作　　者： (邹嘉丰）; (施火泉）; (杨磊）;

机构地区： 江南大学物联网工程学院,无锡214122

出　　处： 《电子测量技术》 2017年第8期116-119,124,共5页

摘　　要： 电压闪变是电能质量的重要指标之一,而闪变测量首先需要提取闪变调幅波。提出使用改进的TeagerKaiser能量算子方法提取闪变调幅波,该方法只需对检测信号的3个采样点进行简单的基本运算,使得提取闪变调幅波的过程快速、简洁。同时,为减少白噪声对算法检测精确度的影响,提出了改进的小波阈值去噪方法,对采集的电信号进行去噪,并通过仿真试验证明所提方法能够准确有效地检测电压闪变的调幅波。该方法克服噪声对电能质量检测的影响,并具有较高精度,易于实现。 Voltage flicker is one of theimportant indicators of power quality,and test flicker first need to extract flicker amplitude modulator. Presents an improved Teager-Kaiser energy operator method to estimate voltage flicker amplitude modulation wave,this method only needsthe three sampling points of the detection signal with simple basic operation, the process of the flicker amplitude wave extraction is fast and simple. Furthermore, to get accurate detection results under white noise, wavelet threshold denoising was applied, to eliminatethe noise ofelectrieal signals. The simulation resultsprove the accuracy and validityof the proposed method. The algorithmcan overcome the influence of noise on power quality detection, has high precision, and easy to implement.

关 键 词： 电压闪变 能量算子 调幅波 小波 去噪