摘要
提出了一种基于半周期离散傅里叶变换(DFT)及重复控制补偿谐波的控制方法。该方法首先利用半周期DFT提取出指定次谐波,并通过比例积分(PI)控制器和重复控制器串联的方式对指定次谐波进行补偿。半周期DFT的指定次谐波电流检测和重复控制算法相结合运用在有源电力滤波器(APF)中,具有检测精度高、易于实现等特点。相较传统DFT方法,该方法节省了处理器的存储空间,降低了系统的运算量。通过实验对5次和7次谐波进行了补偿,验证了该指定次谐波补偿方法的有效性。
A control method based on half cycle discrete Fourier transformation（DFr） and repetitive control to compensate harmonic is proposed.According to the method, specified harmonic firstly is extracted by using the half cycle DFT, and proportional integral（P I） controller and repetitive controller in series are used to compensate the specified har- monics.The harmonic current detecting algorithm by the half cycle DFI＂ and repetitive control are used in active pow- er fiher（APF） which has high precision and easy to implement.Compared with the traditional DFT,the storage space of processor is saved and the detection time of system is reduced.The 5 and 7 harmonics are compensated by experiment and the experimental result shows the effectiveness of specified harmonic compensation.
出处
《电力电子技术》
CSCD
北大核心
2017年第7期62-64,共3页
Power Electronics
关键词
有源电力滤波器
离散傅里叶变换
重复控制
active power filter
discrete Fourier transformation
repetitive control
