基于复杂网络理论的电网分区及断面搜索方法

首先,为了解决传统边介数理论中电网潮流传输仅走最短路径的缺点,提出了加权极大边介数的概念,该指标在一定程度上结合了电网拓扑和当前运行方式对分区的影响,使得分区方法更适用于实际电网;进一步,提出了分区终止判据,有效地利用了关键支路,在减少了计算量的同时防止了孤立节点单独成区的现象发生;最后,在电网分区的基础上搜索割集得出断面。在某实际电网中的应用验证了该算法在关键断面搜索中的可行性。与现有的断面搜索方法相比,该算法能搜索出更薄弱的断面,并且不依赖于过载支路的选取,也不要求计算网络的所有割集,更适用于实际电网。

Subarea Division and Transmission Sections Search Method Based on Complex Network Theory

In order to solve the defect of tradition edge betweenness which takes the shortest path as the only path of power flow,this paper proposes the weighted maximum edge betweenness.This index considers both the influences of network topology and current operation mode on subarea division,which makes the subarea division is more suitable for real power network.Then,this paper proposes the ending criterion of subarea division to effectively utilize the key branches,which reduces the computation amount and prevents the isolated nodes from being a single zone.Finally,this paper obtains the transmission sections by searching the cut sets of network based on the subarea division.A case study of practical system verifies the feasibility of this method in key section search.Compared with the existing section search methods,the proposed method can get more fragile sections and neither depends on the selection of overload branches,nor requires the calculation of all cut sets,which can be better applied to the actual power grid.