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气体绝缘开关设备中环保型绝缘介质的交流击穿及分解产物检测特性

AC breakdown and decomposition products detection characteristics of eco-friendly insulating medium in gas insulated switchgear.

作者信息

Du Shuai, Cheng Xian, Ge Guowei, Li Tianyun, Guo Longyu, Liu Sai

机构信息

School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou, 450001, China.

出版信息

Sci Rep. 2024 Aug 22;14(1):19491. doi: 10.1038/s41598-024-70106-1.

DOI:10.1038/s41598-024-70106-1
PMID:39174597
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11341895/
Abstract

Gas Insulated Switchgear (GIS) was a crucial electrical equipment that provides the safety and security of power systems, and finding the eco-friendly alternatives of sulphur hexafluoride (SF6) as insulating medium in GIS has been an urgent demand in past decades. However, few studies reported the specific dielectric strength under various electrodes and partial discharge (PD) decomposition products detection of applying the eco-friendly gas in GIS. In this paper, the insulation properties among CFN/CO mixtures, dry air and CO were explored under the reduced-scale gas-insulated experimental device. The relationship between AC breakdown voltage and gas pressure was gained under the different electrodes and gap distances, and 0.6 MPa 7% CFN/93% CO, 0.9 MPa dry air, 0.9 MPa CO all possess the capacity to be the insulating medium in eco-friendly gas insulated switchgear. Furthermore, the partial discharge experimental was also carried out to realize the decomposition products detection of dry air, which designs three common defect types including metal protrusion defects, air gap defects, and metal contamination defects. The decomposition products detection result shows that the contains of CO, CO, and NO linearly increase with the increasing applied voltages and times, and the partial discharge defects are distinguished according to the ratios of c(CO + CO)/c(NO) and c(CO)/c(CO). The results can provide the basis for the further development of eco-friendly gas insulated switchgear.

摘要

气体绝缘开关设备（GIS）是保障电力系统安全的关键电气设备，在过去几十年里，寻找六氟化硫（SF6）在GIS中作为绝缘介质的环保替代品一直是迫切需求。然而，很少有研究报道在GIS中应用这种环保气体时，各种电极条件下的具体介电强度以及局部放电（PD）分解产物检测情况。本文在缩小尺寸的气体绝缘实验装置上，探究了CFN/CO混合气体、干燥空气和CO之间的绝缘性能。得出了不同电极和间隙距离下交流击穿电压与气体压力之间的关系，0.6MPa的7%CFN/93%CO、0.9MPa的干燥空气、0.9MPa的CO都有能力成为环保气体绝缘开关设备中的绝缘介质。此外，还进行了局部放电实验以实现对干燥空气分解产物的检测，设计了包括金属突出缺陷、气隙缺陷和金属污染缺陷三种常见缺陷类型。分解产物检测结果表明，CO、CO和NO的含量随施加电压和时间的增加呈线性增加，根据c(CO + CO)/c(NO)和c(CO)/c(CO)的比值区分局部放电缺陷。研究结果可为环保气体绝缘开关设备的进一步发展提供依据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/f2f0e7642079/41598_2024_70106_Fig13_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/4353e1d21522/41598_2024_70106_Fig2_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/9fbf83e5d4c7/41598_2024_70106_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/cd6c41e9b9a3/41598_2024_70106_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/c01b03574596/41598_2024_70106_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/f3eeeb7e229d/41598_2024_70106_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/a3caca280881/41598_2024_70106_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/5145d8fddd00/41598_2024_70106_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83e1/11341895/f2f0e7642079/41598_2024_70106_Fig13_HTML.jpg

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