As large-scale power systems are more and more closely integrated with remote transmission technologies, they are also affected by malicious factors in the cyber and physical layers when bringing convenience. In this article, we propose a novel adaptive event-triggered strategy and apply to the multi-area power system to deal with the load frequency control (LFC) problem with network-induced delay and stochastic sensor faults based on the discrete-time sliding mode control (DSMC) technique. Compared with existing event-triggered strategies, the proposed event-triggered strategy dynamically adjusts the threshold according to system state fluctuations, which can improve the system’s tolerance for sensor faults and reduce the number of transmitted packets. Firstly, a dynamic LFC model combining network-induced delay, sensor faults, adaptive event-triggered strategy and DSMC is proposed by using the analysis method of time-delay system. Then we devise an appropriate discrete-time sliding surface for each subsystem in the networked power systems. The Lyapunov stability theory is used to analyze the asymptotic stability and robustness of each subsystem, and the decentralized controller design method is derived. Finally, some simulation examples are introduced to confirm the effectiveness of the proposed adaptive event-triggered DSMC approach.

中文翻译：

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具有通信延迟和传感器故障的电力系统的事件触发滑模控制

随着大规模电力系统与远程传输技术的结合越来越紧密，在带来便利的同时，也受到网络和物理层恶意因素的影响。在本文中，我们提出了一种新颖的自适应事件触发策略，并将其应用于多区域电力系统，以基于离散时间滑模处理具有网络引起的延迟和随机传感器故障的负载频率控制（LFC）问题。控制（DSMC）技术。与现有的事件触发策略相比，所提出的事件触发策略根据系统状态波动动态调整阈值，可以提高系统对传感器故障的容忍度，减少传输数据包的数量。首先，结合网络引起的延迟、传感器故障、利用时滞系统的分析方法，提出了自适应事件触发策略和DSMC。然后我们为网络化电力系统中的每个子系统设计一个合适的离散时间滑动面。利用李雅普诺夫稳定性理论分析各子系统的渐近稳定性和鲁棒性，推导出分散控制器的设计方法。最后，介绍了一些仿真示例以确认所提出的自适应事件触发 DSMC 方法的有效性。并推导出分散控制器的设计方法。最后，介绍了一些仿真示例以确认所提出的自适应事件触发 DSMC 方法的有效性。并推导出分散控制器的设计方法。最后，介绍了一些仿真示例以确认所提出的自适应事件触发 DSMC 方法的有效性。