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Correction published on 1 May 2018, see Energies 2018, 11(5), 1104.

Open AccessArticle
Energies 2018, 11(2), 434; https://doi.org/10.3390/en11020434

A Power System Network Splitting Strategy Based on Contingency Analysis

1
Faculty of Electrical Engineering, Universiti Teknikal Malaysia Melaka, 76100 Durian Tunggal, Melaka, Malaysia
2
Institute of Power Engineering, Universiti Tenaga Nasional, Jalan Ikram- Uniten, 43000 Kajang, Selangor, Malaysia
3
Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
4
Electrical Technology Section, Universiti Kuala Lumpur, British Malaysian Institute, 53100 Gombak, Kuala Lumpur, Malaysia
*
Author to whom correspondence should be addressed.
Received: 13 November 2017 / Revised: 23 January 2018 / Accepted: 31 January 2018 / Published: 14 February 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

This paper proposes a network splitting strategy following critical line outages based on N-1 contingency analysis. Network splitting is the best option for certain critical outages when the tendency of severe cascading failures is very high. Network splitting is executed by splitting the power system network into feasible set of islands. Thus, it is essential to identify the optimal splitting solution (in terms of minimal power flow disruption) that satisfies certain constraints. This paper determines the optimal splitting solution for each of the critical line outage using discrete evolutionary programming (DEP) optimization technique assisted by heuristic initialization approach. Heuristic initialization provides the best initial cutsets which will guide the optimization technique to find the optimal splitting solution. Generation–load balance and transmission line overloading analysis are carried out in each island to ensure the steady state stability is achieved. Load shedding scheme is initiated if the power balance criterion is violated in any island to sustain the generation–load balance. The proposed technique is validated on the IEEE 118 bus system. Results show that the proposed approach produces an optimal splitting solution with lower power flow disruption during network splitting execution. View Full-Text
Keywords: cascading failures; N-1 contingency; network splitting strategy; DEP optimization technique cascading failures; N-1 contingency; network splitting strategy; DEP optimization technique
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Saharuddin, N.Z.; Zainal Abidin, I.; Mokhlis, H.; Abdullah, A.R.; Naidu, K. A Power System Network Splitting Strategy Based on Contingency Analysis. Energies 2018, 11, 434.

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