Distributed Self-Triggered Control for Frequency Restoration and Active Power Sharing in Islanded Microgrids
Distributed Self-Triggered Control for Frequency Restoration and Active Power Sharing in Islanded Microgrids
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DOI：
10.1109/tii.2023.3240738
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发表时间：
2023-10
影响因子：
12.3
通讯作者：
Yulin Chen;Keng-Weng Lao;Donglian Qi;Hongxun Hui;Shaohua Yang;Yunfeng Yan;Yi Zheng
中科院分区：
文献类型：
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作者：
Yulin Chen;Keng-Weng Lao;Donglian Qi;Hongxun Hui;Shaohua Yang;Yunfeng Yan;Yi Zheng
分布式事件触发的微电网二次控制已被广泛研究，以提高系统效率。但大多数都是基于连续触发状态监测，这又增加了系统的计算负担。为此，本文提出了孤岛微电网频率恢复控制和有功共享控制的分布式自触发算法解决方案。与事件触发控制方案不同的是，在我们的自触发方案中，每个分布式发电机都配备了一个局部算法，使其能够根据前一个触发时刻的状态预先计算下一个触发时刻。我们的出发点是设计一个具有新的估计误差的触发条件。然后，通过求解基于触发条件建立的二次方程来确定下一个触发时刻，而不是连续监测触发条件。理论分析和仿真结果表明，所提出的分布式自触发二级控制器可以大大降低通信和计算成本。
Distributed event-triggered secondary control in microgrids has been widely investigated to improve system efficiency. But most of them are based on consecutive triggering condition monitors, which would in turn increase the computation burden of the system. To this end, this article presents distributed self-triggered algorithmic solutions to the frequency restoration control and active power sharing control of islanded microgrids. Different from event-triggered control schemes, in our self-triggered solutions, each distributed generator is equipped with a local algorithm that enables it to pre-compute the next triggering time instant according to the states at the previous one. Our starting point is to design a triggering condition with a novel estimate error. Then, the next triggering time instant is determined by solving a quadratic equation established based on the triggering condition, rather than monitoring the triggering condition consecutively. Theoretical analysis and simulation results show that the proposed distributed self-triggered secondary controllers can highly reduce the communication and computation costs simultaneously.