基于PC声卡的电网电压波形失真度测量方法  

The Method Based on PC Sound Card to Measure the Distortion Factor of Power Grid Voltage Wave

作　　者：李朝友[1] 

机构地区：[1]天津公安警官职业学院,天津市300382

出　　处：《天津职业院校联合学报》2010年第2期38-41,共4页Journal of Tianjin Vocational Institutes

摘　　要：通过对正弦信号失真度计算公式的描述,提出了一种利用PC声卡测量电网电压波形失真度的新方法,并给出了误差分析。可实现电网电压波形失真度低成本和较高精度测量的目的,具有实际应用的价值。The formulae of computing the distortion factor of sine wave is described,and the method based on PC sound card to measure the distortion factor of power grid voltage wave is put forward,and the error analysis is given.Because of its low cost and higher precision,the method is worth of using in practice.

关 键 词：波形失真 FFT 声卡 同步 

分 类 号：TM935[电气工程—电力电子与电力传动]