电力系统网络化控制中的关键问题

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。

Key Problems in Networked Control of Power System

To realize networked control in power system, it needs to research the performance of control system from the standpoint of control theory, it also needs to research the impact of network performance on control system from the viewpoint of computer network. In this paper, on the basis of networked control system, two kinds of real-time dispatching algorithms, i.e., the (rate monotonic (RM) and earlist deadline first (EDF), are proposed. The network scheduling, task scheduling, network performance and working modes of control nodes are researched; taking excitation system as research object, by use of TrueTime simulation toolbox, the step simulation of excitation system is conducted; the control performances of network scheduling and task scheduling are compared while the RM algorithm and EDF algorithm are adopted respectively; the strategies of power system networkded control to be adopted in network scheduling, task scheduling, selection of network type and selection of switcher buffer are suggested.