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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。
At present, the AC power system is gradually applied to the new multi-aircraft (MEA). The traditional active filter can not meet the requirement of wide input frequency variation. Therefore, it is necessary to design an active filter. In this paper, a new type of series hybrid active power filter (SHAPF) which is applied in aviation inverter power system is studied. The active filter is directly compensated according to the fundamental current, and it can suppress harmonics well for various frequency inputs Wave effect. The principle of frequency-variable harmonic suppression of this new type of SHAPF is discussed. The detailed design process of the control system is given, including the design of control platform based on dual digital signal processor (DSP) and the algorithm of dynamic detection of fundamental current Finally, a prototype experiment was carried out to compare the experimental waveform and harmonic analysis of the system input current before and after adding the filter. After adding the filter, the total harmonic distortion (THD) of the input current of the system changed from 174.00% to 4.80% and the filtering effect was good The filter experiments at different input frequencies of 360 Hz, 400 Hz and 720 Hz were carried out to verify that the system has good control performance under wide frequency conversion input conditions and meets the input power factor correction requirements of aviation frequency conversion input.