电力系统谐波检测中数字滤波器的设计

Design of Digital Filter in Harmonic Detection of Power System

由于各种电子设备、非线性负载的接入,使得电力系统产生了越来越多的谐波,严重降低电能质量,进而影响到用电设备和电网的安全使用。分析了目前常用的电力系统谐波检测技术,并针对基于选频的谐波检测技术和瞬时无功功率理论的ip-iq谐波电流检测方法,分析了基于matlab软件的数字滤波器设计方法。结果表明,数字滤波器设计简便,能够较好地用于电力系统谐波检测中。

Due to the access of various electronic devices and nonlinear loads, more and more harmonics are generated in the power system, which seriously decreases the power quality, thus affecting the safe use of electrical equipment and power grid. The common harmonic detection technologies of power system were analyzed. Aiming at harmonic detection technology based on frequency selection and ip-iq harmonic current detection method based on instantaneous reactive power theory, the design methods of digital filter based on MATLAB software are analyzed. The results show that the design of digital filter is simple and can be used in harmonic detection of power system.