并联型直流有源电力滤波器可以有效抑制高压直流输电线路谐波,但该滤波器对其控制系统的性能要求也较高。文中采用输电电流高增益反馈控制方法作为控制策略,并依此方法确定了各项设计参数。同时,针对该控制方法的要求基于数字信号处理器(DSP)和现场可编程门阵列(FPGA)设计了一套控制器装置。该装置通过锁相环实现了同步采样和控制。该方法既提高了谐波检测准确度,又能使数字滤波处理的通带频率自动跟踪系统频率变化。该装置实现了一种具有较小相移的脉宽调制模块,保证了谐波抑制性能和滤波系统的稳定。基于该控制系统的样机实验获得了良好的谐波抑制效果。 Parallel DC Active Power Filter can effectively suppress the HVDC transmission line harmonics, but the filter of its control system performance requirements are higher. In this paper, the transmission current high-gain feedback control method is used as a control strategy, and in accordance with this method to determine the design parameters. At the same time, a set of controller devices based on digital signal processor (DSP) and field programmable gate array (FPGA) is designed for the control method. The device through the phase-locked loop to achieve synchronous sampling and control. The method not only improves the accuracy of harmonic detection, but also makes the passband frequency of digital filtering automatically track the change of system frequency. The device realizes a pulse-width modulation module with smaller phase shift, which ensures the harmonic suppression performance and the stability of the filter system. Based on the prototype of the control system, good harmonic suppression was obtained.