一种基于相关算法的电能质量信号定位方法

A new method to locate the signal of power quality based on correlation algorithm

电能质量扰动是目前电能质量研究中的重要问题,快速、准确定位电力系统中暂态电能质量信号是实现电力补偿和电能质量分析的前提。相关算法是时域检测微弱信号中非常有效的算法,其原理简单、容易物理实现,且具有较强的滤波能力,因而具有广泛的用途。文章提出一种基于相关检测的电能质量信号定位方法,能有效定位电能质量信号发生的起止时间。通过比较几种不同的电能质量信号定位方法验证了本方法具有明显的优势。

Power quality disturbances is an important issue in power quality research. It is a premise of electricity compensation and power quality analysis to locate power quality disturbances in power system rapidly and precisely.And correlation algorithm is effective in the detection of weak signals. Its principle is simple and it can be made with no complicated components. Moreover,it＇s capable of filtering noise,making it the most spreading useful tool in signal analysis. A new method has been proposed to locate the signal of power quality based on correlation algorithm in this paper,which could locate the starting and ending time of power quality disturbances effectively. By comparing several locating methods,the effectiveness of the method has been proved.