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4th IEEE KhPI Week on Advanced Technology, KhPI Week 2023

作者： Pavlenko, Volodymyr Dromenko, Valeria Kurliak, Petro Volianyk, Oleksii Batsala, Yaroslav Horiashchenko, Serhiy Department of Information and Computer Technologies Kyiv National University of Technologies and Design Kyiv Ukraine Department of Electrical Power Engineering Ivano-Frankivsk National Technical University of Oil and Gas Ivano-Frankivsk Ukraine Department of Mechanical Engineering Kyiv National University of Technologies and Design Kyiv Ukraine Department of Machines and Devices Electromechanical and Energy Systems Khmelnytskyi National University Khmelnytskyi Ukraine

ISBN: (纸本)9798350395532

The paper introduces a computer-integrated system designed for the automatic control in centrifuges with variable imbalance. The system comprises a microcontroller, a Hall sensor, a computer-oriented Bond Graph model of an asynchronous motor, and a control program. The control program utilizes a proposed algorithm to monitor the nominal and critical values of the centrifuge drive current while continuously recording and observing the current. If there is an increase in the current, the system automatically resets the revolutions by 10%, aiming to minimize vibration amplitude during transient rotational modes. Subsequently, the system oversees the permissible current limit and engine load to ensure stable operation. © 2023 IEEE.

关键词： Induction motors

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Optimal Decomposition of Stochastic Dispatch Schedule for Renewable Energy Cluster

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Journal of Modern power systems and Clean Energy 2021年第4期9卷 711-719页

作者： Yue Yang Wenchuan Wu Bin Wang Mingjie Li Tao Zhu State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China National Electric Power Control Center of State Grid Corporation of China BeijingChina Kunming Electric Power Supply Company of Yunnan Power Grid Corporation KunmingChina

The correlated renewable energy farms are usually aggregated as a cluster in economic dispatch to relieve computational *** strategy can also achieve better performance since the precision of predicting the power generation of a cluster can be higher than those of individual *** paper proposes an optimal decomposition method to allocate dispatch schedules among renewable energy farms(REFs)in the cluster under existing stochastic optimization *** proposed model takes advantage of probabilistic characteristics of renewable generation to minimize the curtailment and ensure the feasibility of dispatch schedule of the *** tractable formulation and efficient solution method are the proposed to solve the proposed *** tests show that the proposed method achieves the optimal decomposition of dispatch schedule among REFs and facilitates the utilization of renewable generation.

关键词： Renewable energy stochastic optimization economic dispatch decomposition of dispatch schedule

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Physical and Mathematical Modeling of Impedance-Based Fault Location Utilizing Synchrophasor Measurements 4

Physical and Mathematical Modeling of Impedance-Based Fault ...

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4th International Youth Scientific and Technical Conference Relay Protection and Automation, RPA 2021

作者： Yablokov, A.A. Ivanov, I.E. Tychkin, A.R. Kulikov, F.A. Murzin, A.Yu. Ivanovo State Power Engineering University Department of Electric Power Systems Automatic Control Ivanovo Russia Ivanovo State Power Engineering University Department of Electric Power Systems Ivanovo Russia

ISBN: (纸本)9781728192703

The focus of this paper is on the impedance-based transmission line fault location via synchronized phasor measurements. Physical and mathematical modeling involving real-time digital simulations is utilized to show that synchrophasor-based fault location is promising for extra-high voltage overhead transmission lines. A variety of single-end and double-end fault location methods are put together to show that the fault location accuracy can be well within 1-2 % for both P and M class filters defined in the IEEE C37.118 synchrophasor standard. The analysis is carried out for a reliable 750 kV line model built in the ATPDraw software along with an electric grid model with 500, 330, and 220 kV overhead lines sharing the same right-of-way. Unlike many other publications, no Fourier-simulated phasors under transients are exploited. Instead, we resort to physical modeling involving hardware equipped with synchrophasor functionality. An experimental setup is described, and future research directions are highlighted. © 2021 IEEE.

关键词： Location

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Simultaneous Estimation of Human Motion Intention and Time-Varying Arm Stiffness for Enhanced Human-Robot Interaction

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IEEE Transactions on Cognitive and Developmental systems 2024年第3期17卷 510-524页

作者： Wu, Huayang Zhu, Chengzhi Cheng, Long Yang, Chenguang Li, Yanan University of Sussex Department of Engineering and Design BrightonBN1 9RH United Kingdom South China University of Technology Key Laboratory of Autonomous Systems and Networked Control College of Automation Science and Engineering Guangzhou510640 China Chinese Academy of Sciences State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of Automation Beijing100190 China University of Chinese Academy of Sciences School of Artificial Intelligence Beijing100049 China University of Liverpool Department of Computer Science LiverpoolL69 3BX United Kingdom

Recent advances in physiological human motor control research indicate that human endpoint stiffness magnitude increases linearly with grasp force. Based on these findings, a scheme was proposed in this paper to integrate the linear quadratic estimation (LQE) filter with the stiffness model inferred from grasp force, which can simultaneously estimate the human arm's stiffness and motion intention. Then, an online variable impedance controller (VIC) was designed based on previous estimations for physical human-robot interaction (pHRI). The proposed stiffness model and estimation method were validated through experiments using a planar robotic interface. In order to assess its performance in practical pHRI tasks, the implementation of human arm stiffness and intention estimation combining with VIC was extended to a teleoperation peg-in-hole and robot-assisted rehabilitation tasks. The experimental results demonstrate that the proposed method can effectively estimate human motion intention and arm stiffness simultaneously. Compared to existing methods, the proposed VIC enhances pHRI in terms of increased flexibility, effective guidance, and reduced human effort. © 2016 IEEE.

关键词： Human robot interaction

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Converter-Fed Induction Motor Efficiency Measurements - IEC 60034-2-3

Converter-Fed Induction Motor Efficiency Measurements - IEC ...

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2024 International Conference on Electrical Machines, ICEM 2024

作者： Tiihonen, Matias Karkkainen, Hannu Aarniovuori, Lassi Niemela, Markku Liu, Dong Barta, Jan Laboratory of Electrical Drives Technology LUT University Lappeenranta Finland Laboratory of Electrical Drives Technology LUT University Lahti Finland LUT University Laboratory of control engineering and digital systems Lappeenranta Finland Brno University of Technology Department of Power Electrical and Electronic Engineering Brno Czech Republic

ISBN: (纸本)9798350370607

Induction motors consume huge amount of energy, so their energy efficiency is an important topic. The efficiency determination methods of direct-on-line motors are mature and during the last decade efforts have been made to create a standardized way to also determine efficiency of converter-fed motors. Here the efficiency determination methods given in IEC 60034-2-3 are utilized using a modern induction motor with the rated power of 7.5 kW and compared with the sinusoidal supply results. In addition, the high frequency harmonic power is extracted from the measured active power and its behavior as a function of the frequency and torque is illustrated. © 2024 IEEE.

关键词： comparison of standard methods energy efficiency frequency converter Induction motor measurements standardization

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Validation of Moment Monitoring Results in Rolling Mill Stand Spindles

Validation of Moment Monitoring Results in Rolling Mill Stan...

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2024 International Russian Smart Industry Conference, SmartIndustryCon 2024

作者： Gasiyarova, Olga A. Loginov, Boris M. Radionov, Andrey A. Gasiyarov, Vadim R. Khramshin, Vadim R. Llc Npp Uchtekh-Profi Department of Material Science Chelyabinsk Russia Magnitogorsk Iron and Steel Works Magnitogorsk Russia Moscow Polytechnic University Department of Automation and Control Moscow Russia Power Engineering and Automated Systems Institute Nosov Magnitogorsk State Technical University Magnitogorsk Russia

ISBN: (纸本)9798350395044

The authors highlight the need for the development and industrial deployment of online monitoring systems for the elastic moment on the rolling mill stand spindles. An example of a 5000 plate mill was used to demonstrate that these systems are made due to the need for a reliable moment assessment in dynamic modes. This problem is relevant for the development of control systems limiting the maximum (amplitude) values of moments when the workpieces enter the stand. The shock loading causes a multifold increase of the dynamic moment over the steady rolling moment. This results in the fatigue breakdown of spindle connections., as well as mill failures and emergency stops. The authors provide information on a telemetric elastic moment monitoring system installed on a 5000 mill. The data were validated in the industrial context. To achieve this, the authors propose a procedure where experimental research is carried out in two stages. During the first stage, the electromagnetic moment of the motor is compared to the spindle moment in the quasi-steady rolling mode when the elastic properties of the spindle are not manifested. During the second stage, the elastic moments of the upper and lower roll motors are assessed during 9 passes of reverse rolling. Some conclusions are made about the proportion of roll motor loads, spindle moment amplitudes, and the relevance of aligning rolling moments through the improvement of electric drive speed control algorithms. © 2024 IEEE.

关键词： Ductile fracture

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Combustion performance optimization of marine diesel-natural gas dual-fuel engines under low operation loads 3

Combustion performance optimization of marine diesel-natural...

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2024 3rd International Conference on New Energy, Energy Storage and power engineering, NESP 2024

作者： Ding, Yu Farrugia, Mario Peng, Yang Xiang, La Scerri, Kenneth College of Power and Energy Engineering Harbin Engineering University Heilongjiang Province Harbin150001 China Department of Mechanical Engineering University of Malta MSD Msida2080 Malta Technical Centre Henan Diesel Engine Industry Co. Ltd. Henan Province Luoyang471000 China Department of Systems and Control University of Malta MSD Msida2080 Malta

With the increasingly stringent IMO emission regulations, the diesel-natural gas dual-fuel engine is gradually applied to ship's power systems. However, the misfire and unconventional emissions of dual-fuel engines under low operation loads limit its application. In this study, a marine diesel/natural gas dual-fuel engine was used as a prototype to develop a 3D CFD simulation model using CONVERGE, which was then validated by using the experimental data under different operation loads. The validated model was used to study the effect of injection timing, intake temperature, and EGR rate on the combustion and emission characteristics under low operation loads soon afterward. The effects of different operating parameters on engine performance and emissions were determined by observing the formation of combustion intermediates and in-cylinder temperature variation. Results show that under small load conditions, advancing diesel injection timing and increasing intake temperature can reduce the emissions of HC and CO while improving the misfire phenomenon partly, but NOx increases. A larger EGR rate can effectively reduce NOx emissions but cause an increase in unconventional emissions. After optimization, the effective power increased by 5.9%, while the HC and CO emissions decreased by 33.1% and 35.2%, respectively. The misfire phenomenon under low operation loads has been significantly improved, thus providing theoretical support for the de sign and operation of dual-fuel engines. © Published under licence by IOP Publishing Ltd.

关键词： Dual fuel engines

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Comparative Study of Advanced Heatsink Structures for Improved Thermal Performance in Axial Flux Motors

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IEEE Access 2025年 13卷 100850-100860页

作者： Sarap, Martin Singh, Shalini Kallaste, Ants Qureshi, Ahmed Tiismus, Hans Vaimann, Toomas Ghahfarokhi, Payam Shams Tallinn University of Technology Department of Electrical Power Engineering and Mechatronics Tallinn 19086 Estonia University of Alberta Additive Design and Manufacturing Systems Lab Department of Mechanical Engineering Faculty of Engineering Edmonton Canada Tampere University Electrical Engineering Unit Tampere 33014 Finland

Additive manufacturing has enabled the use of advanced geometries such as lattice-structures in heatsinks. This study investigates the thermal performance of various advanced heatsink designs in the context of cooling the windings of an axial flux motor using active air cooling. Physical samples of the heatsinks are additively manufactured from an aluminum alloy and tested under realistic airflow conditions. The heatsink designs are compared against an optimized conventional finned geometry based on the measured thermal resistance at a given fan speed. This ensures that the results are representative of real-world use cases and applicable in practical solutions. The results indicate that airfoil-shaped pins can slightly outperform conventional straight fins in thermal resistance while weighing less. In terms of mass-based relative performance, the rhombi octet lattice structure outperformed the other prototypes. These findings reinforce conventional design principles in terms of absolute performance while suggesting that lattice structures can provide higher relative performance in certain weight sensitive applications. © 2013 IEEE.

关键词： Heat sinks switched reluctance motors three-dimensional printing

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A Model of 6-10 kV power Three-Core Cable for the Research of ITS Heating-Up in Normal and Emergency Operating Modes 4

A Model of 6-10 kV Power Three-Core Cable for the Research o...

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4th International Youth Scientific and Technical Conference Relay Protection and Automation, RPA 2021

作者： Kutumov, D.Yu. Mizonov, V.E. Yu, Shadrikova T. Shuin, V.A. Ivanovo State Power Engineering University Automatic Control of Electrical Power Systems Department Ivanovo Russia

ISBN: (纸本)9781728192703

One of the most significant consequences of short circuits and single phase to earth faults in 6-10 kV cable networks is cable insulation heating, which provides its further deflagration and damage of neighboring power supply systems' elements, which steps up consequential injury. Cable lines overheating during current overload leads to rapid insulation deterioration and cable lines damage rate increasing;similarly, cable heating during single phase to earth faults leads to its transformation to phase-to-phase short circuit, which requires faulted cable line emergency shutdown by relay protection devices operation and, moreover, can aid in cable deflagration when it is installed inside cable tunnels. Reference documents contain several calculation methods for cable line temperature definition both in steady-state and transient modes [1,2]. The main disadvantages of these methods are sufficiently restricted application sphere (only for symmetrical modes) and impossibility for accurate records of thermal conductivity and other thermophysical and geometric parameters of the researched cable line and external environment (soil, air, etc). For the solution of this problem an approach, which was described by F.H. Van Wormer in the 1950s [3] and also mentioned in [4-6], exists. According to this approach, the heated cable line and external environment are presented in the form of equivalent RC-branches, which simulates the process of transition and accumulation of heat. Nevertheless, during composition of such models an issue of computational space size and appropriate sampling rate of elementary RC-branches definition occurs. The model of cable line and external environment on the basis of so-called 'Markov's chains' [for example, 5] is also the case of interest, because it will allow to research qualitative characteristics of the system 'cable line-the external environment' in the context of its electromagnetic heating. The main goal of this research is to compile a digi

关键词： Thermal conductivity

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Flow and thermal modeling of liquid metal in expanded microchannel heat sink

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Frontiers in Energy 2023年第6期17卷 796-810页

作者： Mingkuan ZHANG Xudong ZHANG Luna GUO Xuan LI Wei RAO Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin 300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of TechnologyTianjin 300384China Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084China School of Mechanical Engineering Tianjin University of CommerceTianjin 300134China Institute of Refrigeration and Cryogenics Shanghai Jiao Tong UniversityShanghai 200240China Beijing Key Laboratory of CryoBiomedical Engineering and Key Laboratory of Cryogenics Beijing 100190China

Liquid metal-based microchannel heat sinks (MCHSs) suffer from the low heat capacity of coolant, resulting in an excessive temperature rise of coolant and heat sink when dealing with high-power heat dissipation. In this paper, it was found that expanded space at the top of fins could distribute the heat inside microchannels, reducing the temperature rise of coolant and heat sink. The orthogonal experiments revealed that expanding the top space of channels yielded similar temperature reductions to changing the channel width. The flow and thermal modeling of expanded microchannel heat sink (E-MCHS) were analyzed by both using the 3-dimensional (3D) numerical simulation and the 1-dimensional (1D) thermal resistance model. The fin efficiency of E-MCHS was derived to improve the accuracy of the 1D thermal resistance model. The heat conduction of liquid metal in Z direction and the heat convection between the top surface of fins and the liquid metal could reduce the total thermal resistance (Rt). The above process was effective for microchannels with low channel aspect ratio, low mean velocity (Um) or long heat sink length. The maximum thermal resistance reduction in the example of this paper reached 36.0%. The expanded space endowed the heat sink with lower pressure, which might further reduce the pumping power (P). This rule was feasible both when fins were truncated (h_(2) < 0, h_(2) is the height of expanded channel for E-MCHS) and when over plate was raised (h_(2) > 0).

关键词： liquid metal cooling heat sink expanded microchannel flow and thermal modeling

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