一种配电网故障恢复快速拓扑和潮流计算方法

针对配电网故障恢复的特点,提出了一种快速拓扑分析和潮流计算方法。首先利用SQL关系数据库存储配网的连接关系和节点、支路信息,方便数据维护,提高拓扑重构的灵活性,在故障分析时,将数据库中的配网信息加载到内存中形成面向对象的实时数据库。然后运用广度优先搜索法进行拓扑分析,并结合前推回代法进行潮流计算。最后采用基于QT的C++实现用GUI界面显示拓扑和潮流计算结果。结果表明:该算法能快速正确检测配网的连通性、判断是否存在环路或孤岛;同时具有良好的数据维护性,计算速度快。

A fast topology analysis and power flow calculation algorithm for distribution network service restoration

Aiming to the distribution network service restoration, this paper proposes a fast topology analysis and power flow calculation method. Firstly, the distribution network structure is stored by SQL relational database. The data maintenance can be convenient and the topology reconstruction can be highly flexible. Both of the node list and branch list store the data loaded from a relational database, which forms the object-oriented real-time database. Then the topology based on the breadth first search method is analyzed, and the power flow combined with the forward and backward substitution method is calculated. Finally, based on C++ programme on QT, the results of topology analysis and power flow on GUI are provided. Results show that the algorithm can quickly detect the distribution network connectivity, judge whether there are loops or isolations, and calculate fast on the premise of the convenient data maintenance.