一种基于波形变换的电力系统谐波新的检测方法

电力系统的谐波是供电质量的重要指标,在有源电力滤波器中谐波的检测是关键。如何通过技术手段,在电压和电流信号中提取基波和相关谐波一直是研究和探讨的重要问题。基于瞬时无功功率的谐波检测和基于神经元的自适应谐波检测是其主流方法,算法的难易、算法的速度、检测的精度、软件和硬件的成本等方面还在不断改进中。该文通过对电力系统的有关谐波检测方法的研究,提出一种新的谐波检测和分析方法———基于波形变换的电力系统谐波的检测方法,旨在应用于有源电力滤波器中,理论和仿真实验都证明此方法的正确可行,并且简单易于实现,有广阔的应用前景。

A New Detecting Method of Harmonies in Power System Based on Wave Transformation

Harmonics in power system is important index of power supplying quality,and in active power filter,the key is to detect harmonics.How to pick up the elementary frequency and corresponding harmonics in voltage and current is a significant issue being researched and discussed for a long time.Detecting harmonics based on instantaneous reactive power and the adaptive detection method on neural network are the main methods.In order to get an easy algorithm,a higher speed and accuracy detection method and a lower cost of software and hardware are being sought.Relying on the research of detecting methods of related harmonics in power system,a new method of detecting and analyzing harmonics is provided in this paper——detecting method of harmonics in power system based on wave transformation,aiming to apply into active power filter.Through the theoretical analysis and simulation test,it is proved that this method is feasible as well as simple to realize,and has a wide application prospect.