一种基于派克变换的电压跌落检测改进离散算法

以派克变换为基础,提出一种数字化的实时检测电压跌落的新算法,用复化积分提高检测直流分量的计算精度,该方法不仅能实时检测电压跌落的幅值、持续时间和相位跳变信息,还能实时提供动态电压恢复器所需的电压补偿指令信号。采用Matlab对电压跌落检测算法进行仿真。仿真结果表明该方法检测结果稳定,具有很高的计算精度。

An improved discrete method for detecting voltage sag based on Park transformation

This paper proposes a new digital real-time method which is used to detect voltage sags based on Park transformation. With complex integral algorithm, the accuracy of direct current component detecting will be improved. It can not only detect the amplitude and duration and phase jump information of voltage sags, but also provide the needed compensation command signal for dynamic voltage restorer. Matlab is adopted to simulate the algorithm of detecting voltage sags. The simulation result indicates that the method is stable in detecting voltage sags and possesses very high calculation accuracy.