期刊论文

Wave Correlation Analysis Based Transient Protection Method for Transmission Lines

中文

电力系统及其自动化学报

1003-8930

2018

30

8

44-50

10.3969/j.issn.1003-8930.2018.08.008

国家自然科学基金资助项目(51577013) 湖南省自然科学***基金资助项目(2015JJ1001) 电网安全监控技术教育部工程研究中心开放基金资助项目(2018A005)

本校为第一机构

针对现有暂态保护方法可靠性不高的现状,提出了一种基于波形相关性分析的暂态保护新方法。该方法根据故障产生的宽频带暂态信号的波形特征实现输电线路故障暂态保护。当输电线路发生故障后,采集故障暂态波形并提取幅值、相位等波形特征;利用波形相关性方法,将暂态信号波形与样本数据库中的波形进行相关性分析,计算波形相关系数;根据波形相关系数来判别区内外故障,实现线路故障快速保护。仿真分析结果表明,该保护方法综合利用宽广频带暂态信号的时域特征与频域特征,可消除单一使用暂态信号时域或频域的局部故障特征信息导致的缺陷,有望显著提高暂态保护的可靠性。

To solve the problem of poor reliability when using the existing transient protection method,a novel transient protection method based on waveform correlation analysis is proposed in this paper,which can realize the transient pro-tection of transmission lines under fault according to the waveform characteristics of broadband transient signals generated due to fault. When a fault occurs on the transmission lines,the fault transient waveforms are collected to extract char-acteristics,such as amplitude and phase;then,the correlation analysis for the waveforms of transient signals and those from a...