Detection algorithm of voltage sag based on sinusoidal model

Voltage sag compensation is ultimate approach to settle voltage sag problems.To compensate voltage sag,fast and exact detection of voltage sag(sag amplitude,time duration,and angle jump)is very important.The detect device should adopt filter for declining the influence of non-based frequency signal.The paper applies the sinusoidal model based algorithm to voltage detection and analyzes the detected results.The Tukey low pass filter is adopted,and the comparison result is given.An improved detection algorithm is employed for voltage sag detection.The simulation results verify the validity of the method.