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An Accelerated-Decomposition Approach for Security-Constrained Unit Commitment with Corrective Network Reconfiguration- Part II Results and Discussion

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Document pages: 8 pages

Abstract: This paper presents a novel approach to handle the computational complexityin security-constrained unit commitment (SCUC) with corrective networkreconfiguration (CNR) to harness the flexibility in transmission networks. Thisis achieved with consideration of scalability through decomposing theSCUC SCUC-CNR formulation and then fast screening non-critical sub-problems.This is compared against the extensive formulations of SCUC and SCUC-CNR toshow the advantages of the proposed typical-decomposition andaccelerated-decomposition approaches to SCUC and SCUC-CNR respectively.Simulation results on the IEEE 24-bus system show that the proposed methods aresubstantially faster without the loss in solution quality. The proposedaccelerated-decomposition approaches can be implemented for large power systemsas they have great performance in the scalability tests on the IEEE 73-bussystem and the Polish system when compared against the respective extensiveformulations and typical-decomposition approaches. Overall, a dynamicpost-contingency network can substantially alleviate network congestion andlead to a lower optimal cost.

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