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Energies 2018, 11(2), 347; https://doi.org/10.3390/en11020347

On the Application of Joint-Domain Dictionary Mapping for Multiple Power Disturbance Assessment

1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronics Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2
School of Computer Science, South-Central University for Nationalities, Wuhan 430074, China
3
School of Automation, Ministry of Education Key Laboratory of Image Processing and Intelligence Control, Huazhong University of Science and Technology, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Received: 25 December 2017 / Revised: 19 January 2018 / Accepted: 26 January 2018 / Published: 2 February 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

This paper proposes a joint-domain dictionary mapping method to obtain high assessment accuracy of multiple power disturbances. Firstly, in order to achieve resolutions in both the time and frequency domains, a joint-domain dictionary is proposed which consists of a discrete Hartley base and an identity matrix. Due to the low correlation between the discrete Hartley base and the identity matrix, the joint-domain dictionary mapping can separately capture the approximations of the sinusoidal components and transients. Since the mapping coefficients contain the physical quantities, the eigenvalues of each component can be effectively estimated. A quantified eigenvalue classifier was designed for identifying power disturbances using the estimated eigenvalues. The proposed method was compared with several advanced methods through simulated power disturbances under different noise conditions, and actual data from the Institute of Electrical and Electronics Engineers Power and Energy Society database. The results reveal that the joint-domain dictionary mapping technique shows good performance on parameter estimation and recognition precision, even dealing with complicated multiple power disturbances. View Full-Text
Keywords: power disturbance; joint-domain dictionary; pattern recognition; parameter estimation power disturbance; joint-domain dictionary; pattern recognition; parameter estimation
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Cai, D.; Li, K.; He, S.; Li, Y.; Luo, Y. On the Application of Joint-Domain Dictionary Mapping for Multiple Power Disturbance Assessment. Energies 2018, 11, 347.

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