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Energies 2018, 11(1), 143; doi:10.3390/en11010143

PMU Measurement-Based Intelligent Strategy for Power System Controlled Islanding

1
School of Electrical Engineering, Southeast University, Nanjing 210096, China
2
College of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
*
Author to whom correspondence should be addressed.
Received: 28 November 2017 / Revised: 2 January 2018 / Accepted: 3 January 2018 / Published: 7 January 2018
(This article belongs to the Section Electrical Power and Energy System)
View Full-Text   |   Download PDF [2113 KB, uploaded 7 January 2018]   |  

Abstract

Controlled islanding is an effective remedy to prevent large-area blackouts in a power system under a critically unstable condition. When and where to separate the power system are the essential issues facing controlled islanding. In this paper, both tasks are studied to ensure higher time efficiency and a better post-splitting restoration effect. A transient stability assessment model based on extreme learning machine (ELM) and trajectory fitting (TF) is constructed to determine the start-up criterion for controlled islanding. This model works through prompt stability status judgment with ELM and selective result amendment with TF to ensure that the assessment is both efficient and accurate. Moreover, a splitting surface searching algorithm, subject to minimal power disruption, is proposed for determination of the controlled islanding implementing locations. A highlight of this algorithm is a proposed modified electrical distance concept defined by active power magnitude and reactance on transmission lines that realize a computational burden reduction without feasible solution loss. Finally, the simulation results and comparison analysis based on the New England 39-bus test system validates the implementation effects of the proposed controlled islanding strategy. View Full-Text
Keywords: controlled islanding; transient stability; machine learning; splitting surface searching algorithm controlled islanding; transient stability; machine learning; splitting surface searching algorithm
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Tang, Y.; Li, F.; Zheng, C.; Wang, Q.; Wu, Y. PMU Measurement-Based Intelligent Strategy for Power System Controlled Islanding. Energies 2018, 11, 143.

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