This study proposes a cooperative secondary voltage and frequency control strategy to reduce the number of controller updates by using an event-triggered approach. The proposed approach is applied to the secondary control that will offset primary control deviations in islanded microgrids with limited computation resources. The controller updating mechanism considered here is event-triggered which judges whether a certain measurement error has reached the event-triggered condition (ETC) associated with the norm of a function with a standard state. We consider two secondary control options to form an ETC, which include a centralized strategy in which an auxiliary controller would collect all agents' states, and a distributed control strategy which only require the neighboring agents information. The corresponding stability and convergence analyses are presented and simulation results for an islanded microgrid test system consisting of four distributed generators (DGs) are provided. The simulation results validate the effectiveness of the proposed control strategies and show that the proposed strategies based on an event-triggered approach can dramatically reduce controller updates.

中文翻译：

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岛状微电网恢复的集中式和分布式次级控制中的事件触发更新方法

这项研究提出了一种协作的次级电压和频率控制策略，以通过使用事件触发方法来减少控制器更新的次数。所提出的方法被应用于次级控制，其将以有限的计算资源来抵消孤岛微电网中的主控制偏差。此处考虑的控制器更新机制是事件触发的，它判断某个测量错误是否已达到与具有标准状态的函数规范相关的事件触发条件（ETC）。我们考虑了形成ETC的两个辅助控制选项，其中包括一个集中策略（在该策略中辅助控制器将收集所有座席的状态）和一个分布式控制策略（该策略仅需要相邻座席的信息）。提出了相应的稳定性和收敛性分析，并给出了由四个分布式发电机（DG）组成的孤岛微网测试系统的仿真结果。仿真结果验证了所提出的控制策略的有效性，并表明基于事件触发方法的所提出策略可以显着减少控制器更新。