【摘要】 局部放电信号是非平稳性信号,具有时变频率。时频分析是分析和处理非平稳时变信号的有力工具,将时频分析技术应用于局部放电信号的分析与处理,能清楚地揭示信号的时变频谱特性,有利于对信号的特征提取,为局部放电信号的模式识别提供了一个更为准确、可靠的新方法。更多还原

【Abstract】 Partial discharge signal is non-stable signal and its frequency changes with time changes.The analysis and processing of time-frequency is a practical tool to the non-stable signal and its application in partial discharge signal analysis can clearly reveal the change of the signal on the time-frequency plane and is effective for choosing suitable parameters and extracting signals,thus offering a new,accurate and reliable method for pattern recognition of partial discharge signals.更多还原