摘要
基于有限元数值仿真计算方法,建立了750 kV线路杆塔—导线—绝缘子的塔线三维电场仿真模型,研究优化750 kV复合绝缘子均压环的结构参数,并对均压环的均压效果进行了分析。计算结果表明,均压环可显著地改善绝缘子电场分布,高压端均压环表面的最大电场强度控制在20 kV/cm以下,可见电晕和无线电干扰试验的结果表明,高压端金具和均压环的起晕电压、无线电干扰水平均符合国家标准或规程要求,设计的均压环能够满足750 kV输电线路对复合绝缘子的使用要求。研究结果为750 kV输电线路外绝缘设计提供了有益的参考。
In this paper,the structural parameters of grading rings for 750 kV composite insulator were optimized by means of finite element numerical simulation based on the building of 750 kV line tower-conductors-insulators three-dimensional electric field simulation models.The effects of the grading rings were analyzed.The calculation results show that grading ring can significantly improve the distribution of electric field,the greatest electric field strength on surface of the line end grading ring less than 20 kV/cm.The corona and RIV tests show the corona inception voltage and radio interference level of the fittings and corona rings can well meet the national standards or specifications.The grading rings designed can meet the requirements of 750 kV transmission line.The result provides a useful reference for the external insulation design of 750 kV transmission.
出处
《高压电器》
CAS
CSCD
北大核心
2010年第12期5-8,共4页
High Voltage Apparatus
关键词
750kV复合绝缘子
均压环
电场强度
有限元法
750 kV composite insulator
grading ring
electric field strength
finite element methods
作者简介
薄学微（1962-），男，高级工程师，硕士，现从事复合绝缘子的设计工作。
