V/X接线牵引变压器的温升特性  

Temperature Rise Characteristics of V/X Wiring Traction Transformer

作　　者：韦国[1,2] 闵英杰[1] 周利军[1] 吕玮[1] 吴广宁[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]中国中铁电气化局集团有限公司,北京100036

出　　处：《中国铁道科学》2011年第3期80-85,共6页China Railway Science

基　　金：铁道部科技研究开发计划项目(2002J036)

摘　　要：针对V/X接线牵引变压器独特的接线方式、电气特性和负载特性,基于热电类比原理和变压器内部热传递过程建立V/X接线牵引变压器内部热路模型。参照电路理论推导温升计算微分方程,并根据热特征参量间的相互关系,建立V/X接线牵引变压器内部温升计算模型。以1台机车从驶入到驶出某V/X接线牵引变压器供电区间的过程为例,仿真计算顶层油温度曲线和绕组热点温度曲线。分析绕组绝缘寿命的影响因素,并根据牵引负荷的特点,提出适用于V/X接线牵引变压器的绝缘寿命损失计算方法。According to the unique connection mode, electrical characteristics and load characteristics, the internal thermal circuit of V/X wiring traction transformer was established based on the thermoelectricity analogy principle and the thermal transfer process in transformer. Referring to the circuit theory, the dif- ferential equation for calculating temperature rise was deduced. According to the relationships among the thermal characteristic parameters, the calculation model was constructed for the internal temperature rise of V/X wiring traction transformer. The process of an electric locomotive running in and out the power supply section of a V/X wiring traction transformer was taken for example, the temperature curves of the top layer oil and the winding hot-spot were simulated. Through analyzing the influencing factors of wind- ing insulation life and based on the characteristics of traction load, a calculation method for insulation life loss applicable to V/X wiring traction transformer was proposed.

关 键 词：V/X接线牵引变压器 热路 热点温度 绝缘寿命 

分 类 号：U224.22[交通运输工程—道路与铁道工程] TM922.73[电气工程—电力电子与电力传动]