长寿命铜钨合金气体开关电极的烧蚀形貌

发布时间：2018-03-25 08:58

本文选题：二电极开关　切入点：铜钨合金　出处：《中国电机工程学报》2017年08期

【摘要】：研究密闭腔内结构紧凑、长寿命、大通流能力且能重复频率稳定工作的气体开关,对于油气开发中应用的脉冲功率装置意义重大。从工程实际出发,开展了对铜钨电极烧蚀形貌与相关特性的系统研究。搭建了开关实验平台,模拟实际工程中开关的变化过程。通过接触式非球面测量仪、共聚焦显微镜等设备完成对不同寿命阶段电极表面形貌的观测,得到表面轮廓线、平面显微图像,以及3维重建模型等数据,定量表述电极表面烧蚀形貌。结果表明,随着累计转移电荷量的增加,阳极、阴极的表面粗糙度均明显增加,且边缘区较中心区具有更高的粗糙度;对于同一区域,阴极都具有更高的粗糙度;20000次自击穿放电后,表面粗糙度增加至7.752?m(阴极,边缘)与5.573?m(阳极,边缘)。总体而言,阴极较阳极烧蚀更为严重,多次放电后表面形貌复杂,难以用简单模型描述。该研究是对传统气体开关技术的重要补充,具有相当的科研价值,同时也对油气开发等工业应用实际具有重要借鉴意义。
[Abstract]:It is of great significance to study the gas switch with compact structure, long life, large flow capacity and stable working frequency in the closed cavity for the application of pulse power device in oil and gas development. The ablation morphology and related characteristics of copper-tungsten electrode were studied systematically. A switch experimental platform was set up to simulate the changing process of switch in practical engineering. Confocal microscope was used to observe the surface morphology of electrode at different life stages. The surface profile, plane microscopic image and 3D reconstruction model were obtained, and the ablation morphology of electrode surface was quantitatively described. With the increase of accumulative transfer charge, the surface roughness of anode and cathode increases obviously, and the edge area has higher roughness than the center area, and for the same area, the cathode has a higher roughness after 20000 self-breakdown discharges. Surface roughness increased to 7.752? M (cathode, edge) with 5.573? M (anode, edge). Generally speaking, the cathode is more serious than anode ablation, the surface morphology after multiple discharge is complex, it is difficult to describe by simple model. This research is an important supplement to traditional gas switch technology and has considerable scientific research value. At the same time, it has important reference significance to the industrial application such as oil and gas development.
【作者单位】：电力设备电气绝缘国家重点实验室(西安交通大学);
【基金】：国家高技术研究发展计划(863计划)(2013AA064502)~~
【分类号】：TM564

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