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基于Prony与形态学的综合小电流接地选线算法研究

发表时间:2010-07-31  浏览量:1009  下载量:366
全部作者: 刘奇,任建文,李志
作者单位: 华北电力大学电气与电子工程学院
摘 要: Prony算法是用一组衰减余弦信号来估算原始信号的方法,可以分析出信号的幅值、相位、衰减因子、频率4个要素,非常适合暂态信息的处理,但对噪声敏感。提出利用组合形态滤波器对选线数据进行滤波预处理,最大限度地去除噪声对选线的影响,然后采用Prony算法来提取故障零序电流的谐波分量,比较其相位和幅度,正确选线。理论分析及仿真实验表明,该方法可以准确可靠地确定故障线路。
关 键 词: 电力系统及其自动化;小电流接地系统;单相接地故障;Prony算法;形态滤波
Title: A new feeder selection algorithm for neutral indirectly grounded system based on Prony and morphological filter
Author: LIU Qi, REN Jianwen, LI Zhi
Organization: School of Electrical & Electronic Engineering, North China Electric Power University
Abstract: Prony algorithm is a method in which a set of linear combination of exponential components are used to fit the uniformly spaced sampling data. With the algorithm, the amplitude, phase, damping and frequency of the signal can be analyzed. It is suitable for the handing of transient information, but is noise�sensitive. The combined morphological filter is developed to filter noise in transient zero�sequence voltages and currents in order to reduce the impact of noise on the selection, and then the fault line could be detected by comparing the amplitude and phase of that. Theoretical analysis and simulation results show that the proposed method can detect the fault line reliably and exactly.
Key words: electrical power system and its automation; neutral indirectly grounded system; single�line to ground fault; Prony method; morphological filter
发表期数: 2010年7月第14期
引用格式: 刘奇,任建文,李志. 基于Prony与形态学的综合小电流接地选线算法研究[J]. 中国科技论文在线精品论文,2010,3(14):1469-1473.
 
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