雷电冲击电压下串联双空气球隙击穿现象研究  

Study on Breakdown of Series Double Sphere Gaps Under Lightning Impulse Voltage

作　　者：李秀广 荣毅 姚晓飞 陈佳莉 刘志远[2] 艾绍贵 马云龙 杜玮[3] LI Xiuguang;RONG Yi;YAO Xiaofei;CHEN Jiali;LIU Zhiyuan;AI Shaogui;MA Yunlong;DU Wei(Power Research Institute of the State Grid Ningxia Power Company Limited,Yinchuan 750002,China;State Key Laboratory ofEletrical Insulation and Power Equipment,Xi'an Jiaotong University,Xi'an 710049,China;Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,银川750002 [2]西安交通大学电力设备与电气绝缘国家重点实验室,西安710049 [3]国网电力科学研究院武汉南瑞有限公司,武汉430074

出　　处：《高压电器》2021年第2期42-47,共6页High Voltage Apparatus

基　　金：国家电网有限公司科技项目(5229DK17000V)。

摘　　要：文中将两个球—球气隙串联,模拟双断口断路器模型,串联的两个气隙承受标准雷电冲击电压(1.2/50μs),空气间隙击穿照片由相机拍摄。实验结果中的击穿现象可分为3种类型,将只有上球隙或下球隙被击穿定义为击穿类型Ⅰ;串联双球隙的非同期击穿定义为击穿类型Ⅱ;串联双球隙的同期击穿定义为击穿类型Ⅲ。进一步研究发现,3种击穿类型的成因与上下间隙的电场强度分布有关,上间隙最大场强与下间隙最大场强之比在6.9~1.52和0.8~0.2之间表现为击穿类型Ⅰ和击穿类型Ⅱ,在1.5~1.52和0.7~0.8之间表现为击穿类型Ⅱ,在1.5~0.7之间为击穿类型Ⅲ。研究结果对于揭示多断口断路器的击穿机理具有一定意义。In this paper,two sphere-sphere gaps are in series connection to simulate double breaks circuit breakermodel.The two sphere gaps in series withstand standard lightning impulse voltage(1.2/50μs)and the photos ofsphere gap breakdown is taken by camera.The breakdown phenomena in the experimental results can be divided intothree types:The breakdown of only the upper or lower sphere gap is defined as breakdown type I;the non-synchro-nous breakdown of series double series sphere gaps is defined as breakdown type II,while the synchronous break-down of the series double sphere gaps is defined as breakdown type III.It is found by further study that the causes ofthe three types of breakdown are related to the distribution of the electric field strength of the upper and lower gaps.The ratio of the maximum field strength of the upper gap to the lower gap between 6.9~1.52 is breakdown type I andbetween 0.8~0.2 is breakdown type II.The ratio between 1.5~1.52 and between 0.7~0.8 is breakdown type II andbetween 1.5~0.7 is breakdown type III.The study result has a definite significance for the breakdown mechanism ofmultiple break circuit breaker.

关 键 词：双断口 空气击穿 非同期击穿 间隙电场强度 

分 类 号：TM561[电气工程—电器]