discharge defects and the influence regularities of Cu and SS on the concentration and generation rate of air by-products are obtained. Results show that Cu produces more air decomposition by-products as compared with SS in all defects under study. Secondly, an empirical mathematical relationship is proposed for rate of generation of air by-products under these partial discharge defects. This study leads to indirect way for online fault diagnostics in air.

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不同电极材料下金属突出和表面放电故障对空气分解副产物的影响

空气分解产物可用于检测不同的局部放电缺陷，但局部放电区域的金属材料会显著影响空气分解副产物的特性。忽略金属材料对这些特性的影响，在诊断金属突出和表面放电缺陷时必然会产生一定的误差。本文研究了高压设备常用金属材料铜(Cu)、不锈钢(SS)对空气中不同分解副产物臭氧、NOx、no2、NO的影响规律。首先，建立了突出物和表面放电缺陷下空气分解副产物的模拟实验平台，得到了Cu和SS对空气副产物浓度和生成速率的影响规律。结果表明，在所有缺陷中，Cu产生的空气分解副产物都比SS多。其次，提出了局部排放缺陷下空气副产物生成速率的经验数学关系式。该研究为空气故障在线诊断提供了一种间接途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2018 IEEE Electrical Insulation Conference (EIC)

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