基于非线性自适应滤波器的动态电能质量扰动检测  

A Method for Detecting the Dynamic Power Quality Disturbances Based on An Adaptive Nonlinear Filter

作　　者：吕干云[1] 程浩忠[1] 丁屹峰[1] 

机构地区：[1]上海交通大学电气工程系,上海200030

出　　处：《上海电力》2005年第3期231-234,共4页Shanghai Electric Power

摘　　要：在讨论现有一些电能质量检测方法的基础上,提出了一种基于某种非线性自适应滤波器的电力系统动态电能质量扰动检测方法。由于该滤波器输出多个可应用于电能质量扰动检测的信号,且它对于检测系统的内部参数和电力系统频率的变化是鲁棒的,并具有良好的静态和动态性能等特点,非常适合于动态电能质量扰动的检测。阐述了该系统对多种动态电能质量扰动检测的实现和效果,对包括动态谐波、瞬时电压下跌、低频振荡等进行检测和分析,并为此做了大量的计算机仿真,仿真结果证明了结论的正确性。A method for detecting the dynamic power quality (PQ) disturbances in power system is described in this paper, based on an adaptive nonlinear filter. The filter exacts out the fundamental component of the input without phase error, and robust to small change of basic frequency of input. The proposed filter is very suitable for detection of dynamic PQ disturbance. The realizations and effect of the filter for detecting kinds of dynamic PQ disturbance, such as dynamic harmonics, voltage sags and low-frequency oscillation, are analyzed in emphases. The results of computer simulations prove the conclusions above.

关 键 词：动态电能质量扰动 非线性自适应滤波器 动态谐波 瞬时电压下跌 低频振荡 

分 类 号：TM714[电气工程—电力系统及自动化]