摘要
对不同直径屏蔽球表面存在毛刺缺陷时的表面电场分布进行了仿真分析,并在特高压试验大厅开展操作冲击放电试验。结果表明:毛刺的存在会大幅提高球表面的最大场强,当毛刺长度为1~5 mm时,其最大场强较表面洁净状态提高了40.4%~379.2%,且相同长度毛刺对屏蔽球表面场强的影响程度随球直径增大而增大;在5 m球-板间隙下,毛刺对屏蔽球操作冲击放电特性影响较为明显,当毛刺长度为1~5 mm时,其操作冲击放电电压降低了19.1%~30.4%。
The surface electric field distributions of shielding spheres with different diameters were simulated when there are burr defects on their surface, and the switching impulse discharge tests were carried out in UHV test hall. The results show that the existence of burr can greatly increase the maximum electric field intensity on the shielding sphere surface, and when the burr length is 1-5 mm, the maximum electric field intensity increase by 40.4% -379.2% compared with that of the shielding sphere with clean surface. When the burr length is the same, the influence degree of burr on the surface electric field intensity of shielding sphere increases with the increase of sphere diameter. Under the 5 m of sphere-plane gap, the effect of burr on the switching impulse discharge characteristics of shielding sphere is obvious,and the discharge voltage is reduced by 19.1%-30.4% when the burr length is 1-5 mm.
作者
律方成
赵映宇
王平
丁玉剑
钦雨晨
耿江海
徐健涛
朱咏璋
LV Fangcheng;ZHAO Yingyu;WANG Ping;DING Yujian;QIN Yuchen;GENG Jianghai;XU Jiantao;ZHU Yongzhang(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China;China Electric Power Research Institute,Beijing100192,China;State Grid Pinggao Group Co.,Ltd.,Pingdingshan 467001,China)
出处
《绝缘材料》
CAS
北大核心
2018年第9期82-86,共5页
Insulating Materials
基金
中央高校基本科研业务费专项资金资助(2017MS101)
国家电网公司科技项目(GYB17201600205)
