| 引用本文: | 余梦琪,杨增力,王友怀,王晶,张振,王镜毓,李银红,石东源.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(5):208-215 |
| Yu Mengqi,Yang Zengli,Wang Youhuai,Wang Jing,Zhang Zhen,Wang Jingyu,Li Yinhong,Shi Dongyuan.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(5):208-215 |
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| 摘要: |
| 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。 |
| 关键词: Scott牵引变压器 阻抗匹配平衡牵引变压器 牵引站供电线路 距离保护 整定计算 测量阻抗 |
| DOI：10.16081/j.epae.202601016 |
| 分类号:TM773 |
| 基金项目:智能电网重大专项(2030)(2025ZD0807400) |
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| Calculation method of most severe distance protection measured impedance of transmission line of electrified railway traction station considering balance traction transformers |
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Yu Mengqi1, Yang Zengli2, Wang Youhuai2, Wang Jing2, Zhang Zhen2, Wang Jingyu1, Li Yinhong1, Shi Dongyuan1
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1.State Key Laboratory of Advanced Electromagnetic Technology, Huazhong University of Science and Technology, Wuhan 430074, China;2.State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430074, China
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| Abstract: |
| 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 characteristics 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 studied. 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. |
| Key words: Scott traction transformer impedance-matching balance traction transformer transmission line of electrified railway traction station distance protection setting calculation measured impedance |
