This article proposes an observer-based event-driven fault-tolerant (OBEDFT) secondary control strategy for AC microgrids (MGs) to achieve load voltage regulation. First, the input-output feedback linearization method transforms the voltage regulation issue into an output feedback tracking problem for linear multiagent systems (MASs) with nonlinear dynamics. This transformation provides the necessary preprocessing for load voltage regulation. Then, an OBEDFT secondary control protocol that considers full-state immeasurability is proposed. The actuators of distributed generators (DGs) may experience partial loss of effectiveness (PLOE) and bias faults, and these fault parameters may be heterogeneous and time-varying. The protocol introduces adaptive techniques to avoid information related to fault parameters while using event-driven mechanisms to achieve discrete measurements of neighboring DG. Additionally, the protocol uses boundary layers to construct smooth controllers that prevent the chattering effect caused by nonsmooth controllers. Finally, simulation results confirm the effectiveness of this load voltage regulation strategy.

中文翻译：

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基于分布式多主体事件驱动的孤岛微电网容错控制。

本文提出了一种基于观测器的事件驱动容错（OBEDFT）的交流微电网（MG）二次控制策略，以实现负载电压调节。首先，输入输出反馈线性化方法将电压调节问题转化为具有非线性动力学的线性多智能体系统（MAS）的输出反馈跟踪问题。这种转换为负载电压调节提供了必要的预处理。然后，提出了一种考虑全状态不可测性的OBEDFT二次控制协议。分布式发电机（DG）的执行器可能会出现部分效能损失（PLOE）和偏差故障，并且这些故障参数可能是异构的且随时间变化的。该协议引入了自适应技术来避免与故障参数相关的信息，同时使用事件驱动机制来实现相邻 DG 的离散测量。此外，该协议使用边界层来构造平滑控制器，以防止非平滑控制器引起的颤振效应。最后，仿真结果证实了该负载电压调节策略的有效性。