摘要
长棒形瓷绝缘子串金具数量少,沿串电位与电场分布不均,需优化设计其均压环结构。文中基于有限元原理,在Ansys软件中建立长棒形瓷绝缘子串三维仿真模型,分析均压环结构对绝缘子串电位与电场分布的影响,得到均压环最优结构参数。仿真结果表明:500 kV交流线路长棒形瓷绝缘子串均压环最优参数为,罩深300 mm,环径1 000 mm,管径125 mm;均压环表面最大场强可降至743.77 kV/m;3节绝缘子的整体分压比由2:1:1改善为约1.4:1:1。优化后的均压环明显改善了绝缘子串电位与电场分布,有利于绝缘子串长期运行安全。
Due to the special structure of the long-rod porcelain insulator string, its voltage distribution is more uneven than that of normal disk ceramic insulator. The shielding ring of the long-rod porcelain insulator string ought to be optimized. In this paper, a three-dimensional model of the long-rod porcelain insulator string on 500 kV transmission line is established in the finite element software Ansys to simulate the influences of shielding ring＇s structure on the electric field and potential distributions along the insulator string, and hence to optimize the structure parameters of the shielding ring. Simulation results show that the optimum structure parameters of the shielding ring are as follows： cover depth is 300 mm, ring diameter is 1 000 mm, and pipe diameter is 125 mm. The optimum structure parameters can help reduce the maximum peak electric field strength of shielding ring to 743.77 kV·m^-1, and improve the voltage division ratio of three-insulator string from 2：1：1 to 1.4： 1：1. Calculation results prove that the optimized shielding ring significantly improves the electric field and potential distributions along the long-rod porcelain insulator string, reduces the maximum voltage on single insulator, and lowers its maximum peak strength of electric field.
出处
《高压电器》
CAS
CSCD
北大核心
2017年第9期90-94,100,共6页
High Voltage Apparatus
关键词
长棒形瓷绝缘子
均压环
电位分布
电场分布
有限元法
porcelain long rod insulator
shielding ring
element method voltage distribution
electric filed strength
finite
