摘要
根据750kV输电线路实际情况和复合绝缘子的特点，选择有限元法，应用ANsYS软件对在海拔高度1500～3000in地区使用的交流750kV复合绝缘子建立电场计算模型，计算复合绝缘子V型串沿面电场强度分布和电位分布。为控制复合绝缘子表面电场，研究了均压环的环径、管径和抬高距离对绝缘子电场强度分布的影响规律，从控制电场角度得出合理的均压环结构参数。计算结果表明，均压环可显著地改善绝缘子电场强度分布，高压端均压环表面的最大电场强度峰值控制在1．54kV／mm以下，设计的均压环能够满足750kV输电线路对复合绝缘子的使用要求，为750kV交流输电线路的外绝缘设计提供有益的参考。
According to the features of composite insulator and the actual situation of the 750 kV transmission line, this paper selects finite element method. ANSYS finite element software is used to establish 2-D and 3-D model for 750 kV composite insulator used in the areas with the altitude of 1 500-3 000 meters, to calculate the electric field intensity distribution and potential distribution on the surface of the V composite insulator. The effect of the grading ring for improving the electric field distribution on the composite insulator is studied by changing the parameters of the grading ring, and the proper parameters of the ring diameter, diameter of the ring tube, and the position of the ring in its vertical plane are investigated on the consideration of controlling electric field that cannot exceed the corona inception level. 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 1. 54 kV/mm. 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
《实验技术与管理》
CAS
北大核心
2013年第9期53-57,共5页
Experimental Technology and Management
基金
青海大学一类课程建设项目(KC-12-1-4)
