基于瞬时负荷统计特性检测电能质量扰动源

Detection of power quality disturbance based on statistical characteristics of instantaneous load

提出一种基于检测点产生的瞬时负荷统计特性快速确认扰动源的方法,展示了该原理在谐波、电压凹陷、电压膨胀、瞬间电压降落四种扰动,在MATLAB下的仿真和计算结果。结果表明在每种情况下此方法都可以对扰动源进行迅速准确的检测。同时还对每种情况计算电压与实际电压的偏离程度进行了分析,并求出了各种情况下的电压偏离方差。最后,根据扰动源产生原因对扰动源类型的识别进行了研究。

This paper provides a new method for fast qualitatively detecting the disturbance sources, which is based on their statistical instantaneous characteristics. There are four examples imitated under MATLAB including harmonics, voltage sag, voltage swell, short-time transform of voltage dip. The results indicate that this new method can detect the disturbance sources accurately. This paper also analyses the disturbed degree of voltage of every disturbance sources and their disturbed deviation and the methods to identify every kind of disturbance sources and classify their causes.This program is supported by National Natural Science Foundation of China(No.5017702)