电力调频系统的信息物理融合建模及其在容错控制中的应用

该文提出一种考虑离散事件系统与连续时间系统融合动态的电力信息物理系统(cyberphysicalpowersystems,CPPS)建模与控制方法,并应用于调频系统的容错控制。首先,基于混合自动机理论,依据信息系统和物理系统的运行状态划分出CPPS调频系4的四种运行模态并明确之间的转移条件;其次,对于每一种模态,分别在SimEvents及Simulink中构建了基于事件驱动的信息采集、通信、处理、控制模块以及基于时间驱动的物理系统动态模型。对于包含信息系统故障的模态,提出一种频率估计策略及其对应的容错控制方法。最后,通过算例对本文提出的信息物理融合建模方法以及CPPS调频系统进行了测试,系统频率控制结果验证了所提方法的有效性。

Cyber Physical Modeling of Power Frequency Control System and Its Application in Fault-tolerant Control

In this paper, a method of modeling and controlling cyber physical power systems (CPPS) considering fusion of discrete event systems and continuous dynamic systems is proposed and applied to fault-tolerant control of frequency control systems. Firstly, based on hybrid automata theory, four operating modalities of CPPS frequency control systems are generated according to respective operating status of cyber system and physical system. The transition conditions between the modalities are clearly defined. Secondly, for each modality, modules of event-driven information acquisition, communication, processing and control, and a time-driven dynamic model of the physical system are constructed respectively in SimEvents and Simulink. For the modalities containing information system faults, a frequency estimation strategy and a corresponding fault-tolerant control method are proposed. Finally, the proposed cyber physical fusion modeling method and the CPPS frequency control system are tested with numerical examples. The results of system frequency control prove effectiveness of the proposed method and reveal the interaction mechanism of cyber system and physical system to some extent.