铁道科学与工程学报2026，Vol.23Issue(8)：3969-3981,13.DOI:10.19713/j.cnki.43-1423/u.T20251682
单相组合式同相供电系统牵引网及其边界频率特性研究
Research on the traction network and boundary frequency characteristics of a single-phase combined co-phase power supply system
摘要
Abstract
To investigate the traveling wave boundary protection of the single-phase combined co-phase traction power supply system,it is necessary to study the frequency characteristics of the traction network and its boundaries in this system.Considering that each traction substation is independent of the traction network,a traction substation and a section of contact wire can be regarded as the boundary of the traction network.By establishing frequency-domain models of the traction network and its boundaries in the single-phase combined co-phase traction power supply system,and applying the phase-mode transformation theory and multi-conductor transmission line impedance analysis method,the frequency characteristics of the traction network were systematically analyzed;for the active power compensation-type co-phase compensation device,an equivalent impedance model based on an LCL filter and a composite control strategy was constructed to clarify the frequency-domain characteristics of the traction network boundaries;the differences in high-frequency signal attenuation between the traction network and the system boundaries were comparatively analyzed,and the influence of fault point location on the amplitude-frequency characteristics of fault signals collected at protection measurement points was discussed.The results indicate that in the single-phase combined co-phase traction power supply system,both the traction network lines and their boundaries produce significant attenuation of high-frequency components of fault transients,and the longer the traction network line,the more obvious the attenuation effect on high-frequency components;under practical traction network lengths,the attenuation effect of the traction network boundaries on high-frequency transient signals is much stronger than that of the traction network itself;different fault point locations affect the strength of high-frequency transient signals collected at protection installation points for internal faults,high-frequency signals are only attenuated by the traction network with higher amplitudes,while for external faults,signals undergo dual high-frequency attenuation by both the traction network lines and their boundaries,resulting in lower amplitudes of high-frequency components.The research results lay a solid theoretical foundation for a novel traveling wave protection principle based on the differences in high-frequency transient signals of the single-phase combined co-phase traction power supply system.关键词
单相组合式同相供电/线路边界/频率特性/高频暂态信号/同相补偿装置Key words
single-phase combined co-phase traction power supply system/line boundary/frequency characteristics/high-frequency transient signals/co-phase compensation device分类
信息技术与安全科学引用本文复制引用
赵四洪,马泽龙,邢超,杨珠丹,蔡嘉瀚,陈仕龙..单相组合式同相供电系统牵引网及其边界频率特性研究[J].铁道科学与工程学报,2026,23(8):3969-3981,13.基金项目
国家自然科学基金资助项目(52067009) （52067009）
