Tree-partitioning as an emergency measure to contain cascading line failures

Bialek, J.W. and Vahidinasab, V. ORCID: 0000-0002-0779-8727, 2021. Tree-partitioning as an emergency measure to contain cascading line failures. IEEE Transactions on Power Systems. ISSN 0885-8950

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This paper proposes to replace controlled islanding, which is a defense mechanism against cascading failures, by tree partitioning whereby some of the tie-lines connecting the clusters are still connected in such a way that the cluster-level graph forms a tree. Tree-partitioning prevents line failures from spreading between clusters, similarly as for islanding, but keeps the clusters connected. That results in three main advantages. Power transfers between the clusters can still take place, helping to balance each cluster and limiting any necessary load shedding. Fewer lines are cut, which reduces the shock to the system. There is no need to re-synchronize the clusters after the emergency. This paper offers a simple graph-theoretic justification for tree-partitioning, rather than one based on the spectral analysis of network Laplacian proposed in the literature. It also proposes a two-stage methodology, which utilizes spectral clustering, for splitting a network into tree-connected clusters. Test results performed on the 118 node IEEE test network have confirmed the usefulness of the methodology.

Item Type: Journal article
Publication Title: IEEE Transactions on Power Systems
Creators: Bialek, J.W. and Vahidinasab, V.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
ISSN: 0885-8950
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 15 Jun 2021 09:27
Last Modified: 15 Jun 2021 09:27

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