Yazar "Ece, Doğan Gökhan" için WoS İndeksli Yayınlar Koleksiyonu listeleme
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An analysis of transformer excitation current under nonsinusoidal supply voltage
Ece, Doğan Gökhan; Akçay, Hüseyin (IEEE-Inst Electrical Electronics Engineers Inc, 2002)In this paper, the effect of nonsinusoidal supply voltage on the core loss and the transformer excitation current is investigated. The time-domain waveform of the transformer excitation current is calculated for a worst-case ... -
Compression of power quality event data using 2D representation
Gerek, Ömer Nezih; Ece, Doğan Gökhan (Elsevier Science Sa, 2008)This paper introduces the energy compaction efficiency of a novel two-dimensional (2D) representation for compression of recorded power quality event data. The 2D representation enables to exploit redundancy across vertical ... -
Condition monitoring of speed controlled induction motors using wavelet packets and discriminant analysis
Ece, Doğan Gökhan; Başaran, Murat (Pergamon-Elsevier Science LTD, 2011)This work presents an intelligent method for the condition monitoring of induction motors supplied with adjustable speed drives (ASD). Most of the previous work in this area concentrated on the fault detection and ... -
Covariance analysis of voltage waveform signature for power-quality event classification
Gerek, Ömer Nezih; Ece, Doğan Gökhan; Barkana, Atalay (IEEE-Inst Electrical Electronics Engineers Inc, 2006)In this paper, covariance behavior of several features (signature identifiers) that are determined from the voltage waveform within a time window for power-quality (PQ) event detection and classification is analyzed. A ... -
Detection of Mechanical Faults in Induction Motors Supplied with Adjustable Speed Drives
Başaran, Murat; Ece, Doğan Gökhan (IEEE, 2009)In this work, the mechanical faults that occur in induction motors, which are widely used in industry due to their simple and rugged construction and cost effective pricing, are analyzed. The certain fault modes are generated ... -
Detection of Voltage Flicker and Voltage Harmonic Using Hilbert Huang Transform
Önal, Yasemin; Gerek, Ömer Nezih; Ece, Doğan Gökhan (IEEE, 2014)Hilbert Huang Transform, which was suggested by Huang and improved by Flandrin and his group, is a new signal processing method. The analysis of nonlinear and non stationary signals can use HHT. This paper deals with the ... -
Electric power quality education and testing laboratory with local utility contribution
Ece, Doğan Gökhan; Agalar, Şener (Manchester University Press, 2009)An education and testing laboratory with local utility contribution for electric power quality (PG) studies is presented in this paper. The laboratory functions as an instructional and as a research environment for graduate ... -
Empirical mode decomposition application for short-term flicker severity
Önal, Yasemin; Gerek, Ömer Nezih; Ece, Doğan Gökhan (Tubitak Scientific & Technical Research Council Turkey, 2016)In this article, an approach based on empirical mode decomposition (EMD) is suggested in order to calculate short-term flicker severity, Pst, in power systems. EMD is a new signal processing method used for the analysis ... -
Hilbert-Huang Transform Based Approach for Measurement of Voltage Flicker Magnitude and Frequency
Önal, Yasemin; Ece, Doğan Gökhan; Gerek, Ömer Nezih (Taylor & Francis Inc, 2015)Voltage flicker is a non-stationary waveform for which direct spectral analysis is not appropriate. To overcome this difficulty, a Hilbert-Huang transform based technique is proposed here. Hilbert-Huang transform is a new ... -
Induction machine condition monitoring using notch-filtered motor current
Günal, Serkan; Ece, Doğan Gökhan; Gerek, Ömer Nezih (Academic Press LTD- Elsevier Science LTD, 2009)This paper presents a new approach to induction motor condition monitoring using notch-filtered motor current signature analysis (NFMCSA). Unlike most of the previous work utilizing motor current signature analysis (MCSA) ... -
Induction Motor Fault Diagnosis via Current Analysis on Time Domain
Günal, Serkan; Ece, Doğan Gökhan; Gerek, Ömer Nezih (IEEE, 2009)This study proposes a novel approach to induction motor fault diagnosis through motor current analysis. Most of the previous works employing motor current analysis use spectral methods to extract required features for ... -
A novel feature vector consisting of Ar-Ma model parameters for motor fault classification
Ece, Doğan Gökhan; Gerek, Ömer Nezih (IEEE, 2006)In this work, AR-MA parameters corresponding to zeros and poles of the z-plane model are extracted from the sampled current waveform spectra, and considered as elements of a feature vector to classify faulty motors. The ... -
A power quality analysis scheme using adaptive subband decomposition
Ece, Doğan Gökhan; Gerek, Ömer Nezih (Wiley, 2009)In this work, a new event detection method for power quality analysis based on the statistical analysis of adaptive decomposition signals is presented. The combination of an adaptive prediction filter-based subband ... -
Power quality event detection using joint 2-D-wavelet subspaces
Ece, Doğan Gökhan; Gerek, Ömer Nezih (IEEE-Inst Electrical Electronics Engineers Inc, 2004)In this work, we present a novel two-dimensional (2-D) representation of power system waveforms for the automatic analysis and detection of transient events. The representation is composed of a matrix whose rows are formed ... -
The search for optimal feature set in power quality event classification
Günal, Serkan; Gerek, Ömer Nezih; Ece, Doğan Gökhan; Edizkan, Rıfat (Pergamon-Elsevier Science LTD, 2009)The significance of detection and classification of power quality (PQ) events that disturbs the voltage and/or current waveforms in the electrical power distribution networks is well known. Consequently, in spite of a large ...