多重采样在APF数字控制中的应用研究

有源电力滤波器(APF)控制器的主要功能是跟踪谐波电流指令,对控制器的稳态误差在较大频率范围内都有很高的要求.通常在采用数字控制的系统中,提高采样频率有助于提高系统的性能,采样频率越高,离散控制器与模拟控制器的性能越接近.多重采样在提高采样频率的同时,并不要求提高载波频率和开关频率,可以应用在高带宽场合.实验结果表明,采用多重采样后,相比于传统采样方式,APF的补偿性能有了明显提高.

The Application of Multisampling in APF Digital Control

Since the APF controller is designed to track the harmonics,it should have perfect performance in wide frequency range.Generally speaking,raising the sampling rate can enhance the performance of the system.The faster the sampling rate is,the closer the performance of the digital controller is to that of the analog controller.Multisampling can faster the sampling rate without raising the carrier frequency at the same time.So it can be made good use of.To weaken the bad effect of the digital process,we can us...