Spectral MST-Based Graph Outlier Detection With Application to Clustering of Power Networks
Ilya Tyuryukanov (TU Delft - Intelligent Electrical Power Grids)
Marjan Popov (TU Delft - Intelligent Electrical Power Grids)
M. van der Meijden (TenneT TSO B.V.)
Vladimir Terzija (The University of Manchester)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
An increasing number of methods for control and analysis of power systems relies on representing power networks as weighted undirected graphs. Unfortunately, the presence of outliers in power system graphs may have a negative impact on many of these methods. In addition, detecting outliers can be a relevant task on its own. Motivated by the low number of outlier detection algorithms focusing on weighted undirected graphs, this paper proposes an efficient and effective method to detect loosely connected graph clusters below a certain number of nodes. The essence of the method lies in the efficient examination of the spectral minimal spanning tree of the input graph. The obtained results on several large test power networks validate the high outlier detection performance of the proposed method and its high computational efficiency.