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A spectral divide and conquer method based preconditioner design for power flow analysis 

Daǧ, Hasan; Yetkin, Emrullah Fatih (2010)
Power system simulations most of the time require solution of a large sparse linear system. Traditional methods such as LU decomposition based direct methods are not suitable for parallelization in general. Thus Krylov ...
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Gravitational search algorithm for post-outage bus voltage magnitude calculations 

Ceylan, Oǧuzhan; Ozdemir, Aydogan; Daǧ, Hasan (2010)
Branch outage problem is one of the key problems in power system security analysis. This paper solves branch outage problem using a bounded approach. Local constrained optimization problem in the bounded approach is solved ...
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Harmony search method based parallel contingency analysis 

Ceylan, Oǧuzhan; Daǧ, Hasan; Ozdemir, Aydogan (2010)
Power system security management is one of the key problems in power system analysis. Power system management center operators need to simulate contingencies as fast as possible and take the remedial actions in time. These ...
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Parallel Implementation Of Iterative Rational Krylov Methods For Model Order Reduction 

Yetkin, E. Fatih; Daǧ, Hasan (IEEE, 2010)
Model order reduction (MOR) techniques are getting more important in large scale computational tasks like large scale electronic circuit simulations. In this paper we present some experimental work on multiprocessor systems ...
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Protecting openflow switches against Denial of Service Attacks 

Bahaa-Eldin, Ayman M.; ElDessouky, Ebada Mohamed Essam Eldin Ibrahim; Daǧ, Hasan (IEEE, 2017)
This paper presents a novel approach to protect Openflow switches against a type of Denial of Service (DoS) attacks. Openflow switches are the core of Software Defined Networks (SDN) and they are very flexible programmable ...
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Feature Extraction Based on Deep Learning for Some Traditional Machine Learning Methods 

Çayır, Aykut; Yenidoğan, Işıl; Daǧ, Hasan (IEEE, 2018)
Deep learning is a subfield of machine learning and deep neural architectures can extract high level features automatically without handcraft feature engineering unlike traditional machine learning algorithms. In this paper ...
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Double branch outage modeling and simulation: Bounded network approach 

Ceylan, Oǧuzhan; Özdemir, Aydoğan; Daǧ, Hasan (Elsevier Science, 2015)
Energy management system operators perform regular outage simulations in order to ensure secure operation of power systems. AC power flow based outage simulations are not preferred because of insufficient computational ...
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On-Line Transient Stability Assessment Using Matlab Parallel Programming Environment 

Soykan, Gürkan; Daǧ, Hasan (IEEE, 2010)
Transient Stability Assessment (TSA) is the major part of Dynamic Security Assessment (DSA) in an electric power system. On-line TSA has gained more importance for power system security in last two decades. The decreasing ...
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Power flow using thread programming 

Daǧ, Hasan; Soykan, Gürkan (2011)
Power flow problem which is one of the most important applications in power system is solved using OpenMP Application Program Interface (API) a thread based programming technique for the shared memory programming environments. ...
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A preconditioner for transient stability time domain simulation 

Soykan, Gürkan; Flueck, Alexander J.; Daǧ, Hasan (2011)
Transient Stability analysis which is one of the most important tasks of power system dynamic security analysis determines the dynamic behaviour of the power system after a large disturbance. Differential and algebraic ...
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Daǧ, Hasan (34)
Dag H. (11)Ceylan O. (8)Ozdemir A. (7)Soykan, Gürkan (6)Ceylan, Oǧuzhan (5)Yetkin, E. Fatih (5)Çayır, Aykut (5)Özdemir, Aydoğan (4)Flueck, Alexander J. (3)... View MoreSubjectOptimization (7)Branch outage (6)Modeling (5)Contingency studies (3)Intelligent methods (3)Differential evolution (2)DoS (2)Gravitational search algorithm (2)Heuristic methods (2)Iterative methods (2)... View MoreDate Issued2020 - 2021 (3)2010 - 2019 (35)2008 - 2009 (7)Has File(s)true (32)false (13)

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