基于分层模型的配电网拓扑辨识

Topology Identification of Distribution Networks Based on Hierarchical Model

传统的电网模型主要描述网络元件和网络元件联结 ,其网络模型最终要解决的问题是在某一输入下的输出响应情况。而配电网的网络拓扑描述不仅要表示出各顶点之间的联结关系 ,而且要描述出当开关状态改变时 ,其运行网络结构的变化及对应参数的变化。同时配电网中存在T接点、分支 ,使配电网的负荷分配、网络重构、恢复供电等功能采用图算法难以实现全局最优。基于分层的拓扑模型不仅可以有效地辨识处理区域与分支 ,而且采用分层拓扑模型可以方便地对配电网各顶点进行状态估计 。

Traditional model of distribution networks mostly research the response of input excitation, by describing elements and connections of elements for distribution networks. When the states of vertexes in distribution networks have changed, the connections of elements transformation. Owning to the mutual couplings and branches of distribution networks, it is hard to achieve the global optimization for load balancing, reconfiguration and restoration after fault by nomograph. A new model based on hierarchical model is presented. This model can be employed to identify the zone and branches efficiently and offer a cogent topological analysis method for the global optimization. The test result shows the effectiveness of the proposed method.