广域继电保护需融合电网多点信息实现故障元件识别,因此,保护算法的高容错性是保证其正确动作的关健.文中提出一种基于多信息融合的广域继电保护新算法,该算法根据电网结构形成故障识别编码,并利用基于常规主/后备保护原理的保护动作信息和断路器位置信息,构建适应度函数和状态期望函数.最后,利用故障前后的适应度分析故障概率,以实现高容错性的故障元件识别算法.基于IEEE 10机39节点系统的仿真表明:所提出的广域继电保护算法动作正确,且能较好地克服信息缺失或信息错误带来的影响,具有很好的实用性.%As wide area backup protection needs multipoint information to identify the fault element, high fault tolerance of the protection algorithm is the key to its correct operation. A novel wide area backup protection algorithm is presented based on wide area information fusion. Fault identification coding is formed according to the structure of the power grid, and the fitness and state expected function is constituted by the operation information of conventional main/backup protection and breaker status. Finally, the fault probability is calculated using the pre- and post-fault fitness function to realize the fault element identification algorithm. Simulation test based on IEEE 39-bus system demonstrates the effectiveness and excellent fault tolerance of this method.
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