【摘要】 连锁故障是具有时序特征的系统故障,在连锁故障的相继故障阶段,保护装置相继动作跳闸。由于保护从启动到跳闸需经历一段时间,可用具有始点和终点的时间区间表示,因此保护相继动作的时序关系可以表示为不同时间区间之间的时序关系。该文基于时态知识表示理论,通过Allen区间代数方法,研究了相继故障的时序问题。在考虑保护动作模型时间属性的基础上,提出了基于时序推理的故障路径搜索策略,构造了具有时序特征的相继故障演变模型。算例分析显示,相继故障演变模型具有双时态的特点。更多还原

【Abstract】 Cascading failures are system failures with temporal characteristic.In the continual fault stage of cascading failures,protective devices one after another trip.Because protection goes through a period of time from start-up to trip,it can be depicted by time interval with the beginning and end points.Therefore temporal relation of protection succession action can be expressed by temporal relation of different time interval.The article based on temporal knowledge representation theory,used Allen’s interval algebra method,studied temporal problem in the continual fault stage.Taking account of time attribute of protection movement model,the paper proposed fault path search strategy based on temporal reasoning,thus structured a kind of continual fault evolution model with temporal characteristic.Example analysis demonstrated that the evolution model possess bitemporal characteristic.更多还原