Design and optimization of bushing at present mainly use the traditional experience method.The relevant research that adopts computer simulation to carry on the operation behavior of the bushing has appeared in recent...Design and optimization of bushing at present mainly use the traditional experience method.The relevant research that adopts computer simulation to carry on the operation behavior of the bushing has appeared in recent years.How to use the finite element method to research bushing was introduced in the article.Physics fields and many relevant parameters of one real bushing were calculated.Through the results of calculation,it indicate that the finite element method is very useful in bushing research of designing and optimizing.展开更多
In this paper,glass fibers were prepared by centrifugal-spinneret-blow(CSB) process.The molten glass got different flow rate from 390 kg/h to 270 kg/h by adjusting the electric current of platinum/10 rhodium alloy bus...In this paper,glass fibers were prepared by centrifugal-spinneret-blow(CSB) process.The molten glass got different flow rate from 390 kg/h to 270 kg/h by adjusting the electric current of platinum/10 rhodium alloy bushing.The diameter and microstructure of glass fibers have been investigated by scanning electron microscopy(SEM) and vertical optical microscope(VOM).The results indicated that the flow rate of molten glass was proportional to the diameter of glass fibers when the molten glass got main flow rate of 330 kg/h.The lower the flow rate was,the finer the average diameter was.展开更多
A design of a slot bushing with a volumetric field has been developed, which allows to produce continuous fibers from melts with difficult processing characteristics in order to produce fibers with better operating ch...A design of a slot bushing with a volumetric field has been developed, which allows to produce continuous fibers from melts with difficult processing characteristics in order to produce fibers with better operating characteristics. The operability of the design was confirmed when solving two problems of special technological complexity. 1. 400 and 800 orifice bushings for production of continuous fibers from the basalt melt have been developed and recommended for manufacture. 2. The process of production of continuous fibers from standard glass using 2400 orifice bushing with perforated plates instead of orifice tips without air cooling, has been realized for the first time.展开更多
换流变压器阀侧套管是特高压直流输电系统中的重要组件,传统故障预警与状态评估方式借助于大量物理试验和人工数据采集。该文围绕阀侧套管开展数字孪生模型研究,提出了电力设备数字孪生模型构建规范,并基于实体套管几何模型等建立了阀...换流变压器阀侧套管是特高压直流输电系统中的重要组件,传统故障预警与状态评估方式借助于大量物理试验和人工数据采集。该文围绕阀侧套管开展数字孪生模型研究,提出了电力设备数字孪生模型构建规范,并基于实体套管几何模型等建立了阀侧套管孪生模型。研究表明:阀侧套管数字孪生模型可有效计及阀侧套管芯子绝缘材料在-40~120℃温变和10^(-1)~10^(3 )Hz频变的非线性特性,进一步应用阀侧套管孪生模型演算获得套管导电杆与绝缘油直接换热特性,且阀侧套管尾部温度接近变压器油温90℃。提出的阀侧套管数字孪生模型显著提高了阀侧套管电磁-热流耦合模型的计算速度,实现了阀侧套管运行状态平台可视化。应用该文提出的电热耦合非线性数学模型和换流变阀侧套管数字孪生平台,生成套管相关结构参数,生产制造了缩比阀侧套管并通过负极性截波雷电冲击575 k V电压系列现场试验。基于所提出的数字孪生模型结构,搭建了换流变阀侧套管数字孪生可视化平台,有效提高了阀侧套管运维及监测效率,实现了对于阀侧套管可视化监测及数字孪生技术的应用。展开更多
基金National Science Foundation of China Yunnan United Foundation.(U0837601)the Natural Science Foundation of Yunnan Province,China(2010CF126)
文摘Design and optimization of bushing at present mainly use the traditional experience method.The relevant research that adopts computer simulation to carry on the operation behavior of the bushing has appeared in recent years.How to use the finite element method to research bushing was introduced in the article.Physics fields and many relevant parameters of one real bushing were calculated.Through the results of calculation,it indicate that the finite element method is very useful in bushing research of designing and optimizing.
文摘In this paper,glass fibers were prepared by centrifugal-spinneret-blow(CSB) process.The molten glass got different flow rate from 390 kg/h to 270 kg/h by adjusting the electric current of platinum/10 rhodium alloy bushing.The diameter and microstructure of glass fibers have been investigated by scanning electron microscopy(SEM) and vertical optical microscope(VOM).The results indicated that the flow rate of molten glass was proportional to the diameter of glass fibers when the molten glass got main flow rate of 330 kg/h.The lower the flow rate was,the finer the average diameter was.
文摘A design of a slot bushing with a volumetric field has been developed, which allows to produce continuous fibers from melts with difficult processing characteristics in order to produce fibers with better operating characteristics. The operability of the design was confirmed when solving two problems of special technological complexity. 1. 400 and 800 orifice bushings for production of continuous fibers from the basalt melt have been developed and recommended for manufacture. 2. The process of production of continuous fibers from standard glass using 2400 orifice bushing with perforated plates instead of orifice tips without air cooling, has been realized for the first time.
文摘换流变压器阀侧套管是特高压直流输电系统中的重要组件,传统故障预警与状态评估方式借助于大量物理试验和人工数据采集。该文围绕阀侧套管开展数字孪生模型研究,提出了电力设备数字孪生模型构建规范,并基于实体套管几何模型等建立了阀侧套管孪生模型。研究表明:阀侧套管数字孪生模型可有效计及阀侧套管芯子绝缘材料在-40~120℃温变和10^(-1)~10^(3 )Hz频变的非线性特性,进一步应用阀侧套管孪生模型演算获得套管导电杆与绝缘油直接换热特性,且阀侧套管尾部温度接近变压器油温90℃。提出的阀侧套管数字孪生模型显著提高了阀侧套管电磁-热流耦合模型的计算速度,实现了阀侧套管运行状态平台可视化。应用该文提出的电热耦合非线性数学模型和换流变阀侧套管数字孪生平台,生成套管相关结构参数,生产制造了缩比阀侧套管并通过负极性截波雷电冲击575 k V电压系列现场试验。基于所提出的数字孪生模型结构,搭建了换流变阀侧套管数字孪生可视化平台,有效提高了阀侧套管运维及监测效率,实现了对于阀侧套管可视化监测及数字孪生技术的应用。
