一种新型铁路稳压供电变压器结构设计  

Structure Design of a New Type of Voltage Stabilizing Supply Transformer for Railway

作　　者：靳忠福[1] JIN Zhongfu(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《高压电器》2021年第1期176-181,188,共7页High Voltage Apparatus

摘　　要：文中研究的目的是利用铁路稳压供电变压器从牵引供电系统取电向铁路沿线的电力负荷供电。在普通变压器的基础上,铁路稳压供电变压器增加气隙磁分路和谐振电容,由此发生串并联铁磁谐振以实现滤波稳压。并结合普通变压器的设计公式、等效磁路和等效电路求出其铁心、线圈、气隙及电容等具体参数。根据参数在Maxwell中建立变压器模型,仿真结果表明其稳压的下限值为17 kV(上限值主要受发热的影响),谐波含量较多。因此,利用谐振电容和滤波电感组成的谐振滤波器对其进行了改进优化,将供电臂电压的实测数据作为稳压供电变压器的输入电压,结果表明:其抑制谐波作用明显。理论和仿真结果说明改进后铁路稳压供电变压器具有稳压和抑制谐波的特点。The purpose of the study in this paper is to use the voltage stabilizing supply transformer for railway to get the power from the traction power supply system for loads along the line.On the basis of general transformer,the voltage stabilizing transformer for railway is provided with sphere gap magnetic shunt and resonant capacitor,thereby generating series-parallel ferromagnetic resonance to achieve voltage regulation.Such specific parameters as core,coil,sphere gap and capacitance of the transformer are obtained with combination of the design formula,equivalent magnetic and electric circuit of general transformer.The transformer model is established in Maxwell according to the parameters.It is shown by the simulation result that its lower limit of voltage regulation is 17 kV(the upper limit is mainly affected by the heat),and the harmonic content is more.Therefore,the resonant filter composed of resonant capacitor and filter inductor is used for its improvement and optimization.The actually measured voltage data in the power supply section is used as the input voltage of the voltage stabilizing transformer.It is shown by the result that its harmonic suppression effect is obvious.Both theory and simulation results also show that the improved railway voltage stabilized power supply transformer has the characteristics of voltage stabilization and harmonic suppression.

关 键 词：稳压变压器 牵引供电系统 谐振滤波器 MAXWELL 

分 类 号：U223[交通运输工程—道路与铁道工程] TM402[电气工程—电器]