In this article, a decentralized controller, based on the current mode virtual oscillator, is proposed to control the distributed power filters in dc systems. This communication-free solution only requires local dc bus voltage measurements as its control input. With the proposed control algorithm, the power filters can automatically share the target ripples based on their storage capacities, realizing modular and fault tolerant design. One typical application is that they can be placed on the dc subgrid of a hybrid ac/dc microgrid to attenuate the second-order harmonics from ac side. A frequency adaption mechanism is further embedded within the controller; hence, it can process any ripples at an unknown frequency for more general applications. To eliminate the circulating current caused by the power line dynamics, virtual impedance is employed to modify the feedback voltage measurement of the virtual oscillator. The proposed control algorithm has been verified by both simulation and down-scaled experiments.

中文翻译：

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直流系统中用于选择性纹波衰减的分布式电源滤波器的虚拟振荡器控制

在本文中，基于 当前模式提出了一种虚拟振荡器来控制直流系统中的分布式电源滤波器。这种无需通信的解决方案仅需要本地直流总线电压测量作为其控制输入。利用所提出的控制算法，电源滤波器可以根据其存储容量自动共享目标纹波，从而实现模块化和容错设计。一种典型的应用是将它们放置在交流/直流混合微电网的直流子电网上，以衰减交流侧的二次谐波。频率适配机制还被嵌入控制器中。因此，它可以在未知频率下处理任何纹波，以用于更一般的应用。为了消除由电源线动力学引起的循环电流，采用虚拟阻抗来修改虚拟振荡器的反馈电压测量值。