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主要讨论了解决零模行波波头定位的问题。由于零模衰减严重 ,波头比较光滑 ,因而使用离散小波变换无法定位零模波头。文中将连续小波变换应用于定位零模波头中。在理论分析的基础上 ,得出了利用连续小波变换定位零模波头时小波基和小波变换尺度的选择原则。利用该原则的小波变换可以有效地定位零模波头。EMTP仿真证明了利用基于该原则的小波变换可以准确定位零模波头。
Mainly to solve the problem of locating zero-mode traveling wave head. Due to the serious zero-mode attenuation, the wave head is relatively smooth, so the use of discrete wavelet transform can not locate the zero-mode wave head. In this paper, the continuous wavelet transform is applied to locate the zero-modulus wave head. On the basis of theoretical analysis, the principle of choosing wavelet scale and wavelet transform scale when using CWT to locate zero-modulus wave-head is obtained. Using this principle of wavelet transform can effectively locate the zero-mode wave header. EMTP simulation proves that using the wavelet transform based on this principle can accurately locate the zero-mode wave header.