基于Dyn测度的电压暂降检测方法

针对电压暂降检测的实时性要求，提出了一种基于Dyn测度的电压暂降检测方法。Dyn测度算法能够快速检测信号的所有极值点，并计算各极值点的Dyn测度。而基于Dyn测度的检测方法根据信号畸变点的Dyn测度和信号峰谷点的Dyn测度差异可以识别信号的畸变点，准确定位电压暂降的发生时刻。文中应用该方法对实测大容量电动机启动引起的电压暂降、变压器投切引起的电压暂降和短路故障引起的电压暂降分别进行测试，并与其他检测方法的结果进行了比较。结果表明文中提出的电压暂降检测方法是有效、可行的，完全满足实时性要求。

A DYNAMICS-BASED METHOD FOR VOLTAGE SAGS DETECTION

In order to meet the real time requirements, a new method for detection of voltage sags is presented, which is based on the Dynamics. The Dynamics algorithm can detect all the extreme of the signal and compute these dynamics quickly. As the Dynamics of distortion point are vast different from that of the peak or valley point, the suggested method can detect the distortion point effectively. The measurements of voltage sags caused by the large motor starting, transformer energizing and three-phase-ground fault are analyzed by the new method. The results show that the method can accurately detect voltage sags, and is feasible and effective.