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Prospects for Using of New Types of Current Transformers for Differential Protection for Transformers

Prospects for Using of New Types of Current Transformers for...

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2023 International Conference on Industrial engineering, Applications and Manufacturing, ICIEAM 2023

作者： Yablokov, Andrey Panashatenko, Anton Tychkin, Andrey Ivanovo State Power Engineering University Ispu Department of Electric Power Systems Automatic Control Ivanovo Russia

ISBN: (纸本)9781665475952

The article is devoted to the analysis of the possibilities of improving the methodology for selecting the operation parameters of the longitudinal differential protection of a power transformer when using new types of current transformers such Rogowski Coils, optical current transformers (including digital ones) and their combinations with traditional current transformers. The results of studies of the characteristics of digital transformers are presented, also the heat, repeatability of construction and continuous operating conditions influence on it are shown. Based on anlysis for these studies possible improvements in the methodology for selecting the operation parameters of the differential protection of the transformer are proposed. These improvements can increse the sensitivity and reliability for differential transformer protection. © 2023 IEEE.

关键词： Electric instrument transformers

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High-Speed Operational Amplifier Based on a Modified 'Folded' Cascode

High-Speed Operational Amplifier Based on a Modified 'Folded...

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2024 IEEE Ural-Siberian Conference on Biomedical engineering, Radioelectronics and Information Technology, USBEREIT 2024

作者： Kuznetsov, Dmitry Titov, Alexey Prokopenko, Nikolay Butyrlagin, Nikolay Don State Technical University Department Of Information Systems And Radio Engineering Rostov-on-Don Russia Southern Federal University Department Of Automatic Control Systems Rostov-on-Don Russia

ISBN: (纸本)9798350362893

A CBjT high-speed operational amplifier (op-amp) has been developed and studied, which differs from known in its modified input stage (IS), as well as the architecture of the intermediate 'folded' cascode (FC). The proposed circuits IS and FC circuits solve the problem of increasing the maximum slew rate of the output voltage (SR) in large-signal mode by more than 10 times. In the LTspice environment, computer simulation of an op-amp on complementary bipolar transistors was performed, which shows that the use of the developed transient correction circuits makes it possible to increase SR from 103 V/μs to 1408 V/μs. The logarithmic amplitude-frequency characteristics of the op-amp under study are given for different options for its inclusion - with and without general negative feedback. The leading and trailing edges of the op-amp transient process were studied with an input rectangular pulse signal with an amplitude of 5V at different values of the capacitance of the additional correction capacitor Ck1. The simulation results are presented in the form of a table that establishes the relationship between the numerical values of the maximum rate of rise of the output voltage of the op-amp and the capacitance Ck1. The considered op-amp is recommended for use in various automation devices and communication systems, for example, discrete-analog filters on switched capacitors, high-speed ADC drivers, etc. © 2024 IEEE.

关键词： Operational amplifiers

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A Review on Defense Mechanism against the Denial of Service and False Data Injection in Cyber-Physical Power systems 6

A Review on Defense Mechanism against the Denial of Service ...

引用

6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Zhou, Zhuoran Zhang, Jinning Zhang, Xin University of Sheffield Department of Automatic Control and Systems Engineering Sheffield United Kingdom School of Engineering University of Leicester Leicester United Kingdom

ISBN: (纸本)9798350346671

Cyber-physical power system (CPPS), with its bi-directional power and information flows, is considered as the next generation of widely distributed and automated electrical power network. However, CPPS is vulnerable to malicious cyberattacks that can cause significant operational risk and financial loss to stakeholders, such as electricity system operators. The complexity of vulnerabilities, which arises from the heterogeneity and interdependency of physical and cyber domains, will present substantial challenges for the detection and prevention of cyberattacks. This paper provides a comprehensive review of the defense mechanisms in CPPS against coordinated and widespread cyberattacks. The most prevalent cyberattacks in the CPPS are denial-of-service (DoS) and false data injection (FDI) attacks. This paper examines the state-of-the-art prevention, detection, and mitigation technologies for these major mainstreams and coordinated cyberattacks. In particular, the advantages and disadvantages of popular cyberattack prevention sciences such as Game Theory, Optimization, control Theory, and Data-driven method are discussed. It reveals that cyberattack detection techniques have evolved from traditional state estimation to artificial intelligence-based methods. Finally, the challenges and opportunities for future research on cybersecurity in CPPS are identified. © 2023 IEEE.

关键词： Game theory

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Prediction of Radiated Electromagnetic Interference Based on Four-module Motor Drive System 6

Prediction of Radiated Electromagnetic Interference Based on...

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6th International Conference on Energy, Power and Grid, ICEPG 2024

作者： Shi, Yixin Chen, Wenjie Li, Fengjiao Kan, Jinpeng Meng, Yongqing Yang, Guang Xi'an Jiaotong University School of Electrical Engineering Xi'an China Avic Xi'an Flight Automatic Control Research Institute Department of Computer and Electronic Systems Engineering Xi'an China

ISBN: (纸本)9798350377798

In recent years, wide bandgap semiconductor devices such as silicon carbide (SiC) and gallium nitride (GaN) have been increasingly applied in electric drive systems, effectively enhancing system power density. However, the high-frequency and high-speed characteristics of SiC devices exacerbate electromagnetic interference (EMI) issues within the system. Additionally, the cables in electric drive systems exhibit significant antenna effects, radiating conducted EMI into the surrounding space, thereby affecting the normal operation of other sensitive equipment. Therefore, it is essential to research motor drive system topologies that can actively suppress EMI and predict radiated interference in motor drive systems. The topology of a four-module motor paired with parallel inverters can achieve active suppression of EMI at the source. This paper conducts a simulation-based prediction of radiated interference for a parallel inverter-driven four-module motor system. It analyzes the coupling mechanisms of common mode and differential mode radiated interference and validates the radiated interference from both DC and AC cables through simulations, predicting the impact on surrounding sensitive equipment in practical systems. © 2024 IEEE.

关键词： Gallium nitride

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A Novel Zero Common-Mode Voltage Modulation Strategy for Dual Three-Phase PWM Inverter Based on Unified Voltage Modulation 4

A Novel Zero Common-Mode Voltage Modulation Strategy for Dua...

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4th International Conference on Energy, Power and Electrical engineering, EPEE 2024

作者： Kan, Jinpeng Meng, Yongqing Li, Changyi Chen, Wenjie Li, Fengjiao Shi, Yixin Xi'an Jiaotong University School of Electrical Engineering Xi'an China Avic Xi'an Flight Automatic Control Research Institute Department of Computer and Electronic Systems Engineering Xi'an China

ISBN: (纸本)9798331518066

Power electronic switching devices and pulse width modulation (PWM) not only improves the performance of motor drive systems, but also brings about common-mode voltage (CMV) issues, that challenging the normal operation of the system. This article proposes a zero common-mode voltage modulation strategy based on unified voltage modulation for a 60° Y-connected six-phase permanent magnet synchronous motor system driven by a dual three-phase inverter. The theoretical basis and zero common-mode implementation scheme of unified modulation are analyzed, and the effectiveness of the proposed zero common-mode voltage modulation strategy is finally verified through simulation. © 2024 IEEE.

关键词： Pulse width modulation

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Holistic Self-Distillation with the Squeeze and Excitation Network for Fine-grained Plant Pathology Classification 26

Holistic Self-Distillation with the Squeeze and Excitation N...

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26th International Conference on Information Fusion, FUSION 2023

作者： Su, Jingxuan Anderson, Sean Mihaylova, Lyudmila University of Sheffield Department of Automatic Control & Systems Engineering S1 3JD United Kingdom

ISBN: (纸本)9798890344854

Fine-grained plant pathology classification is an important task for precision agriculture, but at the same time, it is challenging due to the subtle difference in plant categories. Variances in the lighting conditions, position, and stages of disease symptoms usually lead to degradation of classification accuracy. Knowledge distillation is a popular method to improve the model performance to deal with the indistinguishable image classification problem. It aims to have a well-optimised small student network guided by a large teacher network. Existing knowledge distillation methods mainly consider training a teacher network that needs a high storage space and considerable computing resources. Self-knowledge distillation methods have been proposed to distil knowledge from the same network. Although self-knowledge distillation saves time and space compared with knowledge distillation, it only learns label knowledge. In this paper, we propose a novel self-distillation method to recognize the fine-grained plant category, which considers holistic knowledge based on the Squeeze and Excitation Network. We label this new method as holistic self-distillation because it captures knowledge through spatial features and labels. The performance validation of the proposed approach is performed on two public fine-grained plant datasets: Plant Pathology 2021 and Plant Pathology 2020 with the accuracy of 98.22% and 90.72% respectively. We also present experiments on the state-of-the-art algorithm (ResNet-50). The classification results demonstrate the effectiveness of the proposed approach with respect to accuracy. © 2023 International Society of Information Fusion.

关键词： Distillation

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A Novel Random Pulse Width Modulation for PMSM Drive System Based on Unified Voltage Modulation 6

A Novel Random Pulse Width Modulation for PMSM Drive System ...

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6th International Conference on Energy, Power and Grid, ICEPG 2024

作者： Kan, Jinpeng Meng, Yongqing Shi, Yixin Li, Fengjiao Chen, Wenjie Li, Changyi Xi'an Jiaotong University School of Electrical Engineering Xi'an China Avic Xi'an Flight Automatic Control Research Institute Department of Computer and Electronic Systems Engineering Xi'an China

ISBN: (纸本)9798350377798

The electromagnetic interference (EMI) problem caused by power electronic switching devices and pulse width modulation (PWM) affects the normal operation of the motor drive system. In this paper, a random PWM based on unified modulation is proposed for permanent magnet synchronous motor (PMSM) drive system. The theoretical basis of unified modulation and the implementation scheme of random modulation are analyzed. Finally, the effectiveness of the proposed random PWM is verified by simulation. © 2024 IEEE.

关键词： Pulse width modulation

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Segmentation of Retina Vessels in 2D OCT-Reconstructed Fundus Images with 3D UNet 26

Segmentation of Retina Vessels in 2D OCT-Reconstructed Fundu...

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26th IEEE Signal Processing: Algorithms, Architectures, Arrangements, and Applications, SPA 2023

作者： Marciniak, Tomasz Stankiewicz, Agnieszka Zaradzki, Przemyslaw Poznan University of Technology Division of Electronic Systems and Signal Processing Institute of Automatic Control and Robotics Department of Control Robotics and Electrical Engineering Poznan Poland

ISBN: (纸本)9798350304985

This paper presents an analysis of the effectiveness of blood vessel segmentation in human retinal images. The segmentation process was carried out for three-dimensional optical coherence tomography (OCT) scans using the author's publicly available CAVRI-C database. A 3D version of the U-Net artificial neural network was used. Various dimensions of the input blocks were investigated to determine their influence on the segmentation process. The effectiveness of the proposed solutions was evaluated using various metrics and the results obtained were compared with the 2D solution, also based on neural networks. The use of the proposed solutions allowed us to improve the segmentation even by 15% (in the case of the F1-score). © 2023 Division of Signal Processing and Electronic systems, Poznan University of Technology (DSPES PUT).

关键词： Optical tomography

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Learning control laws in simulated environments for motion gestures of humanoid robots 24

Learning control laws in simulated environments for motion g...

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24th International Conference on control systems and Computer Science, CSCS 2023

作者： Mateescu, Andrei Stefan, Ioana-Livia Popescu, Dragos Constantin Sacala, Ioan Stefan Raileanu, Silviu University Politehnica of Bucharest Automatic Control and Systems Engineering Faculty of Automatic Control and Computers Splaiul Independentei No. 313 Bucharest060042 Romania University Politehnica of Bucharest Automation and Industrial Informatics Faculty of Automatic Control and Computers Splaiul Independentei No. 313 Bucharest060042 Romania

ISBN: (纸本)9798350313390

This article presents a way to implement a collection of fitness moves on an iCub (Cognitive Universal Body) robot, whose objective is to act as a fitness instructor and interact with humans. Due to the advantages of a simulation medium, the robot is simulated in the Gazebo simulator, on The Construct online platform. The control is done using Robot Operating System (ROS) with PID controllers for the robot joints, with the proportional, integral and derivative parameters tuned using a Genetic Algorithm. The scripts for the collection of moves and the algorithm used to tune the PID controllers are written in Python. © 2023 IEEE.

关键词： Python

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Counting assistant through multi-sensor fusion for inventory monitoring 27

Counting assistant through multi-sensor fusion for inventory...

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27th International Conference on Automation and Computing, ICAC 2022

作者： Lin, Ruofan Tiwari, Ashutosh Oyekan, John The University of Sheffield Department of Automatic Control and Systems Engineering Sheffield United Kingdom

ISBN: (数字)9781665498074

ISBN: (纸本)9781665498074

A large number of parts are used in the production activities of the assembly plant. The quantity and quality of these parts in the process of transportation, distribution, use, and recycling in the factory have an impact on production. With large amount of parts and tools, how to provide the right types and quantity of parts at the time and right location becomes the key to business success. The traditional method uses manpower which is costly and time-delayed. Previous single sensor monitoring has its own limitations. For example, weight recognition is hard to determine when multiple type items are mixed. Visual identification is susceptible to problems such as occlusion and difficulty in identifying dense areas and every item needs to be tagged by using RFID. Therefore, this paper introduces the multi-sensor method, which uses a mathematical approach to fuse weight and visual data to predict different types and quantities of parts in small containers. This study also provides a case study, simulated classification and counting of Aircraft General Standard(AGS) parts, which are mainly fasteners. They are small in size, expensive, and difficult to identify by a single sensor. Fusion results show up to 80% in average accuracy which is an improvement over single vision(73%) and weight detection up to 50%. © 2022 IEEE.

关键词： Aircraft

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