轨道交通无线电能传输系统动态谐振线圈耦合模型研究
赖一雄罗金范建伟
Dynamic Resonant Coil Coupling Model of Rail Transit Wireless Power Transmission System
LAI YixiongLUO JinFAN Jianwei
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作者信息:中铁电气化局集团有限公司城铁公司， 100036， 北京
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Affiliation:Urban Railway Company of China CREC Railway Electrification Bureau (Group) Co., Ltd., 100036, Beijing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.06.019
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中图分类号/CLCN:TM724∶U231.8
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栏目/Col:研究报告
摘要:
鉴于传统采用平板式线圈结构的无线电能传输系统，不适合列车在运行过程中的电能传输，设计了一种E型铁心线圈的RX（接收端）耦合结构来满足轨道交通供电系统的动态需求。综合考虑车辆停靠的偏移、横向与竖向的间隙及列车上允许的安装体积，建立了动态谐振线圈耦合模型，分析了谐振状态的变量因素，包括线圈自感、线圈互感及耦合电容等；充分考虑工程应用的实际需求，对RX与TX（发射端）的结构参数进行了设计；通过系统仿真验证了E形铁心线圈分别在x轴(线路横向)正向进行偏移，在y轴(线路纵向)正向进行小范围偏移，在y轴负向进行大范围偏移，以及到达极限位置时对耦合系数的影响。结果表明：E形铁心线圈在x方向的偏移对自感和互感等耦合参数几乎无影响，E形铁心线圈结构除偏移至极限位置外线圈耦合系数基本保持稳定。该模型能够有效减小耦合系数变化对无线电能传输系统稳定性的影响。
Abstracts:
Given that the conventional wireless power transmission system using a flat coil structure is not suitable for the energy transmission of trains during operation, a coupling structure of an E shaped iron core coil for RX (receiving end) is designed to meet the dynamic requirements of rail transit power supply system. Comprehensively considering the deviation of vehicle parking, the horizontal and vertical clearances and the allowable installation volume on the train, a dynamic resonant coil coupling model is established, and the variable factors of the resonant status are analyzed, including self inductance, coil mutual inductance and coupling capacitance. Considering the actual requirements of engineering applications, the structural parameters of RX and TX (transmitting end) are designed. The E shaped iron core coil is simulated to verify its influence on coupling coefficient in different situations, such as an offset in x axis (line transverse) positive direction, a small range offset in y axis (line longitudinal) positive direction, a large range offset in y axis negative direction, and offset to the limit position. The results show that the E shaped iron core coil in the x axis direction has almost no effect on coupling parameters such as self inductance and mutual inductance. Except when the coil structure is offset to the limit position, the coupling coefficient of E shaped iron core coil remains relatively stable. The model can effectively reduce the impact of coupling coefficient changes on wireless power transmission system stability.
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