Article
Automation & Control Systems
Sajjad Sharifinia, Mehdi Allahbakhshi, Teymoor Ghanbari, Hossein Pakniat
Summary: This article proposes a new logic method for separating internal and external pulse interferences in transformer insulation systems. The method compares the voltage polarities of the output voltages from the Rogowski coil sensor mounted on the bushing and the measurement impedance connected to the test tap. The results demonstrate the effectiveness of this method in separating the pulses.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Wei Li, Pengcheng Yang, Keke Geng, Xiaoyuan Zhu
Summary: A fault-tolerant attitude tracking controller is proposed for a tandem rotor helicopter, considering external wind disturbance and internal actuator problem. The dynamic model for attitude control of the helicopter is constructed, taking into account actuator fault and saturation. A detailed wind load model is established based on statistical characteristics of practical wind condition and aerodynamic properties of the rotors. The proposed fault-tolerant attitude tracking controller combines nonsingular terminal sliding mode control with an adaptive super twisting algorithm to regulate the three angular motions simultaneously using two propeller rotors. Comparative simulation tests demonstrate the effectiveness and advantages of the proposed controller design using Quanser's 3-dof helicopter system.
INTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Tesfaye Amare Zerihun, Thomas Treider, Henning Taxt, Lars B. Nordevall, Thomas S. Haugan
Summary: This paper presents two novel methods for locating earth faults in isolated systems. The methods utilize existing current and voltage measurement data to calculate fault locations, without requiring additional devices or measurements. Simulation tests demonstrate the accuracy and feasibility of both methods.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Pharmacology & Pharmacy
Daniel Hoer, Hugh A. Barton, Alicia Paini, Michael Bartels, Brandall Ingle, Jeanne Domoradzki, Jeffrey Fisher, Michelle Embry, Philip Villanueva, David Miller, James Nguyen, Qiang Zhang, Stephen W. Edwards, Yu-Mei Tan
Summary: The internal concentration of environmental chemicals has a closer relationship with toxicological response than the external concentration. The methods of absorption, distribution, metabolism, and excretion determine the quantitative relationship between the two concentrations, and these processes can be saturated at high concentrations, resulting in non-linear changes. By using PBPK models, researchers can explore the influence of saturation on the relationship between internal and external concentrations, and also investigate the impact of different factors on this relationship.
TOXICOLOGY AND APPLIED PHARMACOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Pathomthat Chiradeja, Chaichan Pothisarn, Nattanon Phannil, Santipont Ananwattananporn, Monthon Leelajindakrairerk, Atthapol Ngaopitakkul, Surakit Thongsuk, Vinai Pornpojratanakul, Sulee Bunjongjit, Suntiti Yoomak
Summary: An algorithm combining DWT and PNN is proposed in this paper to discriminate internal and external faults in power transformers. By decomposing high-frequency fault components and using the maximum coefficient algorithm, accurate fault detection is achieved.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Lei Chen, Zekai Zhao, Xuefeng Qiao, Guocheng Li, Hongkun Chen
Summary: This paper proposes a novel current-limiting method based on the coordination of virtual impedance control (VIC) and resistive fault current limiter (R-FCL) for MMC-HVDC, which effectively decreases the DC fault current level and assists the DC circuit breaker (DCCB) in removing the fault reliably. The proposed approach shows better techno-economics and provides more efficient protection for the MMC-HVDC.
Article
Engineering, Electrical & Electronic
Martin Fritsch, Martin Wolter
Summary: This article aims to fill the research gap on the relationships between HFCT design and sensitivity/bandwidth, providing necessary information for HFCT development. By deriving and validating an analytical HFCT model, valuable analysis on the relationships between measurement and design parameters, as well as detailed information on sensor manufacturing process are provided.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Michael Lauria, Ruvini Navaratna, Dylan O'Connell, Anand Santhanam, Percy Lee, Daniel A. Low
Summary: Overall, the study found a strong correlation between diaphragm motion and the abdominal bellows signal, indicating that the torso surface can be used as an accurate surrogate for breathing. However, the accuracy varied across the surface and from patient to patient, highlighting the need for caution when using the surface as a surrogate. Future studies will explore algorithms that utilize the entire chest for more reliable results.
Article
Engineering, Electrical & Electronic
Qin Jiang, Baohong Li, Tianqi Liu, Peng Wang
Summary: A novel fault current limiting method based on LCC control strategy, namely the virtual impedance method, is proposed in this letter to address the commutation failure issue in HVDC systems. This method effectively limits fault current, improves high-frequency characteristics of the DC system, and saves construction costs. The theoretical analysis and simulations demonstrate the efficacy of this method in realizing fault current limitation.
ELECTRONICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Leming Zhou, Siyi Liu, Yandong Chen, Weilang Yi, Shuke Wang, Xiaoping Zhou, Wenhua Wu, Jie Zhou, Chan Xiao, Aoyang Liu
Summary: A coordinated suppression method for harmonic current and inrush fault current is proposed for virtual synchronous generators, utilizing passive and active branches along with improved VSG control to achieve effective suppression of both types of currents. The method successfully resolves the contradiction between harmonic current suppression and inrush fault current limitation, as validated by experimental results.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Anwarul Islam Sifat, Fiona J. Stevens McFadden, Joseph Bailey, Ramesh Rayudu, Arvid Hunze
Summary: Fault detection in electrical systems, especially in multi-branch distribution networks, remains a significant challenge, particularly for high impedance faults. This study characterizes a high impedance fault caused by a tree branch and validates the feasibility of giant magneto-resistive sensors for fault detection when located distant from overhead lines. The discovery of new fault characteristics and the application of signal processing techniques provide insights for developing new fault detection schemes in the future.
IEEE TRANSACTIONS ON POWER DELIVERY
(2021)
Article
Mathematics
Sophie Huczynska, Laura M. Johnson
Summary: We introduce the concept of disjoint partial difference families (DPDFs) and external partial difference families (EPDFs), which generalize the well-studied disjoint difference families (DDFs), external difference families (EDFs), and partial difference sets (PDSs). We establish properties and connections to other combinatorial structures. We demonstrate the construction of DPDFs and EPDFs from PDSs and present cyclotomic constructions for them. Additionally, we develop a unified cyclotomic framework that includes known results on PDSs, DDFs, and EDFs as special cases.
DISCRETE MATHEMATICS
(2023)
Article
Engineering, Mechanical
Xuejie Guo, Jinhua Zhang, Weichao Sun
Summary: This paper proposes a robust output feedback-fault tolerant control approach for active suspension to solve the vibration suppression problem under multiple constraints simultaneously. An auxiliary system is introduced to handle actuator saturation, and the faults, uncertainties, and disturbances are treated as lumped disturbance. A novel estimator is proposed to estimate the unavailable velocity signals and lumped disturbance with finite-time convergence. The designed disturbance compensation-based controller effectively controls the active suspension, as demonstrated by experimental studies.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Tianpeng Huang, Tieshan Li, C. L. Philip Chen
Summary: In this study, the upper bound of disturbance and physical parameters of a quadrotor system's attitude dynamics are estimated. The estimation result of the upper bound allows for the construction of a quadrotor controller without prior information of disturbance. An adaptive second-order saturation auxiliary system is proposed to compensate for saturation effect based on the parameter estimation result. A robust attitude trajectory tracking controller based on sliding mode approach is presented to stabilize the defined tracking error asymptotically. The effectiveness of the proposed controller is demonstrated through simulations.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Wanxing Sheng, Keyan Liu, Dongli Jia, Yao Wang
Summary: This paper proposes an improved HIF identification scheme based on a kernel extreme learning machine (KELM) for sensitive HIF detection and phase selection. The scheme utilizes discrete wavelet decomposition and Hilbert-Huang transform for fault feature extraction, XGBoost for feature selection, and an improved learning algorithm for accurate and sensitive HIF identification. Numerical simulations demonstrate the effectiveness and accuracy of the proposed scheme, which is more concise and correct compared to traditional methods.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Ehsan Rahmkhoda, Jawad Faiz, Moein Abedini
Summary: This paper investigates the failures and errors of loss-of-excitation (LOE) protection and proposes an intelligent method combined with a learning vector quantization (LVQ) neural network. The simulation results demonstrate that the proposed algorithm can detect LOE conditions quickly and prevent stresses applied to the machine and power system.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Andre M. Garcia, Leonardo H. Macedo, Ruben Romero
Summary: This article presents a specialized scatter search algorithm to solve the optimal transmission switching problem considering voltage control, and its efficiency is validated through tests.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Adel F. Alrasheedi, Khalid A. Alnowibet, Ahmad M. Alshamrani
Summary: This paper studies the bidding strategy problem of microgrid in a day-ahead electricity market. The DA electricity prices, demand, and uncertainties are modeled using different scenarios and robust optimization. A smart predict-and-optimize methodology is proposed, where a cost-oriented prediction model is used to replace accuracy-oriented methods. The trilevel mathematical programming approach is utilized to construct a cost-oriented model and solve the problem.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Depin Lv, Qiusheng Yu, Xiaoyong Wang, Yulian Bo, Yongjing Wei, Lei Liu, Pu Zhang, Yan Zhang, Wensheng Zhang
Summary: This study proposes a method based on the MHA-CNN framework to monitor the operation status of the smart grid and power communication network coupling. The method utilizes HHT to extract features from operational data and employs MHA to extract key feature information from fault data, achieving faster fault detection speed and higher detection probability.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Tao Zhang, Zhiguo Hao, Hongyue Ma, Songhao Yang, Chongtao Li
Summary: This paper introduces a dominant mode identification (DMI) method to assess the stability of grey-box grid-tied converters. The method analyzes the critical eigenvalues and can be applied to different grid connection scenarios.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Aamir Nawaz, Hongtao Wang, Huiting Yang, Hammad Armghan, Jiechao Gao
Summary: This paper presents a risk constrained probabilistic problem framework for addressing the challenges of stochastic dispatching due to contingencies and the integration of renewable sources. By utilizing probabilistic analytical target cascading, polynomial chaos expansion, and benders decomposition algorithm, the proposed method reduces computational burden and improves efficiency.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Thongchart Kerdphol, Issarachai Ngamroo, Tossaporn Surinkaew
Summary: This paper introduces an enhanced robust H-infinity technique to improve the regulation performance and cyber resiliency of secondary frequency control in a microgrid. The study shows that cyber-attacks affect different elements of secondary frequency control in the microgrid depending on the type of attack used.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Sambeet Mishra, Praveen Prakash Singh, Ivar Kiitam, Muhammad Shafiq, Ivo Palu, Chiara Bordin
Summary: This study aims to analyze partial discharge events in high-voltage cables and extract patterns and trends. The results indicate a positive correlation between the number of PD events and the increase in voltage levels, with negative PD peaks being more frequent at lower stress levels.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Cleberton Reiz, Jonatas B. Leite, Clara S. Gouveia, Mohammad Sadegh Javadi
Summary: This research proposes a bilevel method to simultaneously solve the allocation and coordination problems in microgrid protection, considering local devices. The results show that solving these problems simultaneously can save costs and select the optimal solution.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Rasha Elazab, M. Ser-Alkhatm, Maged A. Abu Adma, K. M. Abdel-Latif
Summary: This paper proposes a two-layer methodology for the allocation and sizing of SVCs in radial distribution systems. The Power Loss Index (PLI) is used to choose the best candidate buses for allocating SVCs, and a two-stage stochastic programming algorithm is proposed to solve the sizing problem. The advantages of combining SVCs and the PV inverter's reactive power provision ability are also analyzed.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Samreen Javaid, Dongyu Li, Abhisek Ukil
Summary: This paper introduces a new algorithm based on high pass filter for traveling wave fault location, which can differentiate the peak value of the traveling wave more easily by removing oscillation in the signal. The algorithm is tested on a DC simulation model and executed in MATLAB environment, achieving high accuracy in fault location results. Compared with traditional methods, this algorithm shows higher accuracy and faster response.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Enzhe Wang, Xiangrong Chen, Hanshan Zhu, Kai Yin, Muhammad Awais, Ashish Paramane
Summary: This paper aims to reduce the power loss of tunnel cable systems by using different grounding and loss reduction methods. The case study of the submarine tunnel power cable project in Ningbo-Zhoushan, China is considered. The nodal admittance matrices of the cable are established using the telegraph equation, and the cascading algorithm is used to analyze the induced voltage and circulating current in the cable sheath, taking into account the presence of grounding node. The study finds that coordinating the amplitude and phase angle of series impedance can reduce the power loss of the cable system.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Ziwei Ma, Jasronita Jasni, Mohd Zainal Abidin Ab Kadir, Norhafiz Azis
Summary: A numerical model was developed to analyze lightning attachment on UHV-AC double-circuit transmission lines. Simulation results showed that upward leaders simultaneously occurred on the ground wire and the upper-phase conductor when the phase conductors were energized. A new expression for calculating the striking distance on the ground wire was proposed based on the simulation results. Additionally, high voltage, phase angle, and terrain slope were found to increase the surface electric field of the upper-phase conductor.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Kunal Kumar, Susmita Kar
Summary: This paper presents an efficient protection scheme utilizing the rate of change parameter to detect both shunt faults and high impedance faults. By comparing with the existing scheme and testing on the IEEE 13 Bus test system, the effectiveness of the proposed scheme is demonstrated.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)
Article
Engineering, Electrical & Electronic
Cheng Che, Bangbang He, Zhixuan Gao, Qiwei Lu, Yang Chen, Zhifeng Wang, Jinghan Guo, Yanwen Wang
Summary: A low-cost hybrid railway power conditioner (HRPC) technology scheme is proposed in this paper to effectively compensate negative sequence current (NSC) of the V/v traction system and reduce the capacity and cost of the railway power conditioner (RPC). The proposed HRPC combines an RPC with a modular multilevel converter structure (MMC-RPC) and a railway static var compensator (RSVC) and considers regenerative braking energy in the compensation process.
ELECTRIC POWER SYSTEMS RESEARCH
(2024)