鸟啄对220kV站用复合支柱绝缘子表面电场特性的影响

Effect of Bird Pecking on Surface Electric Field Characteristics of 220 kV Composite Post Insulator

由于220kV站用复合支柱绝缘子,伞裙和护套材料易被鸟啄导致损伤,严重威胁电网安全。因此本文基于有限元方法研究鸟啄对220kV站用复合支柱绝缘子表面电场特性的影响。研究结果表明:鸟啄损伤不仅对损伤部位的电场有影响,也会影响整个绝缘子的表面电场,顶端有损伤的绝缘子表面电场最大值和平均值均比未损伤时的增加。且整个伞裙的电场平均值随着损伤面积的增加而增加。顶端损伤对整个绝缘子伞裙的表面电场最大值和平均值影响最大。但底端损伤对损伤位置的表面电场最大值影响最大。

Because the umbrella skirt and sheath material of 220kV composite post insulator is easy to be pecked by birds,which seriously threatens the security of power grid.Therefore,based on the finite element method,this paper studies the influence of bird pecking on the surface electric field characteristics of 220kV composite post insulator.The results show that bird pecking damage not only affects the electric field of the damaged part,but also affects the surface electric field of the whole insulator.The maximum and average value of the surface electric field of the insulator with damage at the top are higher than those without damage.The average electric field of the whole shed increases with the increase of the damage area.The top damage has the greatest influence on the maximum and average surface electric field of the whole insulator shed.However,the bottom damage has the greatest influence on the maximum surface electric field at the damage location.