1100kV气体绝缘金属封闭输电线路用三支柱绝缘子电气性能优化  

Electrical Performance Optimization for Tri-Post Insulator on 1100 kV Gas-Insulated Metal-Enclosed Transmission Line

作　　者：贾云飞 高璐[1] 汲胜昌[1] 李心一 李志兵[3] 刘焱[3] JIA Yunfei;GAO Lu;JI Shengchang;LI Xinyi;LI Zhibing;LIU Yan(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;Xi’an Xidian Switch Electric Co.Ltd.,Xi’an 710077,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [2]西安西电开关电气有限公司,西安710077 [3]中国电力科学研究院,北京100192

出　　处：《西安交通大学学报》2020年第7期168-179,共12页Journal of Xi'an Jiaotong University

基　　金：国家重点研发计划资助项目(2017YFB0902500)。

摘　　要：为优化交流1 100kV气体绝缘输电线路中三支柱绝缘子的电气性能,提出了一种基于遗传算法的结构参数优化方法。建立三支柱绝缘子电场和应力场仿真模型,对绝缘子电气性能和机械性能进行校验,发现最大表面场强位于支柱和中心圆柱的连接处,为12.13 MV·m-1,大于12MV·m-1的许用值,可能引发闪络,有必要进行电气性能优化。建立三支柱绝缘子参数化模型,仿真研究各结构参数对三支柱绝缘子电气性能的影响,发现各结构参数的增大对绝缘子电气性能有不同程度的优化,但也会造成绝缘子体积的增加。在满足机械性能需求和绝缘子体积保持不变的条件下,以提高电气性能为目标,提出基于遗传算法的三支柱绝缘子结构参数优化方案,并且为减小计算量,提出该方案的简化方法。结果表明:在相同电压下,优化后的三支柱绝缘子的最大表面场强降低为11.36MV·m-1,绝缘裕度提高了6.3%,优化效果较好。所提方法兼顾了机械性能和绝缘子体积,具有较高的实用性和计算效率。For optimizing electrical performance of tri-post insulator on AC 1100 kV GIL,structural parameter optimization with genetic algorithm is carried out.Electric field and stress field simulation models of tri-post insulator are established.Checking the electrical and mechanical performances of the insulator,it is found that the maximum surface electrical field intensity is 12.13 MV·m-1 at the connection between the pillar and the central cylinder,which is higher than the allowable value of 12 MV·m-1.It is thus necessary to optimize the electrical performance.A parametric model of tri-post insulator is constructed and used to analyze the influence of structural parameters on electrical performance.It is found that the increase of each structure parameter can optimize the electrical performance,but this also leads to the increase of insulator volume.To improve the electrical performance,a genetic algorithm-based optimization scheme for the structure parameters is proposed under the condition that the mechanical performance is satisfied and the insulator volume remains unchanged.A corresponding simplified method of the scheme is also introduced to reduce the computation task.The results show that after optimization,the maximum surface electrical field strength of the tri-post insulator is weakened to 11.36 MV·m-1 under the same voltage,and the insulation margin is increased by 6.3%.The proposed scheme takes mechanical performance and insulator volume into account and has stronger practicability and higher computation efficiency.

关 键 词：气体绝缘输电线路 三支柱绝缘子 电气性能优化 机械性能校核 遗传算法 

分 类 号：TM216[一般工业技术—材料科学与工程]