Communication links, as a part of coordinated control in dc microgrids (MGs), play an essential role in achieving high operational performance. In this article, a bipolar topology based on series modular structure of dc MG is designed, and a complementary dual-window dc bus interacting (CDBI) method which combines droop control with antidroop control is proposed to improve the robustness of system and against communication failure. In the proposed CDBI method, distributed generations regard dc buses as common communication channels for information exchange, and the coordinated control within the dc MGs can be realized through predesigned sequences of voltage pulses without extra communication links. Finally, the proposed symmetrical bipolar structure and communication-free coordinated control scheme have been verified in various cases through rapid control prototype. The experimental results show that the bipolar-type dc MG controlled by the proposed CDBI method can supply high-quality power for a long time even in the case of communication failure.

中文翻译：

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双极型直流微电网的互补双窗口直流母线交互方法

通信链路作为直流微电网 (MG) 协调控制的一部分，在实现高运行性能方面发挥着重要作用。本文设计了一种基于直流MG串联模块化结构的双极拓扑结构，提出了一种下垂控制与抗下垂控制相结合的互补双窗口直流母线交互（CDBI）方法，以提高系统的鲁棒性和抗通信故障的能力。 . 在所提出的 CDBI 方法中，分布式发电将直流总线视为信息交换的公共通信通道，并且可以通过预先设计的电压脉冲序列来实现直流 MG 内的协调控制，而无需额外的通信链路。最后，所提出的对称双极结构和无通信协调控制方案已通过快速控制原型在各种情况下得到验证。实验结果表明，所提出的CDBI方法控制的双极型直流MG即使在通信故障的情况下也能长时间提供高质量的电力。