| 基于暂态电流信号的EHV输电线路保护新方案 |
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| 引用本文： | 谭书平,杨明玉,张举. 基于暂态电流信号的EHV输电线路保护新方案[J]. 现代电力, 2006, 23(6): 21-24 |
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| 作者姓名： | 谭书平 杨明玉 张举 |
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| 作者单位： | 华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北保定,071003 |
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| 摘 要： | 提出了一种基于单端电流暂态信号小波变换的超高压输电线路快速保护方案。利用单端暂态电流信号的小波变换模极大值,对电流信号的李氏指数进行最小二乘法估计,来判断故障线路。通过大量ATP仿真证明,在各种故障情况下该保护算法能准确、可靠地动作。
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| 关 键 词： | EHV输电线路 暂态电流 小波变换 李氏指数 |
| 文章编号： | 1007-2322(2006)06-0021-04 |
| 修稿时间： | 2006-05-22 |
A New Transient Protection Scheme Based on Transient Current for EHV Transmission Line |
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| Tan Shuping,Yang Mingyu,Zhang Ju. A New Transient Protection Scheme Based on Transient Current for EHV Transmission Line[J]. Modern Electric Power, 2006, 23(6): 21-24 |
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| Authors: | Tan Shuping Yang Mingyu Zhang Ju |
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| Abstract: | In this paper, a new high-speed protection scheme for EHV transmission line based on the wavelet transform of transient current signals from one end of the line is presented. With the wavelet modulus maxima of one-terminal transient current, the Lipschitz exponent of transient current signals is estimated by using least square method, then the fault line and non-fault line are distinguished. A large of ATP simulation results prove that the protection scheme can delimitate between faulty lines and non-faulty lines accurately and reliably. |
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| Keywords: | EHV transmission line transient current wavelet transform Lipschitz exponent |
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