特高压系统用电容器组开关弧触头失效分析  

Failure Analysis of Capacitor Bank Switch Arcing Contact for Ultra-high Voltage System

作　　者：张乔[1] 杨晓红[1] 刘北阳[2] 张振乾[2] 李心一[3] 梁淑华[1] 

机构地区：[1]西安理工大学陕西省电工材料与熔(浸)渗技术重点实验室,西安710048 [2]中国电力科学研究院,北京100192 [3]西安西电高压开关有限责任公司,西安710018

出　　处：《高压电器》2016年第7期27-32,共6页High Voltage Apparatus

基　　金：国家自然科学基金项目(51371139;51201132);863计划支持项目(2015AA034304);陕西省电工材料与熔渗技术重点科技创新团队(2012KCT-25);陕西省科技统筹创新计划资助项目(2012KTCQ01-14)~~

摘　　要：为了提高特高压系统用电容器组开关弧触头的使用寿命,在拟工况环境下对其进行电寿命实验,发现Cu W/Cu Cr弧触头在近千次开合实验后失效。通过对失效前后弧触头的形貌、成分、组织及性能变化进行分析研究,寻找影响弧触头使用寿命的主要因素。结果表明:特高压系统用电容器组开关弧触头除电弧烧蚀引起弧触头失效外,机械磨损及挤压变形也是影响其使用寿命的关键因素。因此,协同提高耐电弧烧蚀、抗机械磨损及挤压变形的能力是制备高电气寿命触头材料的关键。To improve the service life of capacitor bank switch arcing contact used for ultra-high voltage system, the electrical endurance test under the environment of working condition was conducted. It was found that the CuW/CuCr arcing contact failed after about one thousand times of switch on and off test. The main factors influenc- ing the service life of the arcing contact were explored by analyzing the morphology, composition, microstructure and performance of the arcing contact before and after erosion. The results show that compared with conventional arcing contact materials, the failure of the arcing contact is caused not only by arc erosion, but also by mechanical wear and extrusion deformation. It is concluded that co-improvement of arcing erosion resistance, mechanical wear resistance and anti-extrusion deformation ability is important for producing the electric contact materials with long service time.

关 键 词：特高压 弧触头 失效分析 电弧烧蚀 机械磨损 

分 类 号：TM53[电气工程—电器] TM564