針對并聯型有源濾波器在補償容性負載時出現的諧波放大現象進行了研究，在分析電容濾波型負載的基礎上，建立了有源電力濾波器補償容性負載的簡化模型，依據該模型分析了負載中容性元件的電容值與諧波電流放大之間的關系，為了克服諧波放大現象，采用了基于快速傅立葉變換(FFT)的有選擇諧波補償方法使得系統在諧振頻率處變為開環控制，使系統穩定。最后利用實際的辦公樓負載進行了實驗驗證。
Abstract: Harmonic amplification phenomenon is studied for shunt active power filter in compensation of harmonic current generated by capacitive loads. Based on the analysis of capacitive load, the model of active power filter with capacitive load is given. The relationship between the capacitor and harmonic current is studied. In order to control the harmonic amplification, fast fourier transformation (FFT) method is used to get the open loop of the resonant frequency. Finally, it is testified in office building load condition.
關鍵詞﹕電力諧波；有源電力濾波器；諧波放大；快速傅立葉變換
Keywords: power harmonic; active power filter; harmonic amplification; fast fourier transformation