奇异值分解和Teager能量算子的电压暂降方法

针对噪声干扰严重影响电压暂降检测分析精度的问题,提出一种采用奇异值分解和Teager能量算子（Teager energy operator,TEO）进行电压暂降检测的改进算法,即采用 Hankel矩阵对电压暂降信号进行奇异值分解法（singular value decomposition,SVD）,从而获得降噪后的供电点上电压暂降近似信号；利用Teager能量算子跟踪该近似信号的瞬时幅值；最后通过仿真算例验证该方法的可行性和有效性。

Voltage Sag Method Based on Singular Value Decomposition and Teager Energy Operator

Aiming at problem of noise disturbance seriously affecting voltage sag detection analysis precision,an improved al-gorithm for detecting voltage sag based on singular value decomposition and Teager energy operator was proposed which was to use Hankel matrix to realize singular value decomposition for voltage sag signal and obtain approximate signal about voltage sag at the point of power supply after denoising.By using Teager energy operator,it was able to trace instantaneous amplitude of this approximate signal.By simulation verification,feasibility and effectiveness of this method was proved.