1.华中科技大学 强电磁技术全国重点实验室,湖北 武汉 430074
2.国网湖北省电力有限公司,湖北 武汉 430074
余梦琪(2001 —),女,硕士研究生,主要研究方向为计及牵引变压器的电网短路计算与继电保护整定计算(E-mail:1452390090@qq.com);
石东源(1974 —),男,教授,博士研究生导师,博士,通信作者,主要研究方向为电网继电保护整定计算软件技术、电网故障信息综合分析与诊断(E-mail:dongyuanshi@hust.edu.cn)。
收稿:2025-09-05,
修回:2026-01-27,
网络首发:2026-02-02,
纸质出版:2026-05-10
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余梦琪,杨增力,王友怀等.计及平衡牵引变压器的牵引站供电线路距离保护最严苛测量阻抗计算方法[J].电力自动化设备,2026,46(05):208-215.
Yu Mengqi,Yang Zengli,Wang Youhuai,et al.Calculation method of most severe distance protection measured impedance of transmission line of electrified railway traction station considering balance traction transformers[J].Electric Power Automation Equipment,2026,46(05):208-215.
余梦琪,杨增力,王友怀等.计及平衡牵引变压器的牵引站供电线路距离保护最严苛测量阻抗计算方法[J].电力自动化设备,2026,46(05):208-215. DOI: 10.16081/j.epae.202601016.
Yu Mengqi,Yang Zengli,Wang Youhuai,et al.Calculation method of most severe distance protection measured impedance of transmission line of electrified railway traction station considering balance traction transformers[J].Electric Power Automation Equipment,2026,46(05):208-215. DOI: 10.16081/j.epae.202601016.
牵引站供电线路的继电保护整定计算需要根据牵引变压器的特殊接线形式进行分析。结合Scott、阻抗匹配平衡牵引变压器的特点,研究了其发生低压侧故障时的距离保护最严苛测量阻抗计算方法。通过推导并深入分析测量阻抗计算式,确定了最小测量阻抗的折算系数,旨在避免因保护范围伸出牵引变压器低压侧而失去选择性,并确定了最大测量阻抗的折算系数以便校验灵敏度。通过仿真实验,验证了所推导的保护安装处测量阻抗计算式以及所提方法的正确性。研究实现了计及平衡牵引变压器的牵引站供电线路距离保护定值的快速计算,为形成更全面、完善的牵引站供电线路继电保护整定原则提供了理论依据。
The relay protection setting calculation of transmission line of electrified railway traction station needs to be analyzed according to the special wiring forms of traction transformers. Based on the characte-ristics of Scott and impedance-matching balance traction transformers,a calculation method of the most severe distance protection measured impedance with faults on the low-voltage side of traction transformers is stu-died. By deriving and analyzing the calculation formulas for measured impedance in depth,the conversion factor for minimum measured impedance is confirmed in order to avoid loss of selectivity due to the extension of protection range to the low-voltage side of traction transformers,and the conversion factor for maximum measured impedance is confirmed in order to check the sensitivity. Through the simulation experiment,correctness of the derived calculation formulas for measured impedance and the calculation method of the most severe measured impedance is verified. The fast calculation of distance protection setting value of transmission line in electrified railway traction station considering balance traction transformer is realized,which provides a theoretical basis for the formation of a more comprehensive and perfect relay protection principle of transmission line in electrified railway traction station.
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