Trending of SF6 Decomposition By-Products Characteristics Under Artificially Induced PD in GIS

Ammar Salah Mahdi, Z. Abdul-Malek, A. Naderipour, S. Ishak, Mohd Nur Khaidir Bin Hussein
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引用次数: 1

Abstract

This work aims to study the decomposition of Sulfur Hexafluoride (SF6) and describe the energy of partial discharge (PD). It is also aimed to identify feature or key gases generated under the activity of discharge induced by artificially introduced insulation defects. Different configurations of four types of defects were used in the discharge chamber, and the analysis of decomposition components were employed to detect the PD. The variation of decomposition by-products along the stress duration under different levels of PD energy were studied, and key gases generated under each type of defect have been proposed. A series of experiments have been conducted using experimental platform including testing equipment, discharge chamber and PD measurement equipment. The applied voltage was gradually increased beyond the PD inception voltage after each sampling throughout the energisation duration to study the correlation of discharge energy with concentration and amount of generated products. Decomposition by-products, detected using Fourier transform infrared spectroscopy (FTIR), have been analyzed to reveal the relationship with the energy of PD. Results have shown that products such as SO2F2, SOF2, CO2 and C3F8 were generated by some defect configurations at different rates, and sulfur-containing products are more stable and correlated with the PD level. Analyses of the characteristics of decomposition by-products can be used to effectively assess the condition of SF6 gas insulated equipment (GIE).
GIS人工诱导PD下SF6分解副产物特征变化趋势
本工作旨在研究六氟化硫(SF6)的分解,并描述局部放电(PD)的能量。它还旨在识别由人为引入的绝缘缺陷引起的放电活动下产生的特征或关键气体。在放电室中采用四种不同形态的缺陷,并通过分解成分分析来检测PD。研究了在不同PD能量水平下,分解副产物随应力持续时间的变化规律,提出了每种缺陷下产生的关键气体。利用测试设备、放电室和PD测量设备等实验平台进行了一系列实验。在整个通电时间内,每次采样后的外加电压逐渐增加,超过PD起始电压,研究放电能量与浓度和生成产物数量的相关性。利用傅里叶变换红外光谱(FTIR)对分解副产物进行了分析,揭示了分解副产物与PD能量的关系。结果表明,不同缺陷构型以不同速率生成SO2F2、SOF2、CO2和C3F8等产物,含硫产物更为稳定,且与PD水平相关。分析分解副产物的特性,可以有效地评估SF6气体绝缘设备(GIE)的状态。
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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