Distributed Optimal Synchronization Rate Control for AC Microgrids Under Event-Triggered Mechanism
Distributed Optimal Synchronization Rate Control for AC Microgrids Under Event-Triggered Mechanism
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DOI：
10.1109/tpwrs.2020.3035688
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发表时间：
2021-05
影响因子：
6.6
通讯作者：
Chang Yu;Hong Zhou;Xiaoqing Lu;Jingang Lai;Guoping Liu
中科院分区：
文献类型：
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作者：
Chang Yu;Hong Zhou;Xiaoqing Lu;Jingang Lai;Guoping Liu
随着分布式发电技术的发展，小容量、低惯量的分布式能源在孤岛式交流微电网中的渗透率越来越高。这突出了对次级控制策略的需要，以补救频率偏差和频率同步速率的强烈限制，这与初级控制相关联。为了解决这个问题，一个最佳的条件，在显式同步率公式。然后，提出了一种分布式事件触发控制策略，以同步微电网频率的标称值和最大化的同步率的主要控制过程。为了减少通信和计算负担，事件触发机制，使每个代理更新其输入的基础上，只有一个邻居的离散信息提供。利用李雅普诺夫方法分析了事件条件和事件区间的稳定性。最后，将理论结果应用于由14个DG组成的并联馈线测试系统，验证了所提策略的有效性。
With the development of distributed generation (DG) technologies, distributed energy resources (DERs) with low capacity and low inertia are highly penetrated in the islanded AC microgrid. This has highlighted the need for secondary control strategies to remedy frequency deviation and strongly limitation of the frequency synchronization rate, which are associated with the primary control. To solve this problem, an optimal condition, in terms of explicit synchronization rate formula, is derived. Then, a distributed event-triggered control strategy is proposed to synchronize the microgrid frequency to the nominal value and maximize the synchronization rate for the primary control process. To reduce the communication and computation burdens, an event-triggered mechanism that enables each agent to update its input based on discrete information from only one of its neighbors are provided. The stability of the event condition and event interval are also analyzed using Lyapunov method. Finally, the theoretical results are applied to a parallel-feeder test system consisting of fourteen DGs, which verifies the effectiveness of the proposed strategy.