摘要
控制绝缘子串电场强度及电位分布是保证线路绝缘子运行可靠性的关键问题。为控制绝缘子串表面和高压端金具电场强度,采用有限元法,对玻璃绝缘子串电场强度及电位分布进行计算。基于控制变量法,研究了大小均压环的安装位置、环径及管径对电场强度的影响,从控制电场的角度得到大小均压环的合理参数。计算结果表明:加设大小均压环的前1/10长度玻璃绝缘子串承担电压比例由44.6%降至28.8%,下降百分比为48.86%;均压环、玻璃绝缘子及高压端金具表面最大电场强度分别为6.4 kV/cm、4.6 kV/cm、4.2 kV/cm远小于空气击穿场强。
The key problems of ensuring transmission line insulator operation reliability is controlling electric field and potential distribution of insulator. In order to control the electric field on the surface of insulator srings and high-voltage end fittings,the electric field and potential distribution of insulator strings are calculated by using finite-element method. The influence of installation position, grading rings radius and diameter of big and small grading rings on electric field is studied based on controlling variable method ,and the proper parameters of big and small grading rings are obtained on the consideration of controlling electric field. The one tenth of glass insulator is reduced to 28.8% electric field on the surface of grading calculation results show that the voltage of anterior from 44.6% which decreased 48.8% .The maximum rings, insulator and high-voltage end fittings are respectively 6.4 kV/cm,4.6 kV/cm,4.2 kV/cm which is far lower than air breakdown field.
出处
《电瓷避雷器》
CAS
北大核心
2015年第1期16-20,共5页
Insulators and Surge Arresters
关键词
玻璃绝缘子
电位分布
电场强度
均压环
有限元法
控制变量法
glass insulator
potential distribution
electric field intensity
variable method
finite-element method grading rings
controlling
