A Distributed Fixed-Time Secondary Controller for DC Microgrids
A Distributed Fixed-Time Secondary Controller for DC Microgrids
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DOI：
10.1109/icems.2019.8921723
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发表时间：
2019-08
期刊：
影响因子：
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通讯作者：
Rui Huang;Panbao Wang;Mohamed Zaery;Wang Wei;Dianguo Xu
中科院分区：
文献类型：
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作者：
Rui Huang;Panbao Wang;Mohamed Zaery;Wang Wei;Dianguo Xu
针对传统下垂控制的缺点，提出了一种基于固定时间的分布式直流微网二次侧控制器。该控制器基于分布式定时控制方法，能够在固定时间内同时消除直流电压偏差和提供比例电流分配。与传统的集中式次级控制器相比，该控制器采用动态一致性，每个变换器只与通信图上的相邻变换器通信，提高了收敛速度，改善了性能。在PLECS中对所提出的控制策略进行了仿真，以测试控制器的性能、链路故障恢复能力、即插即用能力以及在不同时延下的可行性。
This paper proposes a distributed fixed-time based secondary controller for the DC microgrids (MGs) to overcome the drawbacks of conventional droop control. The controller, based on a distributed fixed-time control approach, can remove the DC voltage deviation and provide proportional current sharing simultaneously within a fixed-time. Comparing with the conventional centralized secondary controller, the controller, using the dynamic consensus, on each converter communicates only with its neighbors on a communication graph which increases the convergence speed and gets an improved performance. The proposed control strategy is simulated in PLECS to test the controller performance, link-failure resiliency, plug and play capability and the feasibility under different time delays.