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International Conference on Modern Electrical and Energy systems (MEES)

作者： Simona Kirešová Milan Guzan Branislav Sobota Viacheslav Melnykov Rostyslav Yatsiuk Bohdan Peryvertailo Dept. of Theoretical and Industrial Electrical Engineering Technical University of Košice Košice Slovakia Dept. of Computers and Informatics Technical University of Košice Košice Slovakia Dept. of Systems of Automatic Control and Electric Drive Kremenchuk Mykhailo Ostrohradskyi National University Kremenchuk Ukraine Dept. of Computer Engineering and Electronics Kremenchuk Mykhailo Ostrohradskyi National University Kremenchuk Ukraine

This paper deals with the design of an Android mobile application and visualization of the measured values of particulate matter and meteorological factors from the measurement stations. The application can in principle be effectively used in any field of data visualization. The architecture of the mobile application, the security, the use of AWS services to access the data in the InfluxDB databases, as well as the user interface and graphical visualizations of the measured data are described and illustrated. The application is user tested and the paper documents their first experiences using the mobile application.

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Research of Electromagnetic and Electromechanical Processes in High-Voltage Soft Start Devices with Gate Turn-Off Thyristors

Research of Electromagnetic and Electromechanical Processes ...

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International Conference on Modern Electrical and Energy systems (MEES)

作者： Victor Busher Oleksii Chornyi Valerii Tytiuk Oksana Glazeva Anatoliy Shestaka Lubov Melnikova Dept. of Electrical Engineering and Electronics National University “Odessa Maritime Academy” Odessa Ukraine Institute of Electromechanics Energy Saving and Automatic Control Systems Kremenchuk Mykhailo Ostrohradskyi National University Kremenchuk Ukraine Kryvyi Rih National University Kryvyi Rih Ukraine Dept. Electromechanical Engineering Odessa State Polytechnic University Odessa Ukraine

The purpose of the work is to investigate the possibilities of soft-start devices with gate turn-off thyristors in electric drives of bow thrusters with adjustable propeller pitch to increase reliability, reduce mechanical shocks and currents, and improve electromagnetic compatibility with the ship’s electrical power plant. The characteristic features of these drives are operation on fan load and the need for a smooth start in a sufficiently short time to reduce impact torque in the mechanism. As a result of the analysis, a solution with a shunt capacitor is proposed, which provides high accuracy of regulation of the 1st harmonic of the voltage on the motor according to the given law. The minimum value of the capacitor capacity was found, which for the ABB/AMD710L8T motor with a capacity of 2.7 MW is 150-250 μF at switching frequencies from 500 to 1000 Hz. For the first time, the dependences of the GTO switching frequency on the capacitor capacity and the coefficient of harmonic distortion of the current in the stator phase of the selected motor were found. Frequencies are obtained that correspond to the actual physical characteristics of the GTO (500–1000 Hz). At such switching frequencies, the characteristics of the soft start device practically do not differ from the ideal regulator of the phase voltage of an asynchronous motor. This makes it possible to synthesize closed systems with stabilization of the main coordinates of soft starter electric drive, two-circuit systems with the formation of a given tachogram with torque limitation. All this makes it feasible to implement soft start devices based on gate turn-off thyristors.

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Numerical approach to design of low frequency magnetic field irradiation system for lab on chip experiments

Numerical approach to design of low frequency magnetic field...

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ELEKTRO

作者： Roman Radil Marek Bajtoš Lucia Č arnecká Klaudia Hargaš ová Patrik Kamencay Department of Electromagnetic and Biomedical Engineering University of Zilina Zilina Slovakia Department of Systems Biology and Engineering Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Dept. of Electromagnetic and Biomedical Engineering Organization University of Zilina Zilina Slovakia

ISBN: (数字)9781665467261

ISBN: (纸本)9781665467278

The article is focused on design of specific electromagnetic coil system using numerical modelling and simulation methods. The proposed solution would be capable of delivering magnetic field of desired strength/ flux density and homogeneity within the specific area to affect the cultivation process of single cells in lab on chip experiments.

关键词： Radiation effects Numerical models Magnetic fields Electromagnetics

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Method of Space Vector Pulse Width Modulation in High Voltage Cascaded Frequency Converter with Damaged H-cells 20

Method of Space Vector Pulse Width Modulation in High Voltag...

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20th IEEE International Conference on Modern Electrical and Energy systems, MEES 2021

作者： Busher, Victor Shestaka, Anatoliy Chornyi, Oleksii Glazeva, Oksana Melnikova, Lubov Tytiuk, Valerii National University 'Odessa Maritime Academy' Dept. of Electrical Engineering and Electronics Odessa Ukraine Energy Saving and Automatic Control Systems Kremenchuk Mykhailo Ostrohradskyi National University Institute of Electromechanics Kremenchuk Ukraine Odessa State Polytechnic University Dept. Electromechanical Engineering Odessa Ukraine Kryvyi Rih National University Kryvyi Rih Ukraine

ISBN: (纸本)9781665423663

The paper proposes a control method for a high-voltage cascade frequency converter with H-bridges, based on Space Vector Pulse Width Modulation, regardless of the number of normal and damaged H-cells in phases. Analytical dependencies are given that explain the principle of balancing asymmetric base vectors, and tabular data are provided for the implementation of this method in most possible emergency modes in 4-6-level frequency converters. It was found that the formation of control laws for power switches only taking into account the change in length and phase shifts between the base vectors in emergency modes is not enough to exclude shock electromagnetic and electromechanical processes in an induction motor. Such shocks occur due to the appearance of an additional shift of the phase-to-phase voltages due to the asymmetry of the phase voltages on the half-period of the generated signal. Based on the expansion in a Fourier series, the necessary correcting phase shifts are calculated for all considered emergency modes. Modelling of electromagnetic and electromechanical processes in an electric drive 3.3 MW, 6.6 kV with a 6-level frequency converter has shown the effectiveness of the developed method - during transitions from a normal to an emergency mode, electromagnetic processes caused by phase shifts are excluded. At the same time, SVPWM in all modes increases the energy efficiency of power supplies by 15.6%, which makes it possible to increase the phase-to-phase voltage by 10... 26% in emergency modes in comparison with sinusoidal PWM. The proposed analytical dependencies and tabular data can be used in the synthesis of control systems with both scalar and vector control. © 2021 IEEE.

关键词： Frequency converters

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Real-time gesture control UAV with a low resource framework

Real-time gesture control UAV with a low resource framework

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2021 International Symposium of Asian control Association on Intelligent Robotics and Industrial Automation, IRIA 2021

作者： Bhat, Manohar Mahto, Gopikishan Kesaria, Smit Femandes, Vikrant Arya, Kavi BMS College of Engineering Dept. of Electrical and Electronics Bangalore560019 India UPU Government Polytechnic Dept. of Computer Science and Engg. Durg491001 India Indian Institute of Technology Dept. of Systems and Control Mumbai400076 India Indian Institute of Technology Dept. of Computer Science and Engg. Mumbai400076 India

ISBN: (纸本)9781665433235

This study showcases a low-resource framework that enables people with no technical know-how to interact with drones, it also explores the capabilities of 2D- computer vision and deep learning techniques for gesture based interface systems on a low-cost micro drone with an onboard RGB camera. This Human-Robot Interaction system processes the real-time human pose to allow a user to command the drone, i.e., by providing direction to move and execute actions. A linear PD controller and image processing techniques are implemented to track humans whilst maintaining a safe distance from the user by perceiving dept. information through pose estimation. We incorporated the gesture recognition results into a drone using the Robot Operating System (ROS) and evaluated system performance indoor and outdoor. This low computation framework can be applied further to control robotic arms or mobile robots. © 2021 IEEE.

关键词： Drones

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Forecasting of Monkeypox Cases Using Optimized SARIMAX Based Model

Forecasting of Monkeypox Cases Using Optimized SARIMAX Based...

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Electronic engineering (ICEEM), International Conference on

作者： Mahmoud Elshabrawy Marwa M. Eid Abdelaziz A. Abdelhamid El-Sayed M. El-Kenawy Abdelhameed Ibrahim Dept. of Communications & Electronics Delta Higher Institute of Engineering and Technology Mansoura Egypt Faculty of Artificial Intelligence Delta University for Science and Technology Mansoura Egypt Dep. of Computer Science Faculty of Computer and Information Sciences Ain Shams University Cairo Egypt Computer Engineering and Control Systems Dept. Faculty of Engineering University Mansoura Egypt

This study presents a dipper-throated-based ant colony optimization (DTACO) with the Seasonal Auto-Regressive Integrated Moving Average with eXogenous factor (SARIMAX) model (DTACO+SARIMAX) to forecast monkeypox cases. The work optimizes the SARIMAX model using grid search cross-validation and fine-tunes its hyperparameters using DTACO to improve prediction accuracy. The suggested model's consistency and accuracy are considerable compared to previous studies. Comparisons with state-of-the-art models validate the proposed model's predictions. DTACO+SARIMAX can be used to control disease and monitor monkeypox. Healthcare organizations and governments can better manage and track the pandemic's course by offering accurate predictions, reducing public panic, and enabling effective pandemic planning. The Analysis of Variance (ANOVA) and Wilcoxon signed-rank tests are conducted on the proposed DTACO-SARIMAX model and compared models.

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Fail-Safe Decision Architecture for Positioning Failures on Automated Vehicles

Fail-Safe Decision Architecture for Positioning Failures on ...

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Smart World Congress (SWC), IEEE

作者： Mario Rodríguez-Arozamena Iñigo Aranguren-Mendieta Joshué Pérez Asier Zubizarreta TECNALIA Basque Research and Technology Alliance University of the Basque Country (UPV/EHU) Derio/Bilbao Spain Industry and Mobility Unit TECNALIA Basque Research and Technology Alliance Derio Spain Dept. of Automatic Control and Systems Engineering University of the Basque Country (UPV/EHU) Bilbao Spain

Precise localization is essential for the operation of Connected and Automated Vehicles (CAVs) in urban scenarios. Camera and LiDAR-based solutions are currently used in some of the CAVs around the world, but they entail an expensive performance in terms of computational time and economic cost. Due to this, Global Navigation Satellite System (GNSS) based solutions remains the preferred solution for positioning Automated Vehicles in different Operational Design Domains (ODDs). Although several improvements in system reliability have been made recently, in case of positioning failures most of the architectures rely on system redundancy or automation disengagements to achieve minimal risk conditions. This paper presents a fail-safe decision architecture for mitigating positioning failures of automated vehicles in urban scenarios. The proposed architecture utilizes a combination of sensor fusion localization and decision-making modules to ensure the safe and efficient operation of the vehicle in the event of a positioning failure. The proposed approach is evaluated through simulation in a representative urban scenario and is shown to effectively handle positioning failures, improving the localization accuracy provided by each information source.

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Parallel Interleaved Current Source Rectifiers for High-Power Hydrogen Electrolyzers and Optimal DC Inductance Design

Parallel Interleaved Current Source Rectifiers for High-Powe...

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Annual Conference of Industrial electronics Society

作者： Alvaro Iribarren Ernesto L. Barrios Julián Balda Marco Rivera Patrick Wheeler Alfredo Ursúa Pablo Sanchis Dept. of Electrical Institute of Smart Cities (ISC) Electronic and Communications Engineering Public University of Navarre Pamplona Spain Department of Solar PV Systems – Solar PV BESS & Green H2 Ingeteam Power Technology S.A. – Energy Spain Dept. of Electrical and Electronic Engineering University of Nottingham Power Electronics Machines and Control (PEMC) Research Institute Nottingham UK

ISBN: (数字)9781665464543

ISBN: (纸本)9781665464550

Due to their single-stage step-down nature, current source rectifiers (CSR) constitute attractive options for supplying high-power electrolyzers. To increase system power rating, parallel configurations can be adopted with interleaved Pulse Width Modulation (PWM) techniques that improve power quality and reduce the size of filtering elements. Optimal design of the output dc inductance is crucial to achieve cost-effective and competitive solutions. However, common design methods for one single CSR do not achieve optimal designs. There are hardly any specific design methods for interleaved CSRs either. This paper analyzes the operation of parallel interleaved CSRs supplying high-power electrolyzers and develops a methodology to optimally size the output dc inductances. In addition, a common mode equivalent circuit is developed to analyze the circulating currents caused by the interleaved operation and calculate the ripple in the inductances. When applied to a 3 MW electrolyzer, the results show that inductance size reductions of up to 69% can be obtained with the proposed methodology.

关键词： Industrial electronics Inductance Filtering Design methodology Power quality Hydrogen Rectifiers Pulse width modulation Impedance Equivalent circuits

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Convex neural network synthesis for robustness in the 1-norm

arXiv

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arXiv 2024年

作者： Drummond, Ross Guiver, Chris Turner, Matthew C. Dept. of Automatic Control and Systems Engineering University of Sheffield SheffieldS1 3JD United Kingdom School of Computing Engineering & the Built Environment Edinburgh Napier University EdinburghEH10 5DT United Kingdom School of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom

With neural networks being used to control safety-critical systems, they increasingly have to be both accurate (in the sense of matching inputs to outputs) and robust. However, these two properties are often at odds with each other and a trade-off has to be navigated. To address this issue, this paper proposes a method to generate an approximation of a neural network which is certifiably more robust. Crucially, the method is fully convex and posed as a semi-definite programme. An application to robustifying model predictive control is used to demonstrate the results. The aim of this work is to introduce a method to navigate the neural network robustness/accuracy trade-off. © 2024, CC BY.

关键词： Model predictive control

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A Method of Evaluating FACTS Device Impact on Voltage Flicker in the EAF Supply System 12

A Method of Evaluating FACTS Device Impact on Voltage Flicke...

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12th International Conference and Exhibition on Electrical Power Quality and Utilisation, EPQU 2020

作者： Varetsky, Yuriy Konoval, Volodymyr Hanzelka, Zbigniew Lviv Polytechnic National University Dept. of Power Engineering and Control Systems Lviv Ukraine Agh University of Science and Technology Dept. of Power Electronics and Energy Control Systems Krakow Poland

ISBN: (纸本)9781728174617

FACTS devices are widely used in world practice to compensate for voltage fluctuations caused by the operation of an electric arc furnace (EAF) in a power system. The spectrum of voltage fluctuations depends on the design and operating conditions of the EAF, as well as the characteristics of the power supply system. At the design stage, of considerable interest are methods for assessing the predicted decrease in voltage fluctuations when using the selected compensator for the particular EAF. This article presents the principles of modeling the impact of a FACTS device with a known compensation delay on the level of voltage fluctuations in the EAF power supply system. The index ΔU10 is used as the equivalent level of voltage fluctuations in the compared applications. This method made it possible to use relatively simple models of EAF, FACTS and power supply system to the adequate comparative evaluating the effect of compensation devices on voltage fluctuations in the EAF power system. © 2020 IEEE.

关键词： Flexible AC transmission systems

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