DC-link current ripple is one of the important factors for operating the current-source converter. In practice, the dc-link current ripple can be reduced by increasing the switching frequency or inductance. However, it may result in the higher switching losses, larger size, or higher cost. In order to deal with this problem, the inherent limitation of the conventional solution is discussed in this paper. The time-domain equation of the dc-link current is established for the first time. And then, a new space vector control strategy is proposed to reduce the ripple with no need of increasing the switching frequency or inductance. The space vector is divided into 12 sectors, where the dc-link current ripple can be effectively reduced by the optimal vector sequence. Finally, the proposed method is implemented on the TMS320F28335DSP + XC3400FPGA digital control hardware platform. The experimental results verify the effectiveness of the proposed strategy.

中文翻译：

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用于减少直流链电流纹波的电流源转换器的最优空间矢量调制


直流母线电流纹波是电流源转换器运行的重要因素之一。实际上，可以通过增加开关频率或电感来减少直流母线电流纹波。然而，这可能会导致更高的开关损耗、更大的尺寸或更高的成本。为了解决这个问题，本文讨论了传统解决方案的固有局限性。首次建立了直流母线电流的时域方程。然后，提出了一种新的空间矢量控制策略来减少纹波，而无需增加开关频率或电感。将空间矢量分为12个扇区，通过最优矢量序列可以有效降低直流母线电流纹波。最后，在TMS320F28335DSP+XC3400FPGA数字控制硬件平台上实现了该方法。实验结果验证了所提出策略的有效性。