| 气体介质影响下梅花触头载流磨损特性与电接触寿命预测 |
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| 作者姓名： | 林镕兴 王扬程 陈志鹏 关向雨 刘江 蔡开明 |
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| 作者单位： | 福州大学电气工程与自动化学院,福州大学电气工程与自动化学院,福州大学电气工程与自动化学院,福州大学电气工程与自动化学院,福州大学电气工程与自动化学院,福州大学电气工程与自动化学院 |
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| 摘 要： | 梅花触头接触不良而引发的过热性故障是开关柜和气体绝缘组合电器的典型缺陷之一，研究不同气体介质中梅花触头的载流摩擦特性和剩余寿命预测对于准确评估该类型设备的健康状态具有重要意义。文中根据真实梅花触头材料和工艺加工了试验试样，采用自行搭建的载流摩擦台开展空气、N2和SF6气体介质下的载流摩擦试验并获取接触电阻的退化曲线。分析触头表面形貌得知：试样表面在大电流和机械位移作用下出现了明显的粘着磨损，气体介质通过改变磨损区域的形貌和元素组成影响触头的退化过程。根据触头的V-T关系确定了接触电阻失效阈值，利用Savitzky-Golay滤波器对接触电阻原始曲线进行平滑滤波，采用贝叶斯更新的Wiener退化模型对不同气体介质下的梅花触头进行寿命预测，结果表明：与常规Wiener模型相比，采用贝叶斯更新的Wiener退化模型具有较好的预测准确度。空气中梅花触头的剩余寿命为9 500周期，N2中梅花触头的剩余寿命为61 300周期，SF6中梅花触头的剩余寿命为32 200周期。
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| 关 键 词： | 梅花触头 气体介质 载流摩擦 退化曲线 表面形貌 失效预测 |
| 收稿时间： | 2022/10/13 0:00:00 |
| 修稿时间： | 2023/3/20 0:00:00 |
Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium |
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| Authors: | LIN Rongxing WANG Yangcheng CHEN Zhipeng GUAN Xiangyu LIU Jiang CAI Kaiming |
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| Affiliation: | College of Electrical Engineering and Automation,Fuzhou University,College of Electrical Engineering and Automation,Fuzhou University,College of Electrical Engineering and Automation,Fuzhou University,College of Electrical Engineering and Automation,Fuzhou University,College of Electrical Engineering and Automation,Fuzhou University,College of Electrical Engineering and Automation,Fuzhou University |
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| Abstract: | Overheating fault caused by poor contact of plum blossom contact is one of the typical defects of switchgear and gas insulation combined appliances. The study of current-carrying friction characteristics and residual life pre-diction of plum blossom contacts in different gas medium is of great theoretical and applied significance for the accurate evaluation of the health status of this type of equipment. The test samples were processed according to the real plum blossom contact materials and process. The current-carrying tests in air, N2 and SF6 gas medium were carried out by using a self-built current-carrying table, and the contact resistance degradation curve was obtained. The analysis of the surface morphology of the contact shows that the sample surface shows obvious adhesive wear under the effect of large current and mechanical displacement, the gas medium affects the degra-dation process of the contact by changing the morphology and element composition of the wear region. The con-tact resistance failure threshold is determined according to the V-T relationship of the contact. The Savitz-ky-Golay filter is used to smooth the original curve of the contact resistance. The life of plum blossom contacts in three gas medium was predicted by using Wiener degradation model updated by Bayesian. The results show that the model is more accurate than the conventional Wiener model. The remaining life of the plum blossom contact in the air is 9,500 cycles. The life of the plum blossom contact in N2 is 61,300 cycles. The life of the plum blossom contact in SF6 is 32200 cycles.
Keywords: plum blossom contact; gas medium; current-carrying friction; degradation curve; surface morphology; failure prediction |
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| Keywords: | plum blossom contact gas medium current-carrying friction degradation curve surface morphology failure prediction |
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