基于改进S变换技术的轧钢厂电机电压检测方法

由于电压暂降补偿方法是准确获取电压暂降的主要特征,基于深入分析电压暂降问题,将改进的S变换技术用于电压特征检测,提出一种新的电压暂降特征检测方法。该方法在介绍S变换的基本原理基础上,提出改进的S变换技术,进而提出基于改进S变换技术的电压暂降特征检测方法和实现步骤。以达州钢铁集团轧钢厂感应电动机为研究对象,利用改进的S变换技术,计算电机电压暂降幅值、相位跳变和持续时间等特征向量。通过大量的仿真实验,结果表明提出的电压检测方法具有计算量小、准确度高、抑制噪声干扰效果好等优点。

A voltage detection method of motor in steel rolling mill based on improved S-transform

In allusion to voltage compensation method for solving voltage sag problems, a voltage characteristics detection method based on improved S-transform is proposed in this paper. The main principle of S-transform is expatiated and the S-transform formula of discretization is deduced firstly. The method, step and content of voltage characteristics detection method is proposed in detail. Motor in steel rolling mill of Dazhou Iron&Steel Group is regarded as studying object, the improved S-transform technology is used to compute the voltage characteristics. The simulation results show that the proposed method is simple and effective. The proposed voltage detection method is higher accuracy, robust against noises and harmonic interferences.