并联有源电力滤波器补偿容性负载谐波放大抑制研究

针对并联型有源滤波器在补偿容性负载时出现的谐波放大现象进行了研究，在分析电容滤波型负载的基础上，建立了有源电力滤波器补偿容性负载的简化模型，依据该模型分析了负载中容性元件的电容值与谐波电流放大之间的关系，为了克服谐波放大现象，采用了基于快速傅立叶变换(FFT)的有选择谐波补偿方法使得系统在谐振频率处变为开环控制，使系统稳定。最后利用实际的办公楼负载进行了实验验证。
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.
关键词﹕电力谐波；有源电力滤波器；谐波放大；快速傅立叶变换
Keywords: power harmonic; active power filter; harmonic amplification; fast fourier transformation