It is found out that the gradient of the front traveling wave caused by in area fault is higher and it contains more high frequency components than that caused by out area fault.
在文 (一 )的基础上 ,详细分析了输电线路内部、外部故障时暂态电流的特征 ,发现内部故障时第一个行波电流的波头陡度大 ,并且其后的部分含有高频分量 ;而区外故障时第一个行波波头的陡度较小 ,且其后的部分高频含量少。
Terrain undulation which is of the high frequency component of the geoid hom owave may be treated as a sort of noise adhered to Gravity.
通过分离高频短波分量 (由地形变化引起 ) ,对中、长波分量作二次解析模拟 ,利用广义最小二乘法进行高程异常值估计 ,将估计出的高强异常值加上用物理方法测定的高频分量即得地面点的高程异常值 。
If there is high frequency component in the voltage signal, the transient process is caused by lightning stroke.
检测到的母线电压进行S变换,提取S变换时频等值线和幅值包络向量,根据是否含高频分量和等值包络向量的修正一阶中心矩的正负,直观准确地实现类型识别,并对特征提取和识别算法进行研究。
By using the wavelet multiresolution technology,the sys- tem signal is decomposed in different levels,and the high frequency part of the signal is obtained.
利用小波多分辨率分析技术对信号进行多尺度小波分解,得到信号的高频分量,对此高频分量进行软阈值去噪和特征提取,可以得到反映系统故障的特征,实现对系统的故障检测,并可根据阈值大小的不同实现故障的区分。
By using the wavelet multiresolution technology, the system signal is decomposed at different levels, the high frequency part of the signal is obtained through soft threshold denoising, the features of the fault signal are acquired and the fault is detected.
利用小波多分辨率分析技术对信号进行多尺度小波分解,得到信号的高频分量,对此高频分量进行去噪和特征提取,可以得到反映系统故障的特征,实现对系统的故障检测,并可根据阈值大小的不同区分故障程度,实现对不同故障的区分。
