摘要
要提高牵引网线路电气参数的计算精度,就须考虑气候环境对牵引网电气参数的影响.首先,基于电磁场理论,推导了考虑覆冰影响的电容参数公式中电位系数的计算方法;其次,引入宏观电介质理论得出了空气相对介电系数和空气密度之间的联系,进而得出了空气密度与气候环境因素间的关系;最后,建立了空气相对介电系数和环境温度、相对湿度、大气压强等环境因素之间的计算表达式.通过算例,对比分析了等效覆冰厚度对牵引网导线电容参数的影响,以及空气相对介电系数和电容参数受气候环境因素的影响.
In order to improve the calculation accuracy of electrical parameters of traction network,it is necessary to take the influence of climate environmental conditions into consideration.Firstly,based on the theory of electromagnetic field,the calculation method of potential coefficient considering the effect of icing in the formula for calculating capacitance parameters is deduced.Secondly,the relationship between air relative dielectric coefficient and air density is obtained by introducing the macro-dielectric theory,then the relationship between air density and climate environmental conditions is obtained.Finally,the calculation expression of relative dielectric coefficient of air and climate environmental factors such as ambient temperature,relative humidity and atmospheric pressure is established.Through several examples,the influence of the equivalent icing thickness on the capacitance parameters of the traction network,and the influence of climate environmental factors on the air relative dielectric coefficient and capacitance parameters are compared and analyzed.
作者
潘存磊
田铭兴
孙立军
PAN Cun-lei;TIAN Ming-xing;SUN Li jun(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Gansu Province Engineering Laboratory for Rail Transit Electrical Automation,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Opto-Technology and Intelligent Control Ministry of Education,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《兰州交通大学学报》
CAS
2019年第6期36-42,共7页
Journal of Lanzhou Jiaotong University
基金
甘肃省科技计划资助项目(17JR5RA083)
国家自然科学基金(51367010,51867012)
甘肃省重点研发计划资助项目(18YF1FA058)
兰州交通大学优秀科研团队项目(201701)
关键词
高速铁路
牵引网
电容参数
气候环境条件
覆冰线路
high-speed railway
traction network
capacitance parameters
climate environmental conditions
icing transmission
