摘要
目前对站域后备保护算法研究已有一定的进展,但对相应跳闸策略研究还比较缺乏。针对这一空白,本文提出了一种基于图论知识的站域后备保护跳闸策略。根据智能变电站拓扑结构、站间连接关系及断路器状态信息,形成实时站内元件-开关关联矩阵和站间元件-开关关联矩阵,然后结合故障元件和失灵断路器的具体情况建立站域元件-开关关联向量,并通过关联向量识别出站域后备保护在实现近后备保护功能和断路器失灵保护功能时所关联的断路器。算例分析表明,所提方法可适用于主接线形式复杂和运行方式变化的智能变电站,能实现自适应最小范围快速切除故障。
At present, there is a certain progress in the research of substation-area back up protection algorithm, but it lacks research on corresponding tripping strategy. This paper proposes a tripping strategy for substation-area back up protection based on graph theory. According to the topology structure of smart substation, the inter-substation connection relation and the breaker status information, the real-time substation component-switch correlation matrix and the inter-substation component-switch correlation matrix are formed, and then the substation component-switch relevance vector is established combined with the specific situation of the faulty component and the failure breaker. The breakers that need to be tripped in local backup protection, breaker failure protection can be accurately recognized by the relevance vector. The example analysis shows that the proposed method can be applied to the smart substation with complex main connections and changing operation modes, and can cut off the fault quickly with the minimum blackout zone.
作者
蒋红亮
吕飞鹏
Jiang Hongliang;Lv Feipeng(School of Electrical Engineering and Information, Sichuan University, Chengdu 610065)
出处
《电气技术》
2017年第12期24-29,37,共7页
Electrical Engineering
关键词
智能变电站
继电保护
站域后备保护
图论
跳闸策略
smart substation
relay protection
substation-area backup protection
graph theory
tripping strategy
