Article
Energy & Fuels
Hun-Chul Seo
Summary: This paper proposes a new protection scheme for low voltage direct current (LVDC) microgrid, which estimates the fault section using wavelet transform (WT) and sends trip signals accordingly. Simulations using EMTP/ATPDraw and MATLAB verify the accuracy and effectiveness of the proposed scheme.
Article
Automation & Control Systems
Jae-Beom Ahn, Hyun-Bin Jo, Hong-Je Ryoo
Summary: This article introduces a method for detecting series arc faults in photovoltaic systems based on noise pattern analysis. The proposed method distinguishes between system noise and arc noise and prevents false detection. The method uses periodic feature analysis and zero-range density analysis to achieve false detection prevention and detect arc noise. The reliability of the method is verified through noise distinction experiments.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Chemical
Songho Lee, Taehyun Lee, Jeongyeong Kim, Jongjik Lee, Kyungha Ryu, Yongjin Kim, Jong-Won Park
Summary: With the development of IoT, big data, and AI, it is now possible to acquire and analyze various condition signals from industrial machinery facilities. This technology has been applied to the development of fully autonomous ships, where fault diagnosis is crucial. In this study, a fault diagnosis framework for ship oil purifiers was proposed and achieved high diagnostic performance.
Article
Engineering, Electrical & Electronic
Kyung-Min Lee, Chul-Won Park
Summary: This paper proposes a new fault detection method for LVDC microgrids with RES, which demonstrates reliable operation through simulation and performance verification. The method utilizes instantaneous current change rate, detail coefficient of the discrete wavelet transform, and absolute detail energy for fault detection, and models and analyzes a LVDC microgrid in South Korea.
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Energy & Fuels
Hun-Chul Seo, Gi-Hyeon Gwon, Keon-Woo Park
Summary: The demand for low voltage DC distribution systems is rising due to advancements in power conversion technology and the expansion of DC-based technologies. This paper focuses on estimating fault sections in LVDC systems using wavelet transform, presenting an algorithm for fault section estimation and validating it through simulations. This method can be essential for developing protection schemes in LVDC distribution systems.
Article
Computer Science, Software Engineering
Omer Faruk Saritas, Serkan Ozturk
Summary: The proposed method involves separating the color image into different channels for watermarking processing, and then merging these channels to generate a watermarked color image, achieving robust protection while maintaining imperceptibility.
CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE
(2022)
Article
Computer Science, Information Systems
Vajiheh Sabeti
Summary: Although wavelet-based steganography techniques have advantages, complete extraction of embedded data remains a challenge. The proposed method resolves extraction errors by using an iterative embedding procedure and modifying coefficient pair values. With each iteration, errors diminish to zero in most blocks, and the method shows enhanced metrics and resistance to attacks. Key merits include high-quality stego images, strong security, simplicity, and zero extraction errors.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Computer Science, Information Systems
Sabyasachi Pramanik
Summary: This study proposes a hybrid method for hidden communication, combining spatial adaptive and wavelet-based approaches. The communication content is hidden by prioritizing embedding in the edge regions of the image. An edge intensity criterion is utilized based on local neighborhood analysis to determine suitable embedding coefficients. Experimental results show that this method is more secure and effective compared to previous methods, with better quality of the resulting hidden image.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Computer Science, Information Systems
Abdulhakeem O. Mohammed, Haval I. Hussein, Ramadhan J. Mstafa, Adnan M. Abdulazeez
Summary: With the rise of the Internet of Things and smart devices, it has become easier to access and distribute digital data. However, these advancements have also made it easier for intruders to violate copyright protection, commit identity theft, and compromise privacy. To address these issues, image watermarking, specifically a blind watermarking approach based on joint Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT) for RGB color images, is proposed in this paper. The approach demonstrates enhanced watermark invisibility and robustness, meeting the main requirements of image watermarking.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Le Liu, Aleksandra Lekic, Marjan Popov
Summary: This article proposes a robust non-unit traveling wave protection (TWP) technology for identifying DC fault areas and discriminating fault types under high impedance fault conditions. By using the traveling wave reflection and refraction method and discrete wavelet transform for time-frequency analysis, the proposed protection scheme can accurately identify and handle DC faults in a short period of time, and shows better performance compared to existing methods.
IEEE TRANSACTIONS ON POWER DELIVERY
(2023)
Article
Engineering, Electrical & Electronic
Gyuwon Kim, Donghyun Hwang
Summary: This article introduces an approach to utilize a barometric pressure sensor chip (BPSC) as a slip-detecting tactile sensor and explores its effectiveness with unknown objects. Through parametric analysis and experimental evaluation, the factors affecting slip detectability are investigated, and slip detection and direction detection are achieved using DWT and threshold methods. The experimental results demonstrate that stable and accurate grasping can be achieved using this sensor.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Information Systems
Ta Minh Thanh, Giang Ngoc Dan
Summary: This paper proposes a solution for digital image copyright protection using the combination of watermarking and visual encryption technique. Experimental results show that this method is more effective in the application of digital product copyright protection.
MULTIMEDIA TOOLS AND APPLICATIONS
(2022)
Article
Computer Science, Artificial Intelligence
Lokesh Malviya, Sandip Mal
Summary: This study proposes a hybrid deep learning model for detecting stress levels in humans using EEG signals. By utilizing DWT for signal denoising and decomposition, and combining CNN and BLSTM for feature selection and classification, the proposed method achieves high accuracy in detecting stress levels.
NEURAL COMPUTING & APPLICATIONS
(2022)
Review
Physics, Multidisciplinary
Rodrigo Capobianco Guido
Summary: Wavelet-based analyses have made remarkable achievements in physics and related sciences. However, many people still misunderstand the fundamentals of wavelets. This article provides clear explanations of different types of wavelet transforms and their applications, helping readers to effectively utilize wavelets in their research.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Energy & Fuels
L. Hallemans, S. Ravyts, G. Govaerts, S. Fekriasl, P. Van Tichelen, J. Driesen
Summary: In recent years, there has been increasing scientific interest in Low Voltage DC (LVDC) grids as an alternative to traditional Low Voltage AC (LVAC) grids. However, fault detection and protection of LVDC microgrids still present a significant challenge. This paper proposes a stepwise methodology for the design of fault protection strategies in LVDC microgrids, aiming to make the design process more straightforward and transparent, and to evaluate the robustness and boundaries of the designed protection strategy.
Article
Engineering, Electrical & Electronic
Sudipta Ghosh, Younes J. Isbeih, Syafiq Kamarul Azman, Mohamed Shawky El Moursi, Ehab El-Saadany
Summary: The placement of phasor measurement units (PMUs) in electrical networks is important for monitoring and controlling the system. This paper presents a coherent approach for solving the optimal PMU placement problem, considering multiple objectives and constraints. A two-stage approach is proposed to ensure numerical observability, and a novel online coherency grouping method is used to identify buses with ideal transient stability support.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Automation & Control Systems
Saurabh Shukla, Bhim Singh, Priyabrata Shaw, Ahmed Al-Durra, Tarek H. M. El-Fouly, Ehab F. El-Saadany
Summary: This article presents an analytical method for achieving maximum power point tracking (MPPT) in a solar photovoltaic (PV) array-based water pumping system using an induction motor drive (IMD). The method utilizes space vector pulsewidth modulation (SVPWM) to generate gating signals for a three-phase inverter. The proposed MPPT control scheme demonstrates fast dynamic performance and minimal overshoot in the water pumping system. It also provides robustness against variations in solar irradiance/parameters and ensures stability over a wide speed range of the IMD. The MPPT regulation is achieved by a boost converter, while the dc-link voltage regulation is assured by the three-phase inverter. The performance and robustness of the proposed MPPT control scheme are validated through laboratory experimentation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Aram Kirakosyan, Ehab F. El-Saadany, Mohamed Shawky El Moursi, Magdy M. A. Salama
Summary: This paper proposes a new control strategy to enhance the mutual frequency support between multi-terminal high voltage dc grids. By adding a feedback voltage-based loop and a voltage shifting term to the existing droop control structure, the proposed strategy nullifies the voltage error difference between adjacent converter stations. This strategy uses only local variables for control, does not rely on a high-bandwidth communication network, and is not affected by the change of ac systems' parameters.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Engineering, Electrical & Electronic
W. T. El-Sayed, Hany E. Z. Farag, Hatem H. Zeineldin, Ehab F. El-Saadany
Summary: This paper proposes a new model for optimal partitioning of active distribution networks into islanded microgrids. The objective is to create resilient islanded microgrids by maximizing the minimum loadability among formed islands. The model considers key aspects such as droop control, system tie-lines, and line capacity limit.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Computer Science, Information Systems
Nader A. El-Taweel, Hany E. Z. Farag, Gouri Barai, Hatem Zeineldin, Ahmed Al-Durra, Ehab F. El-Saadany
Summary: This article proposes a systematic and effective technique for feasibility check and configuration design of electrified public bus transit fleets, aiming to help public transport systems achieve decarbonization goals.
IEEE SYSTEMS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Biyadgie Ayalew, Mohamed Shawky El Moursi, Ehab F. El-Saadany
Summary: This paper proposes a new control strategy to enhance dc voltage regulation and transient response in the multi-terminal VSC-HVDC system. The strategy ensures quick power-sharing among converters during large disturbances and limits converter current during AC faults. A simplified model is also developed to analyze the performance of the strategy. Time-domain simulations validate the effectiveness of the proposed control strategy.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Ameen Hassan Yazdavar, Abdelsalam A. Eajal, Maher A. Azzouz, M. M. A. Salama, Ehab F. El-Saadany
Summary: Islanded microgrids have specific features that should be considered in harmonic analysis, including droop-based distributed generators, lack of slack bus, and voltage source converters. This paper introduces a sequential algorithm that takes these features into account and demonstrates its effectiveness through simulations.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Engineering, Electrical & Electronic
Aram Kirakosyan, Amir Ameli, Tarek H. M. EL-Fouly, Mohamed Shawky El Moursi, Magdy M. A. Salama, Ehab F. El-Saadany
Summary: This paper presents a novel control approach for the droop-controlled Voltage Source Converters (VSC) in Multi-Terminal High Voltage Direct Current (MTDC) systems. The frequency consensus controller is used to dampen inter-area oscillations and provide enhanced mutual frequency support. A new power-sharing control loop based on the proposed power deviation ratio (PDR) index is developed to distribute active power mismatches between the VSCs. Additionally, an equidistant voltage control (EVC) loop is proposed to regulate the dc system's voltages and increase the safety margin in voltage regulation.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Biyadgie Ayalew, Mohamed Shawky El Moursi, Ehab F. El-Saadany
Summary: This paper proposes a mutual frequency support strategy for ac grids connected by multi-terminal high voltage dc transmission system. The scheme ensures that the aggregated droop gains of the converters in the same ac grid are equal to the designed gains during ac side disturbance. It also introduces a threshold compensation strategy to eliminate the impact of frequency deviation on converters' control. The effectiveness of the proposed scheme is verified through rigorous simulation tests.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Mohsen Khalaf, Abdelrahman Ayad, Magdy M. A. Salama, Deepa Kundur, Ehab F. El-Saadany
Summary: This paper investigates the problem of cyber-attacks on Wide-Area Under-Frequency Load Shedding (WAUFLS) schemes and proposes a novel Reliable States WAUFLS (RSLS) scheme to protect against False Data Injection (FDI) attacks. The proposed scheme uses reliable system states obtained using a data-classification method on the Power Flow Measurements (PFMs) to perform disturbance calculation and load shedding. Extensive simulations on the IEEE-39 bus New England system validate the effectiveness and robustness of the RSLS scheme in evaluating system disturbance and performing load-shedding.
IEEE TRANSACTIONS ON SMART GRID
(2023)
Article
Thermodynamics
Ahmed Foda, Hatem Abdelaty, Moataz Mohamed, Ehab El-Saadany
Summary: Implementing battery electric buses (BEB) in transit operation can effectively reduce greenhouse gas emissions, but it faces challenges due to the interdependency of various system parameters. This study develops an optimization model that considers BEB cost, utility impact, and GHG emissions, optimizing the charging infrastructure, battery capacity, and charging schedule. The results show that both en-route and depot charging approaches are necessary, with different power capacities and charger quantities. The temporal variation of electricity time-of-use and GHG emissions intensity also greatly influence the charging strategy and system cost.
Article
Computer Science, Information Systems
Omniyah Gul M. Khan, Amr Youssef, Magdy Salama, Ehab Fahmy El-Saadany
Summary: The high penetration of distributed energy resources and heavy flexible loads has changed the operating conditions of the distribution network. This article proposes a deep deterministic policy gradient reinforcement learning scheme to alleviate congestion, which does not require explicit probabilistic models of the controllable loads. The results demonstrate the outperformance of the proposed technique in terms of the electricity cost and peak-to-average ratio of the load profiles.
IEEE SYSTEMS JOURNAL
(2023)
Article
Computer Science, Information Systems
Tarek Medalel Masaud, Ehab El-Saadany
Summary: This article proposes a comprehensive two-stage approach for optimal planning of battery storage systems (BSS) in a microgrid. The first stage formulates a mixed-integer linear programming (MILP) problem to determine the optimal size and degradation factor of the battery. The second stage formulates an MILP management problem for optimal scheduling and swapping of the BSS.
IEEE SYSTEMS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Omniyah Gul M. Khan, Amr Youssef, Magdy Salama, Ehab El-Saadany
Summary: Increased penetration of heavy loads is expected to cause congestion in distribution networks. A multi-objective optimization approach is proposed to schedule flexible load and alleviate potential congestion by minimizing consumers' electricity cost and decreasing the peak to average ratio of the load curve. Uncertainty analysis is performed to ensure the effectiveness of the proposed congestion management scheme. The results show that the proposed framework outperforms the existing scheme in terms of price reduction, load curve flattening, and congestion alleviation.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2023)
Article
Automation & Control Systems
Ahmad Mohammad Saber, Amr Youssef, Davor Svetinovic, Hatem H. Zeineldin, Ehab F. El-Saadany
Summary: This article proposes a scheme to protect LCDRs from cyberattacks such as direct-false-tripping, fault-masking, and sympathetic-tripping, by utilizing a trained deep neural network to differentiate between authentic and manipulated LCDR measurements. The proposed scheme accurately detects various forms of cyberattacks while maintaining the protective characteristics of LCDRs.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
