500kV交流复合绝缘子电场分布优化设计  

Optimal Design of Electrical Field Distribution for500 kV AC Composite Insulator

作　　者：陈桂阳 成立[2] 裴慧坤 王黎明[2] 杨兴 

机构地区：[1]深圳市供电局,深圳518055 [2]清华大学深圳研究生院,深圳518055

出　　处：《陕西电力》2015年第3期58-62,共5页Shanxi Electric Power

基　　金：国家重点基础研究发展计划项目资助(973项目)(2011CB209406)

摘　　要：基于有限元数值仿真分析方法,建立了500 kV线路杆塔-导线-绝缘子的塔线3D电场仿真模型。并以此为基础,研究了500 kV交流复合绝缘子运行时沿面电场的分布情况,以及采用改变屏蔽深度、加挂大电容绝缘子、加大均压环管径以及采用双环结构等4种优化方法后,绝缘子的沿面场强分布。计算结果表明,4种方法均可不同程度地降低绝缘子高压侧沿面场强的最大值,而加挂2片玻璃绝缘子的方法可最有效地降低高压侧承担的电压。最后利用现场绝缘子的红外温升试验证明了优化方法的可靠性。仿真结果以及试验结果为现场线路的改造设计提供了依据。The 500 kV line-conductor-insulator 3D electrical simulation model is built based on finite element method（FEM）. The distribution of electric field on the 500 kV AC composite insulators in service is studied. 4 optimal design methods including changing the shielding depth, external large capacitive insulators, enlarging the diameter of grading rings and using a double-ring structure are compared with the help of analysis software. The simulation results indicate that all the 4 designs could improve the distribution of electric field, the external large capacitive insulators method has the best effect on the voltage loaded on the HV side. Finally voltage loaded test with infrared monitoring has carried out and proved the effectiveness of optimal designs. All the simulation and test results have provided a reference to the retrofit of transmission line at site.

关 键 词：500 kV复合绝缘子 有限元法 场强优化 异常发热 

分 类 号：TM74[电气工程—电力系统及自动化]