| 基于多尺度形态分解的特高压线路雷击干扰识别新方法 |
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| 引用本文： | 赵军,吕艳萍,王汉广. 基于多尺度形态分解的特高压线路雷击干扰识别新方法[J]. 高电压技术, 2009, 35(5): 994-998 |
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| 作者姓名： | 赵军 吕艳萍 王汉广 |
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| 作者单位： | 武汉大学电气工程学院,武汉,430072;湖北省电力勘测设计院,武汉,430024 |
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| 摘 要： | 基于暂态量的超高速输电线路保护方案动作时间短,能很好地满足特高压输电线路对保护速动性的要求,但它易受雷击干扰的影响,从而造成误动作。为了解决该问题,提出了一种基于数学形态学的特高压输电线路雷击干扰与故障识别的新方法。通过对电流暂态信号进行多尺度形态学分解,提取特定高、低频段上的谱能量,并用这两个谱能量的比值构成判据,实现雷击干扰与故障状态的识别,大量EMTP仿真试验表明了该方法的正确性。作为辅助判据,与线路的暂态保护结合,将有效提高特高压输电线路保护的可靠性。
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| 关 键 词： | 特高压 输电线路 多尺度形态分解 雷击干扰 谱能量 辅助判据 |
New Scheme to Identify Lightning Disturbance for the UHV Transmission Lines Based on Multi-scale Morphology Decomposition |
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| ZHAO Jun,LV Yan-ping,WANG Han-guang. New Scheme to Identify Lightning Disturbance for the UHV Transmission Lines Based on Multi-scale Morphology Decomposition[J]. High Voltage Engineering, 2009, 35(5): 994-998 |
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| Authors: | ZHAO Jun LV Yan-ping WANG Han-guang |
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| Affiliation: | 1.School of Electrical Engineering;Wuhan University;Wuhan 430072;China;2. Hubei Electric Power Survey&Design Institute;Wuhan 430024;China |
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| Abstract: | The application of ultra-high-speed protection based on transient components well meets the requirements of the UHV transmission lines' protection due to its speedy operation. But it may mal-operate in case that lightning strokes on transmission lines. In order to solve the problem,we proposed a new method to identify lightning disturbance for the UHV transmission lines based on mathematical morphology. The multi-scale morphology decomposition was used to extract the spectrum energy from the high and low fr... |
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| Keywords: | UHV transmission lines multi-scale morphology decomposition lightning disturbance spectrum energies auxiliary criterion |
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