摘要
随着科技的发展,用电设备对电能质量的要求越来越高,电压暂降问题越来越受到重视,其中准确的电压暂降检测是治理电压暂降问题的前提。提出采用自适应陷波器结构的滤波功能,结合频率自适应方法,可以准确的检测出频率变化时的相电压的基波信号及其正交信号,从而可以求得电压的幅值和相位信息,达到电压暂降检测的目的。该方法结构简单,抑制谐波影响,适应频率变化,仿真和实验结果均表明,采用自适应陷波器的电压暂降检测方法,可以准确的获得每相电压的电压暂降信息。
With the development of technology, the requirement of electrical equipment for power quality is getting higher.Voltage sag problem receives wider attention, where accurate detection of the voltage sag is the premise of voltage sag compensation.In this paper, the method of employing the filter function of adaptive notch filter structure and frequency adaptive method is proposed to accurately detect the fundamental phase voltage signal and the quadra -ture signal under frequency changes .Thus, the amplitude and phase information of the voltage can be obtained , and the voltage sag detection is achieved .The method is simple, eliminates harmonic influence, and adapts to frequency changes.Simulation and experimental results show that the proposed method can accurately obtain the voltage sag in -formation of each phase.
出处
《电测与仪表》
北大核心
2014年第15期90-93,109,共5页
Electrical Measurement & Instrumentation
关键词
电压暂降
自适应性陷波器
相电压幅值
频率自适应
voltage sag
adaptive notch filter
phase voltage amplitude
adaptive frequency
