摘要
有源电力滤波器在数据采集和数字化控制系统中不可避免存在延时。根据该延时效应,进行建模仿真和快速傅里叶分析,验证了由于延时引起的谐波放大,提出了有源滤波器谐波最高补偿次数确定依据,从而提高有源滤波器补偿性能。通过设计APF与电网连接的低通滤波器,实现补偿次数的设定,使APF逆变器仅输出最高补偿次数以下的低次谐波,避免了由于延时引起的高次谐波放大,为并联型有源滤波器设计提供有效的指导。
Active power tilter（APF）inevitably exists time delay m the data acquisition ana digital control system. To analyze the time delay effect that can cause harmonic amplification, some related simulation and FFT analysis were done based on time delay. In order to improve the performance of APF, the maximal order of the harmonic was derived, that can be compensated by APF base on the analysis results. By designing an appropriate LPF which connected between the APF and the power system, the APF only needs to compensate the harmonic below the maximal order refer above. This can avoid harmonic amplification caused by the time delay. The conclusion is helpful for shunt APF designing.
出处
《电气传动》
北大核心
2011年第2期23-27,共5页
Electric Drive
关键词
延时
有源电力滤波器
频率补偿
低通滤波器
time delay
active power filter（APF）
frequency compensation
low pass filter（LPF）
