| 基于电压比较的牵引供电系统异相短路保护 |
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| 引用本文： | 李辉,李钢,安林,马继政,史耀政.基于电压比较的牵引供电系统异相短路保护[J].电气化铁道,2011(1):31-34. |
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| 作者姓名： | 李辉 李钢 安林 马继政 史耀政 |
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| 作者单位： | 国电南瑞科技股份有限公司;鄂尔多斯南部铁路有限责任公司; |
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| 摘 要： | 通过测量阻抗轨迹法对异相短路故障的测量阻抗进行分析,得出牵引网发生异相高阻电弧短路故障时,按常规原理阻抗保护将拒动的结论。在异相短路故障特性的基础上,利用电压向量图法对故障电压进行分析,发现两供电臂电压和相间电压的幅值和相位发生有规律的变化,根据该电压变化特征,建立了基于两供电臂电压和相间电压的相关比较,同时结合电流增量保护来实现异相短路故障的保护。通过已有仿真分析和实际相间短路故障数据分析表明,该方法对异相短路故障具有良好的识别能力,可在牵引变电所保护系统中配置该保护。
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| 关 键 词： | 阻抗轨迹法 异相短路 电压向量图法 电分相绝缘器 |
Voltage Comparison Based Protection against Out-of-phase Short-circuit of Traction Power Supply System |
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| LI Hui,LI Gang,AN Lin etc..Voltage Comparison Based Protection against Out-of-phase Short-circuit of Traction Power Supply System[J].Electric Railway,2011(1):31-34. |
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| Authors: | LI Hui LI Gang AN Lin etc |
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| Institution: | LI Hui,LI Gang,AN Lin etc. |
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| Abstract: | Conventional impedance relay will refuse to trip according to an analysis of phase-to-phase faults of traction power supply system occurs by impedance locus. Based on the characteristics of phase-to-phase faults,by means of voltage vector diagram,variations of two power supply voltage and phase voltage are regular. According to this feature combined with current incremental protection,a new protection scheme is developed. The existing simulation results and the actual data on the faults show that,with its g... |
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| Keywords: | impedance locus phase-to-phase faults voltage vector diagram phase insulator |
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