摘要
为准确评估高压断路器操作机构的运行状态,提出一种基于三次样条插值和近似导数法的电流信号特征提取方法。该方法以电流曲线极值点对应的电流和时间参数为特征向量,首先用三次样条插值方法对曲线进行光滑处理,然后采用近似导数法取得可能的极值点,通过分组处理得到信号的特征向量。应用该方法对某断路器的运行状态进行检测,结果表明:该电流特征提取方法简单有效,可实现对高压断路器的故障评估与检测。
In order to evaluate the operating state of the operating mechanism of high voltage circuit breakers accurately,a current signal feature extraction method based on three spline interpolation and approximate slope method is proposed.The method used the current and time parameters corresponding to the extreme point of the current curve as the eigenvector.First,the three spline interpolation method is used to smooth the curve.Then the approximate derivative method is used to obtain the possible extreme value,and the eigenvectors of the signal are finally obtained by the packet processing.Finally,the operation state of a circuit breaker is detected by the proposed method.The experimental results show that the current feature extraction method is simple and effective,and can realize the fault assessment and detection of high voltage circuit breakers.
作者
李聪
周建平
万书亭
LI Cong;ZHOU Jianping;WAN Shuting(Department of Mechanical Engineering,North China Electric Power University,Baoding Hebei 071003,China;State Grid Zhejiang Maintenance Branch Company,Hangzhou 311232,China)
出处
《浙江电力》
2019年第1期98-103,共6页
Zhejiang Electric Power
基金
国家自然科学基金(51777075)
国网浙江省电力有限公司科技项目(5211MR170004)
关键词
高压断路器
线圈电流
三次样条插值
特征提取
high voltage circuit breaker
coil current
cubic spline
feature extraction
