摘要
为了研究缺陷对特高压盆式绝缘子电场分布的影响,采用有限元软件ANSYS建立了特高压盆式绝缘子的基本计算模型,研究了气体间隙、凸起和凹陷等缺陷对盆式绝缘子电场分布的影响。结果表明,气体间隙长度越大,宽度越小,引起的场强越高;凸起和凹陷呈现出的场强峰值及电场分布规律均与其尺寸无关,电场增强系数与其位置无关;附着金属颗粒会显著增强其边缘的电场强度,电场增强系数随颗粒径向位置的增大而减小,随颗粒狭长程度的增大而增大;悬浮导电颗粒影响下,导电颗粒尺寸越大,距盆体表面越近,则盆体表面最大场强越高;内部气泡的电场增强系数与其尺寸及其在盆体内的位置无关。在研究的几种缺陷里,附着金属颗粒增强电场的影响最大,悬浮金属颗粒影响的区域范围最广。
To analyze the influences of defects on the electric field distribution,we established a basic model of the UHV GIS spacer by the finite element analysis software, ANSYS. Then, the effects of defects, for instance, gap, protrusion and pit on the electric field distribution of GIS spacer were presented. According to the simulation results, the longer and thinner the gap is, the higher the electric field strength will be. Moreover, sizes of protrusion and pit have no relations with the peak value and distribution of electrical field, and positions hardly affect the electrical field enhancement factor. Adhered metallic particles can significantly enhance the electrical field intensity, enhancement factor will decrease with radius position increasing, and a narrower particle will lead to a larger enhancement factor. For suspended metallic particle case, larger size and shorter distance to spacer surface will lead to higher electrical field. Inner voids with different sizes and positions have almost the same electrical field enhancement factor. Among the investigated defects, adhered metallic particles have the most intensification effect on electric field strength, and suspended metallic particles have the effect in the most widespread area.
作者
王浩然
郭子豪
张丝钰
杜进桥
彭宗仁
刘鹏
WANG Haoran, GUO Zihao, ZHANG Siyu, DU Jinqiao, PENG Zongren, LIU Peng(State Key Laboratory of Electrical Insulation and Power Equipment, Xi＇an Jiaotong University, Xi＇an 710049, Chin)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第3期982-992,共11页
High Voltage Engineering
基金
国家自然科学基金(51521065)
国网浙江省电力公司科技项目(SGZJ0000JJJS1500012)~~
