强风作用下复合空心绝缘子的电场计算  

Electric Field Calculation of Composite Hollow Insulator with Strong Wind Reflection

作　　者：张楠 申子魁 杨继红 赵海鹏 谷倩倩 贾志东[2] 张豪峰 关志成[2] ZHANG Nan;SHEN Zikui;YANG Jihong;ZHAO Haipeng;GU Qianqian;JIA Zhidong;ZHANG Haofeng;GUAN Zhicheng(Xinjiang Power Supply Company Maintenance Company,Ummqi 830000,China;Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environment,Graduate School at Shenzhen,Tsinghua University,Guangdong Shenzhen 518055,China)

机构地区：[1]国网新疆电力公司检修公司,乌鲁木齐830000 [2]清华大学深圳研究生院深圳复杂滨海环境电力装备可靠性工程实验室,广州深圳518055

出　　处：《高压电器》2020年第3期111-117,共7页High Voltage Apparatus

基　　金：国家自然科学基金(51477085);国家电网公司科技项目资助(SGTYHT/15-JS-191)。

摘　　要：高压断路器进出线的复合空心绝缘子主体长约8~10 m,弹性模量远小于瓷绝缘子。复合空心绝缘子在强风下会产生风偏,风偏量受风速大小和工作自身弹性模量影响。大幅风偏是否会引起复合空心绝缘子内外电场强度的畸变,劣化内外绝缘鲜有研究。由于高压复合空心绝缘子成本高,投运时间短,退运下来的样品较少。文中采用有限元分析的方法模拟强风工况,进行电场计算。针对750 kV断路器复合空心绝缘子在强风下振动的1阶模态振型,计算绝缘关键区域的电场强度,阐明风偏对接地屏蔽电极附近的电场畸变的危害最大,并给出了风速阈值。文中指出应该监测强风地区的风速、玻璃钢管的工作温度以及复合空心绝缘子的风偏量。The composite hollow insulator has a length of about 8~10 m,and the elastic modulus is less than porcelain insulator.The strong wind deflects the composite hollow insulator,where the wind deflection is affected by the wind speed and the elastic modulus under the working situation.Whether the large wind deflection will cause the distortion of the electric field strength inside and outside the composite hollow insulator,is rarely studied.Due to the high cost and fewer returned samples,in this paper,finite element analysis method is used to simulate the electric field the strong wind conditions.According to the first order modal vibration mode of the composite hollow insulator of 750 kV,the electric field in the critical region of the insulation is calculated.It is clarified that the wind reflection can cause severe distortion of the electric field near the grounding shield electrode.This paper points out that in the strong wind area,the wind speed,the working temperature of the FRP pipe and the wind reflection of the composite hollow insulator should be monitored.

关 键 词：复合空心绝缘子 温升 风偏量 电场计算 

分 类 号：TM216[一般工业技术—材料科学与工程]