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电力系统网络化控制,不仅需要从控制理论的角度出发研究系统的控制性能,而且应该从计算机网络的角度出发研究网络性能对控制系统的影响。从网络化控制系统出发,提出了网络化控制系统中的单调速率(rate monotonic,RM)和最小截止期优先(earlist deadline first,EDF)2类实时调度算法。研究了网络化控制中的网络调度、任务调度、网络性能、控制节点工作方式,并以励磁系统为控制对象,采用True Time仿真工具,进行了励磁系统的阶跃仿真。比较了在RM和EDF算法下网络调度和任务调度的控制性能,研究了电力系统网络化控制在网络调度、任务调度、网络类型选择、交换机缓冲区选择中应当采取的策略。
The networked control of power system not only needs to study the control performance of the system from the perspective of control theory, but also studies the influence of network performance on the control system from the perspective of computer network. Based on the networked control system, two kinds of real-time scheduling algorithms, rate monotonic (RM) and earliest deadline first (EDF), are proposed in the networked control system. The network scheduling, task scheduling, network performance and working mode of control nodes in networked control are studied. The exciting system is taken as the control object. The True Time simulation tool is used to simulate the excitation system. The control performance of network scheduling and task scheduling under RM and EDF is compared. The strategies that networked control of power system should take in network scheduling, task scheduling, network type selection and switch buffer selection are studied.