基于继电保护时空参数的电网故障诊断模型

A Power System Fault Diagnosing Model Based on Protective Relay Time-Space Relation

根据继电保护动作逻辑的时间和空间特性,定义了故障关联树,以描述保护装置的时空配合逻辑。利用空间关联度和保护动作时间对保护进行动作优先级排序,并将其映射到Petri网的动态推理模型中,以实现对电网元件的精确诊断。同时通过保护优先级参数对保护和断路器的动作行为作出评价。仿真算例证明该方法能在多种复杂故障的情况下进行快速诊断,对保护和断路器动作进行正确评估。

A fault diagnosing method based on the time-space relation of protective relays is proposed. A fault associated tree is defined to describe the logical cooperation between protection and breaker. The priority of protection is established according to the time-space relation and operation time of protective relays. Then the priority is mapped onto the dynamic reasoning model of Petri nets to realize precise diagnosis of fault elements in the grid. At the same time, evaluation of the protection＇s operation and breaker＇s action is made according to the priority factors of protection. Simulation results show that the fault diagnosing method can make rapid diagnosis in complex fault situations and give accurate evaluation results.