| 利用电流固有频率的VSC-HVDC直流输电线路故障定位 |
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| 引用本文： | 蔡新雷,宋国兵,高淑萍,索南加乐,李广.利用电流固有频率的VSC-HVDC直流输电线路故障定位[J].中国电机工程学报,2011,31(28). |
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| 作者姓名： | 蔡新雷 宋国兵 高淑萍 索南加乐 李广 |
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| 作者单位： | 西安交通大学电气工程学院,陕西省西安市,710049 |
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| 基金项目： | 国家自然科学基金项目(51037005,51177128)~~ |
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| 摘 要： | 电压源换流器型直流输电（voltage source converter HVDC，VSC．HVDC）线路故障暂态过程中具有相对于交流线路更强的固有频率信号。由于VSC．HVDC直流输电线路两侧并联大电容，在高频的固有频率下系统阻抗可等效为电容阻抗，其值很小，行波在系统侧近似为全反射，因此，VSC，HVDC直流输电线路的固有频率只与故障距离和波速度有关。据此，提出通过对单端电流运用Prony算法进行频谱分析，获取其固有频率进而实现直流输电电路故障定位的方法。仿真结果表明该方法可实现VSC—HVDC直流输电线路的快速、准确定位。
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| 关 键 词： | 电压源换流器型直流输电 直流输电线路 故障定 位 固有频率 |
A Novel Fault-location Method for VSC-HVDC Transmission Lines Based on Natural Frequency of Current |
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| CAI Xinlei,SONG Guobing,GAO Shuping,SUONAN Jiale,LI Guang.A Novel Fault-location Method for VSC-HVDC Transmission Lines Based on Natural Frequency of Current[J].Proceedings of the CSEE,2011,31(28). |
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| Authors: | CAI Xinlei SONG Guobing GAO Shuping SUONAN Jiale LI Guang |
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| Affiliation: | CAI Xinlei,SONG Guobing,GAO Shuping,SUONAN Jiale,LI Guang(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,Shaanxi Province,China) |
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| Abstract: | The natural frequency signal of voltage source converter HVDC(VSC-HVDC) transmission lines is more obvious than that of AC lines in transient process.As the impact of the shunt capacitor on both sides of the DC lines in VSC-HVDC,the system impedance can be equivalent to capacitor impedance in the natural frequency,and its value is very small.The traveling wave is total reflection in the system side.Consequently,the natural frequency of the VSC-HVDC transmission lines is only related to fault distance and wa... |
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| Keywords: | voltage source converter HVDC(VSC-HVDC) HVDC transmission line fault location natural frequency |
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