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Application of Hybrid Meta-Heuristic Techniques for Optimal Load Shedding Planning and Operation in an Islanded Distribution Network Integrated with Distributed Generation

1
Power Electronics and Renewable Energy Research Laboratory (PEARL), Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
2
Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
3
Department of electrical engineering, Quaid-e-Awam University of Engineering Science and Technology, QUEST, Nawabshah, Sindh 67450, Pakistan
*
Author to whom correspondence should be addressed.
Energies 2018, 11(5), 1134; https://doi.org/10.3390/en11051134
Received: 25 March 2018 / Revised: 20 April 2018 / Accepted: 1 May 2018 / Published: 3 May 2018
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Abstract

In a radial distribution network integrated with distributed generation (DG), frequency and voltage instability could occur due to grid disconnection, which would result in an islanded network. This paper proposes an optimal load shedding scheme to balance the electricity demand and the generated power of DGs. The integration of the Firefly Algorithm and Particle Swarm Optimization (FAPSO) is proposed for the application of the planned load shedding and under frequency load shedding (UFLS) scheme. In planning mode, the hybrid optimization maximizes the amount of load remaining and improves the voltage profile of load buses within allowable limits. Moreover, the hybrid optimization can be used in UFLS scheme to identify the optimal combination of loads that need to be shed from a network in operation mode. In order to assess the capabilities of the hybrid optimization, the IEEE 33-bus radial distribution system and part of the Malaysian distribution network with different types of DGs were used. The response of the proposed optimization method in planning and operation were compared with other optimization techniques. The simulation results confirmed the effectiveness of the proposed hybrid optimization in planning mode and demonstrated that the proposed UFLS scheme is quick enough to restore the system frequency without overshooting in less execution time. View Full-Text
Keywords: load shedding technique; voltage stability index; islanding; distribution network; firefly algorithm; particle swarm optimization load shedding technique; voltage stability index; islanding; distribution network; firefly algorithm; particle swarm optimization
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Jallad, J.; Mekhilef, S.; Mokhlis, H.; Laghari, J.; Badran, O. Application of Hybrid Meta-Heuristic Techniques for Optimal Load Shedding Planning and Operation in an Islanded Distribution Network Integrated with Distributed Generation. Energies 2018, 11, 1134.

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