基于HHT军用电源逆变器电力谐波检测分析

电能逆变器是军用电源系统的核心,为提高军用电源输出电压电力谐波分析效果,提出改进型希尔伯特-黄变换(HHT)方法的检测分析方法,并设计基于LabVIEW平台的电压谐波检测和分析装置。在研究双闭环控制策略的基础上,针对模态混叠问题,先使用数字滤波器对输出电压信号进行预处理,再进行改进HHT分析,得到输出电压谐波分量的幅频分布,并利用MATLAB对军用电源逆变器模型进行仿真。结果表明该方法可以对军用电源变换器输出谐波分量实时检测和分析,计算精度高,分析效果好,为下一步的谐波抑制方法研究提供有力支持。

Research on Power Harmonic Detection and Analysis for Military Power Inverter Based on HHT

Power inverter is the core of military power system,in order to improve the effect of military power output voltage's harmonic analysis,in this paper a method for harmonic analysis based on optimized HHT is presented and a monitor and analysis device for inverter's harmonic based on LabVIEW is set up. Based on analyzing the double closed loop control method,and for the mode mixing, digital filter is used to preprocess the signal,and then optimized HHT analysis is conducted to get the output voltage amplitude and frequency distribution of harmonic component,in addition,MATLAB software is used to simulate the military power inverter model. The result of experiments indicated that the method gots the parameters of output voltage and harmonic accurately,harmonic is monitored and analyzed in current time,offering strong support for harmonic suppression study in the future.