| 基于数学形态学的线路超高速方向保护 |
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| 引用本文： | 赵青春,邹力,刘沛.基于数学形态学的线路超高速方向保护[J].电网技术,2005,29(21):75-80. |
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| 作者姓名： | 赵青春 邹力 刘沛 |
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| 作者单位： | 华中科技大学,电气与电子工程学院,湖北省,武汉市,430074;华中科技大学,电气与电子工程学院,湖北省,武汉市,430074;华中科技大学,电气与电子工程学院,湖北省,武汉市,430074 |
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| 摘 要： | 提出了一种基于数学形态学的能在噪声背景下有效应用的超高速方向保护算法。基于形态开闭运算的滤波器可有效滤除暂态行波中的噪声干扰,在完成滤波后,通过多分辨形态梯度(Multi-resolution Morphological Gradient,MMG) 表现出电流电压行波信号的突变特征,通过瞬时功率判据可得到故障方向。建立EMTP典型500kV线路模型进行仿真, 结果表明该判据能在强噪声背景下正确判断出故障方向。
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| 关 键 词： | 数学形态学 超高速方向保护 行波 多分辨形态梯度 电力系统 |
| 文章编号： | 1000-3673(2005)21-0075-06 |
| 修稿时间： | 2005年5月12日 |
An Ultra-High-Speed Directional Protection for Power Transmission Line Based on Mathematical Morphology |
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| ZHAO Qing-chun,ZOU Li,LIU Pei.An Ultra-High-Speed Directional Protection for Power Transmission Line Based on Mathematical Morphology[J].Power System Technology,2005,29(21):75-80. |
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| Authors: | ZHAO Qing-chun ZOU Li LIU Pei |
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| Abstract: | A criteria, which is based on mathematical morphology (MM) and can be effectively applied to ultra-high speed (UHS) directional protection against the noise background, is proposed. The filter, based on the combination of morphological opening and closing operation, can effectively filtrate the noise interference in the transient travelling waves. After the filtration is completed the abrupt change features of both current and voltage travelling wave signals can be represented by multi-resolution morphological gradient (MMG). Then the direction of fault can be determined by the criteria of instantaneous power. To validate the feasibility and efficiency of the proposed UHS directional protection algorithm, a typical 500kV transmission line model is built up by EMTP, the simulation results show that the proposed algorithm can correctly determine the direction of fault under the condition of strong noise background. |
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| Keywords: | Mathematical morphology Ultra-high-speed directional protection Travelling wave Multi-resolution morphological gradient Power system |
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