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电力系统超高速保护的形态学—小波综合滤波算法 预览 被引量:77

A NOVEL INTEGRATED MORPHOLOGY-WAVELET FILTER ALGORITHM USED FOR ULTRA-HIGH SPEED PROTECTION OF POWER SYSTEMS
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摘要 提出了一种用于电力系统超高速保护的形态学(小波综合滤波算法.该算法着力解决暂态行波中滤除随机噪声和脉冲噪声的困难,利用数学形态学设计的前置滤波单元在有效抑制各种噪声的同时,较好地保持了行波波头的基本形状.小波变换算子则可有效地检测出行波波头并进行精确定位,从而为各种行波保护或暂态保护提供可靠的判据.ATP仿真结果验证了本算法的有效性.同时,该形态学(小波综合算法的计算量较单一的低通滤波器和多尺度小波变换的计算量小,有利于工程实现. A novel integrated morphology-wavelet filter algorithm used for ultra-high speed protection of power systems is proposed in this paper. This algorithm aims to improve the filter performance when such filter is applied to filter the random and pulsed noises contained in the travelling wave. By use of the preset filter unit based on mathematical morphology, the wave-head of the travelling wave is held, meanwhile a variety of noises existing in such travelling wave can be greatly suppressed. Wavelet transform provides such algorithm that the travelling wave head can be detected and accurately located by use of it. On basis of the above integrated filter algorithm, various kinds of protections based on travelling wave or transient component can be implemented. The effectiveness of this algorithm is testified with Simulations based on ATP program. It should be indicated that this integrated morphology-wavelet filter algorithm has less computational complexity than single low-pass filter and multi-resolution waveform transform, which makes it possible to be implemented in industrial product.
作者 林湘宁 刘沛 刘世明 杨春明 LIN Xiang-ning1,2, LIU Pei1, LIU Shi-ming1,2 , YANG Chun-ming2 (1. Huazhong University of Science and Technology,Wuhan 430074,China; (2. Group of DongFang Electronic Information Technology, YanTai 264001, China)
出处 《中国电机工程学报》 EI 北大核心 2002年第9期 19-24,共6页 Proceedings of the CSEE
基金 国家自然科学基金
关键词 暂态保护 电力系统 超高速保护 形态学-小波综合滤波算法 power systems ultra-high speed protection mathematical morphology wavelet transform
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