摘要
为研究长棒形瓷绝缘子电位与电场分布,以指导现有运维策略。文中采用有限元法,建立500 kV长棒形瓷绝缘子串三维模型,仿真并分析其电位和电场分布。结果表明:沿绝缘子串高度方向,长棒形瓷绝缘子串表面电位呈现三段式曲线,绝缘子串两端电位变化较快;其表面电场强度随高度变化呈U形曲线分布,场强最大值在高压端第1片伞裙与棒芯连接处。相比于普通悬式绝缘子串,长棒形瓷绝缘子串金具较少,其电位和电场分布更不均匀。
The voltage and electric field distribution of long rod type ceramic insulator helps to guide the existing operational strategy. The simulative calculation of long rod type ceramic insulator string in 500 kV transmission line is carried out through finite element method in three-dimensional model, and in comparison with disk ceramic insulator string. The result shows that the voltage distribution of long rod type ceramic insulator string presents a decline curve of three parts, and the electric potential of two ends declines faster than the middle. The electric field strength distribution of long rod type ceramic insulator string presents a U-shaped curve and the maximum field strength lies on the first rod core areas of umbrella skirt root of the high voltage end Compared with disk ceramic insulator string, long rod type ceramic insulator has less fittings, its voltage and electric field distribution is more uneven.
出处
《高压电器》
CAS
CSCD
北大核心
2017年第10期100-104,110,共6页
High Voltage Apparatus
关键词
长棒形瓷绝缘子
电压分布
电场强度
有限元法
long rod type porcelain insulator
voltage distribution
electric filed strength
finite element method
