摘要
随着特高压应用的复合支柱绝缘子用芯体直径不断增大,现有标准中热机试验的温升保持时间合理性值得讨论。本文通过等效模拟热量在复合材料中的传递形式,估算复合绝缘支柱芯体的导热系数。以有限元模拟方法,用ANSYS软件建立复合绝缘支柱芯体的数学模型,输入估算的导热系数及热机试验环境条件,模拟支柱芯体内部温度变化过程。设定型式试验,通过在支柱芯体内部不同厚度位置设置监测点,实时记录均匀受热状态下芯体内部温度随时间的变化曲线。试验表明支柱芯体内部完全达到(50±5)℃需62800 s,远大于热机试验时间43200 s,现有试验方法存在缺陷。仿真模拟与产品实际温升误差值分别为6.2687%、6.5026%、5.5696%,仿真模拟结果较为准确。
As the diameter of the core of the composite post insulator for UHV applications continues to increase,the rationality of the temperature rise retention time of the existing standard heat engine test is worth discussing.In this paper,the thermal conductivity of the composite insulating pillar core is estimated by equivalently simulating the heat transfer pattern in the composite.Using the finite element simulation method,the mathematical model of the composite insulating pillar core was established by ANSYS software,and the estimated thermal conductivity and thermal test environment conditions were input to simulate the internal temperature change process of the pillar core.We set the type test,set the monitoring point in different thickness positions inside the pillar core,and record the curve of the internal temperature of the core with time under the uniform heating state in real time.The test result shows that the internal height of the pillar core reaches(50±5)℃,which is 62800 s,which is much larger than the thermal test time of 43200 s.The existing test methods have defects.The simulation temperature and the actual temperature rise error of the product are 6.2687%,6.5026%,and 5.5696%,respectively.The simulation results are of good accuracy.
作者
邢照亮
张卓
袁金
赵卫生
XING Zhao-liang;ZHANG Zhuo;YUAN Jin;ZHAO Wei-sheng(State Key Laboratory of Advanced Power Transmission Technology,Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102209,China;BeiBo Electric Power Cmposite Materials Co.,Ltd.,Zaozhuang 277500,China)
出处
《复合材料科学与工程》
CAS
北大核心
2020年第4期79-83,共5页
Composites Science and Engineering
基金
国家电网公司科技项目(SGRIDGKJ[2017]607)
国网浙江省电力有限公司项目(SGZJWZYJYJJS1800141)。
关键词
复合绝缘支柱芯体
特高压
导热系数
有限元模拟
热机试验
复合材料
composite insulating pillar
UHV
thermal conductivity
finite element simulation method
the heatengine test
composite
