一种电压暂降改进求导变换检测算法

An Improved Derivative Transform Detection Alogorithm for Voltage Sag

电压暂降问题往往会给高端制造业用户带来巨大损失,对电压暂降的典型特征量实现快速准确检测,是补偿和治理电压暂降的关键。治理电压暂降的关键就在于在利用少量的采样数据快速、准确地检测到电压暂降。为此在dq变换法的基础上,提出一种新型的改进求导变换法,采取不同的方法构造d、q轴电压,这种方法可以显著缩短电压暂降的检测延时,只需要2个采样点,就能够准确检测到电压相位和幅值,在工程中具有良好的使用价值。

Voltage sag problems often bring huge losses to high-end manufacturing users,and the rapid and accurate detection of the typical characteristics of voltage sag is the key to compensating and controlling voltage sag.The key to managing voltage sags is to detect voltage sags quickly and accurately through small amounts of sampled data.In this paper,on the basis of the dq transformation method,a new type of improved derivative transformation method is proposed,which adopts different methods to construct d and q axis voltages,which can significantly reduce the detection delay of voltage sag,and only needs 2 sampling points to accurately detect the voltage phase and amplitude,which has good use value in engineering.