Article
Engineering, Electrical & Electronic
Yiqing Yu, Wei Zhao, Shisong Li, Songling Huang
Summary: This article proposes a novel method for monitoring instantaneous PQ indices in single- and three-phase systems, effectively separating interharmonics and transient disturbances to track transitory changes in power systems with high accuracy.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Computer Science, Artificial Intelligence
Ibrahim Mustafa Mehedi, Masoud Ahmadipour, Zainal Salam, Hussein Mohammed Ridha, Hussein Bassi, Muhyaddin Jamal Hosin Rawa, Mohammad Ajour, Abdullah Abusorrah, Md. Pauzi Abdullah
Summary: This paper introduces a method to enhance the performance of the multiclass support vector machine classifier using modified cuckoo search. Wavelet packet transform is used to extract crucial features for the classifier. Through simulations, the proposed method achieves high classification accuracies under different signal-to-noise ratios and outperforms other heuristic classification methods.
APPLIED SOFT COMPUTING
(2021)
Article
Chemistry, Analytical
Mahsa Mozaffari, Keval Doshi, Yasin Yilmaz
Summary: This paper proposes a sequential and multivariate approach for real-time detection and classification of power quality disturbances, enabling joint processing of data from multiple meters for quicker detection. The proposed classification method is demonstrated to quickly and accurately detect and classify power disturbances.
Article
Automation & Control Systems
Nand Kishor, Rupal H. Singh, Soumya R. Mohanty, Omkar Yadav
Summary: This study introduces the use of energy preserving ensemble empirical mode decomposition technique to detect evolving disturbances that occur in succession and classify them using least square support vector machine. The real-time implementation of techniques in field programmable gate array blocks for detection and classification of evolving disturbances is demonstrated. Comparison with existing techniques is also included in the discussion section.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Rodrigo de A. Coelho, Karcius M. C. Dantas, Erica M. Lima, Nubia S. D. Brito, Kezia de V. O. Dantas, Raquel Zacarias
Summary: This paper proposes a method to detect disturbances using a power component as a detection index, estimated using real-time stationary discrete wavelet packet transform. The method analyzes the voltage and current of each phase separately, acquired at a single upstream measurement point. The proposed method is evaluated using simulated events in a test system based on a real distribution network, and it proves suitable for detecting non-stationary disturbances.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Computer Science, Information Systems
Tianyu Zhang, Tao Gong, Song Han, Qingxu Deng, Xiaobo Sharon Hu
Summary: In this study, a fully distributed packet scheduling framework called FD-PaS is proposed to provide fast response to unexpected disturbances while minimizing performance degradation for meeting timing and reliability requirements of critical tasks. The framework incorporates key advances in algorithm design and data link layer protocol design to enable individual nodes to make decisions locally without centralized control, demonstrating effectiveness in providing fast response for handling disturbances and ensuring designated QoS requirements through extensive simulation and testbed results.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2021)
Article
Chemistry, Physical
Haijun Wang, Diqiu He, Mingjian Liao, Peng Liu, Ruilin Lai
Summary: This paper proposed a new method for online evaluation of weld quality using real-time temperature signals and energy characteristic parameters. A prediction model based on least squares support vector machine and genetic algorithm was established, showing a good prediction ability based on experimental results.
Article
Construction & Building Technology
Hao Zhang, Junjie Li, Fei Kang
Summary: This study uses an active monitoring method to observe the humidity of concrete in real time by embedding piezoelectric smart aggregates in the concrete. A humidity index is defined to describe the variation in humidity of the concrete. The experimental results demonstrate that the humidity index is effective in monitoring and evaluating the humidity inside concrete structures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Physics, Multidisciplinary
Ping Xie, Qingya Chang, Yuanyuan Zhang, Xiaojiao Dong, Jinxu Yu, Xiaoling Chen
Summary: This study proposes a novel method, TF-NMF, to explore the time-varying regularity of muscle synergy characteristics in different frequency bands. The experimental results show that the number and frequency characteristics of synergy modules change during the conversion between wrist flexion and extension movements.
Review
Energy & Fuels
Joaquin E. Caicedo, Daniel Agudelo-Martinez, Edwin Rivas-Trujillo, Jan Meyer
Summary: This paper provides a comprehensive literature review on the real-time detection and classification of Power Quality Disturbances (PQDs), with a specific focus on voltage sags and notches. A systematic method based on scientometrics, text similarity, and the analytic hierarchy process is proposed to structure the review and select relevant literature. Bibliometric analysis is performed to reveal patterns such as publication trends, top publishing countries, and distribution of topics. A critical review is conducted on selected articles, covering various aspects of PQD detection and classification.
PROTECTION AND CONTROL OF MODERN POWER SYSTEMS
(2023)
Article
Engineering, Aerospace
Yu-Jie Wang, Yong -Ping Zhao, Huan Wu, Yi Jin
Summary: This paper experimentally records the pressure signals from a two-dimensional supersonic inlet and analyzes the signals and flow field images to identify the existence of precursor phenomena. A real-time online unstart prediction approach, named CD-WPT-CNN, is proposed by combining change-point detection, wavelet packet, and convolutional neural network. The effectiveness of the approach is verified under test conditions. The experimental results show that the CD-WPT-CNN method outperforms traditional prediction methods and has great application potential.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
R. Tehranchi, K. Moghtased-Azar, A. Safari
Summary: Understanding the noise of GPS coordinate time series is crucial for evaluating unknown parameters realistically. The research introduces a fast and accurate method, FREML, to estimate noise content efficiently. Comparisons with existing software showed that FREML reduced computation time significantly while providing equivalent results for noise components and unknown parameters.
JOURNAL OF GEODESY
(2021)
Article
Construction & Building Technology
Kaiyang Zhou, Dong Lei, Jintao He, Pei Zhang, Pengxiang Bai, Feipeng Zhu
Summary: This study combines DIC and Daubechies wavelet method to achieve real-time location of micro-damage on concrete structures, providing an effective and feasible method for structural health monitoring.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Transportation Science & Technology
Omid Mousavizadeh, Mehdi Keyvan-Ekbatani, Tom M. Logan
Summary: Real-time information regarding turning rates at intersections is crucial for efficient traffic control and management systems, but obtaining measurements of turning movements faces limitations. Existing optimization-based methods are constrained by computational complexity and lack of sufficient stationary traffic measurements in urban networks. A hybrid method using probe vehicles, wavelet transformation, and physical data-driven modeling offers a promising way to estimate turning rates with reduced reliance on stationary measurements.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2021)
Article
Engineering, Multidisciplinary
Kenan Gencol
Summary: This paper proposes a new iterative optimization-based algorithm for the measurement of harmonics in the electrical power industry, which shows robust and accurate estimation of deviated system frequency and amplitudes of harmonic components.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2023)
Article
Automation & Control Systems
Denis Keuton Alves, Ricardo Lucio de Araujo Ribeiro, Flavio Bezerra Costa, Thiago de Oliveira Alves Rocha, Josep M. Guerrero
Summary: This article proposes a wavelet-based monitor for grid impedance estimation, combining transient detection and impedance estimation methods, which accurately identifies the resistive and reactive components of the grid impedance.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Rafael Lucas da Silva Franca, Francisco Caninde da Silva Junior, Tiago R. Honorato, Joao Paulo G. Ribeiro, Flavio Bezerra Costa, Felipe Lopes, Kai Strunz
Summary: This paper proposes a one-terminal traveling wave-based transmission line earth fault distance protection function, which only requires the detection of the first incident modal earth fault-induced traveling waves, eliminating the need to detect wavefronts reflected from the fault point. The proposed function is more accurate and significantly reduces transmission line distance protection tripping times without dependability losses.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Engineering, Electrical & Electronic
Huilman S. Sanca, Flavio B. Costa, Francisco C. Souza Jr, Benemar A. de Souza
Summary: In this paper, a robust three-phase distribution system frequency estimation algorithm based on the widely linear complex least mean square has been proposed, showing good accuracy and convergence speed during distributed generation. The performance of the algorithm was compared to other methods, demonstrating its effectiveness.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
F. P. Souza, L. F. Q. Silveira, F. B. Costa, M. M. Leal
Summary: Conventional overcurrent-based protection systems are generally insensitive to high impedance faults, which can have serious consequences. Therefore, this study proposes a method based on statistical characteristics to identify high impedance faults regardless of noise interference and overcurrent levels.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Sergey Yanchenko, Flavio B. Costa, Kai Strunz
Summary: The simulation tool developed for modeling harmonic propagation in low voltage distribution networks uses a hybrid domain approach to accurately represent nonlinear household devices and the supply network. Compared to traditional methods, the tool offers higher accuracy, shorter simulation times, and improved convergence under weak grid conditions. Two application examples demonstrate its effectiveness compared to brute force time domain modeling.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Engineering, Electrical & Electronic
Samara de Cavalcante Paiva, Ricardo Lucio de Araujo Ribeiro, Denis Keuton Alves, Josep M. Guerrero, Thiago de Oliveira Alves Rocha, Flavio Bezerra Costa
Summary: This article introduces a wavelet-based frequency tracking monitor for low-voltage ac microgrids, utilizing a modified continuous wavelet transform algorithm for real-time applications. The method provides frequency estimation through voltage measurements and outperforms conventional estimators in terms of convergence time in experiments.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Rodrigo Prado Medeiros, Flavio Bezerra Costa, Kleber Melo Silva, Jose de Jesus Chavez Muro, Jose Raimundo Lima Junior, Marjan Popov
Summary: In this paper, a novel time-domain power transformer differential protection method based on Clarke and wavelet transforms is proposed. The performance validation and implementation in a real-time digital simulator demonstrate the efficiency and feasibility of the method.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Engineering, Electrical & Electronic
Karcius M. C. Dantas, Felipe V. Lopes, Kleber M. Silva, Flavio B. Costa, Nilo S. S. Ribeiro
Summary: An approach is proposed in this paper to detect the secondary arc extinction in single-phase auto-reclosing of non-compensated transmission lines. The approach involves analyzing the line side voltage phasors in the modal domain to identify the presence and extinction of the secondary arc. It can also determine if the arc re-ignites during the line dead time. The proposed approach can be easily implemented in existing Intelligent Electronic Devices (IEDs) without additional hardware or equipment requirement.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Automation & Control Systems
Gabriel A. Fonseca, Danton D. Ferreira, Flavio B. Costa, Aryfrance R. Almeida
Summary: Researchers proposed using the random forest method for fault classification in transmission lines, with a simple preprocessing step to improve efficiency. Comparative experiments showed that the random forest had slightly higher accuracy for testing data compared to the neural network, but the neural network exhibited better generalization capacity.
JOURNAL OF CONTROL AUTOMATION AND ELECTRICAL SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Denis Keuton Alves, Ricardo Lucio Araujo Ribeiro, Luiz Felipe de Queiroz Silveira, Thiago de Oliveira Alves Rocha
Summary: This paper proposes a real-time wavelet-based power estimator using a real-time modified stationary discrete wavelet packet transform (RT-MSDWPT). The proposed method overcomes the conventional SDWPT main constraints of power estimations related to the lack of reactive power flow direction and susceptibility to off -nominal frequency operation.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Flavio B. B. Costa, Stefan Haselbarth, Sergey Yanchenko, Aurenice M. M. Oliveira, Kai Strunz
Summary: The increasing presence of power electronic converters, nonlinear loads, and distributed generation has resulted in higher levels of harmonic and interharmonics in power networks. This has made power quality a crucial performance indicator for both power utilities and end-users. This study introduces a novel harmonic estimation method that utilizes real-time stationary discrete wavelet packet transform (RT-SDWPT). The proposed technique decomposes the input signal into frequency bands with harmonic information and uses compensation to estimate root mean square (RMS) values of harmonics at each sampling period. Experimental results demonstrate that the proposed method outperforms traditional methods in terms of accuracy and speed.
IEEE TRANSACTIONS ON POWER DELIVERY
(2023)
Article
Engineering, Electrical & Electronic
Ricardo Lucio Araujo Ribeiro, Ariya Sangwongwanich, Denis Keuton Alves, Frede Blaabjerg, Thiago de Oliveira Alves Rocha
Summary: This paper proposes a novel method of capacitor condition monitoring for the dc-link of power converters used in distributed energy resources systems. The method injects an intermittent noncharacteristic signal into the dc-link to estimate the equivalent series resistance (ESR) and capacitance (C) of the capacitors. A real-time stationary discrete wavelet packet transform (RT-SDWPT) is used for capacitor parameter estimations. Experimental results from a microgrid laboratory setup demonstrate the effectiveness and feasibility of the proposed method.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Computer Science, Information Systems
Ricardo Lucio de Araujo Ribeiro, Arman Oshnoei, Amjad Anvari-Moghaddam, Frede Blaabjerg
Summary: This paper proposes an adaptive grid impedance shaping approach, implemented through a variable structure virtual impedance control strategy, to improve the power flow control of grid-forming power converters. The method considers the X/R ratio and power rating, and uses virtual negative resistance and positive virtual reactance to implement the virtual impedance. The virtual reactance is divided into two parts, providing a fine-tuning action to match the control objectives and compensate grid impedance uncertainties. Experimental tests demonstrate the effectiveness and robustness of the proposed method.
