电网安全稳定控制系统当值策略可实施评估方法

针对电网安全稳定控制系统实际运行过程中当值控制策略是否可以足量执行的在线监视需求,文中首先分析了安全稳定控制装置的控制结构和执行逻辑,建立了面向对象和表达式组态的层次化控制策略模型。然后,提出了综合考虑稳定控制装置的通道通断状态、压板投退状态和电网运行工况的可控量识别方法和当值策略解析识别流程,并在此基础上进一步分析了双重化配置稳定控制装置在不同运行模式和出口连接方式下对动作对象选择的影响,提出了当值策略结果合并方法和可实施状态统计方法,实现了稳定控制系统当值策略的解析识别和在线监视预警,有利于及时发现稳定控制系统在实际运行中可能出现的隐患。最后,结合典型场景下切机和切负荷案例分析验证了所提方法的有效性。

Practicability Assessment Method of Duty Strategy for Security and Stability Control System in Power Grid

In order to meet the online monitoring demands whether the security and stability control system can perform sufficiently during the practical operation, the control structure and implementation logic of security and stability control devices are analyzed firstly. A model of hierarchical control strategy based on object-oriented and expression configuration is proposed. Then, a recognize method of controllable variables and a procedure of parsing duty strategy is proposed considering the on-off state of channels for security and stability control devices, retirement status of press plate and operation conditions of power grid. Furthermore, the influence of the dual-configuration stability control devices in different operation modes and outlet connection modes is analyzed. Duty strategy merging method and statistics method of executable state are put forward to realize the analytical identification, online monitoring and early warning of stability control duty strategy, which is beneficial to timely find the hidden operation danger of stability control system in actual operation. Finally, the case analysis of generator and load shedding in typical scenes verify the effectiveness of the proposed method.