伍红文,郭敏,邹建明,李强,陈智广,陈骏,张志辉.电压暂降在时域和变换域中的检测算法综述[J].电测与仪表,2021,58(8):1-10. Wu Hongwen,Guo Min,Zou Jianming,Li Qiang,Chen Zhiguang,Chen Jun,Zhang ZhiHui.Review on detection algorithm of voltage sag in time domain and time-frequency domain[J].Electrical Measurement & Instrumentation,2021,58(8):1-10.
电压暂降在时域和变换域中的检测算法综述
Review on detection algorithm of voltage sag in time domain and time-frequency domain
As an important indicator of power quality, how to accurately and quickly identify the voltage sag characteristic quantity information is the key issue for the situation of large-scale access to voltage sag sensitive load in power systems. This paper starts with the concept and characteristics of voltage sag and explains the different voltage sag detection methods in the time domain and transform domain. Methods based on time domain such as the RMS detection method, residual voltage detection method, two-point detection method and d-q coordinate component detection method are analyzed in detail considering their timeliness, stability and practicability. Wavelet transform, short-time Fourier transform and other methods in transform domain are also included. Finally, typical strategies in both time domain and transform domain are selected for simulation analysis. The simulation results are consistent with the theoretical results. Finally, this paper gives a brief summary of the main detection methods listed in the paper.
