应用于航空变频电源系统的新型串沥混合有源滤波器

 目前变频交流(AC)电源系统开始逐渐应用到新型多电飞机(MEA)中，传统有源滤波器无法满足宽输入频率变化要求，为此需要设计一种适合于宽变频航空电源系统的有源滤波器。本文研究了一种应用于航空变频电源系统的新型串联混合有源滤波器(SHAPF)，该有源滤波器直接根据基波电流进行补偿，针对各种频率输入均能起到较好的抑制谐波作用。讨论了这种新型SHAPF的变频谐波抑制原理，给出了该滤波器的控制系统详细设计过程，包括基于双数字信号处理器（DSP）的控制平台设计和逐点动态检测基波电流的算法设计，最后进行了样机实验，对比了加入滤波器前后系统输入电流实验波形和谐波分析，加入滤波器后系统输入电流总谐波失真度（THD）由174.00%变化至4.80%，滤波效果良好；在360 Hz,400 Hz和720 Hz不同输入频率进行了滤波实验，验证系统在宽变频输入条件下均具有良好控制性能，满足航空变频输入时输入功率因数校正要求。

Novel Series Hybrid Active Power Filter Applied to Aeronautic Variable-frequency Power Systems

As variable frequency alternating current (AC) power system grids are presently being applied to the new type of more electric aircraft (MEA), traditional active filters cannot satisfy the requirement of wide frequency variation. Therefore there arises the need for an aeronautic power active filter suitable for wide frequency input. In this article, a novel series hybrid active power filter (SHAPF) for variable frequency AC power systems is introduced which works with fundamental current compensation, and attains better harmonic suppression effect for various input frequencies. The variable frequency harmonic suppression principle is discussed, and the detailed design of the process control system is provided, including the design of a dual digital signal processing (DSP) based controller platform and the point-by-point dynamic detection algorithms of the fundamental current. Finally, experiments are carried out to verify the proposed system. The input current waveforms and harmonic analysis are compared before and after the power filter is added. The input current total harmonic distortion (THD) with power filter changes from 174.00% to 4. 80%, and a good filter effect is displayed. The filter experiments are also performed in conditions of 360 Hz, 400 Hz and 720 Hz input frequencies, and good control performance of the system in the wide range is verified, which can meet the power factor correction requirements under the conditions of aviation variable frequency input.