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3rd International Conference on Advanced Electrical engineering, ICAEE 2024

作者： Bechekir, Seyf Eddine Belabed, Meriem Brahami, Mostefa Jbilou, Mokhtaria Nemmich, Said Marref, Mohemed Amine Djillali Liabes University of Sidi Bel-Abbes Intelligent Control and Electrical Power Systems Laboratory Department of Electrical Engineering Algeria Algeria Djillali Liabes University of Sidi Bel-Abbes Intelligent Control and Electrical Power Systems Laboratory Algeria Institute of Applied Sciences and Technologies University of Sciences and Technology of Oran Mb Algeria

ISBN: (纸本)9798350349351

This paper presents the implementation of a half-bridge resonant inverter to power a dielectric barrier discharge (DBD) ozone generator. We use the PIC16F876A microcontroller-based control circuit to vary the inverter frequency. We use a step-up transformer to obtain the high voltage required for the DBD. We conducted an experimental study to investigate the impact of frequency and voltage on ozone production and power consumption. The results show that these two parameters have a strong influence. This study demonstrates the advantages of using a resonant inverter combined with optimum electrical parameter adjustment to achieve excellent energy efficiency for the DBD ozone generator. The choice of a resonant half-bridge topology aims to maximize energy efficiency, crucial in a solar-powered system. The circuit has been optimized to reduce switching losses. In addition, the development of the power source takes into account the capacitive nature of DBD reactors, using a series resonant circuit formed by the DBD capacitance and the step-up transformer inductance. The frequency range from 14 kHz to 17.5 kHz has been specifically chosen and optimized for the DBD reactor, taking into account the constraints of the PV source and the characteristics of the discharge. © 2024 IEEE.

关键词： Resonant circuits

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Compensation of the Temperature Impact on the Characteristics of a Titania-Silica Thin Film Humidity Sensor Element

Compensation of the Temperature Impact on the Characteristic...

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2023 International Conference Automatics and Informatics, ICAI 2023

作者： Ivanov, Stefan Nedev, Nedyu Nenova, Zvezditza Technical University of Gabrovo Department of Automation Information and Control Systems Gabrovo Bulgaria Technical University of Gabrovo Department of Fundamentals of Electrical and Power Engineering Gabrovo Bulgaria

ISBN: (纸本)9798350312911

In the present work is investigated the impact of ambient temperature in the range of 20°C to 50°C under a change in relative humidity RH of 20% up to 92 % on the characteristics of a highly sensitive TiO2-SiO2-based thin-film impedance humidity sensor element doped with Ce and prepared by a sol-gel method. The variation of sensor impedance changes in a very wide range - about 4 orders of magnitude. The sensor element is connected in a measurement circuit based on an AC bridge, a variable gain amplifier, a precision rectifier, and a microcontroller with a built-in analog-to-digital converter. The use of artificial neural networks monitoring the ambient temperature and measured voltage is proposed for the realization of the temperature compensation of the characteristics. The proposed approach allows compensating the impact of temperature and performing measurements when connecting humidity sensing elements with a very wide range of impedance change. © 2023 IEEE.

关键词： Silica

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Optimization of Cylindrical Blades for Wind Turbine Based on Magnus Effect

Optimization of Cylindrical Blades for Wind Turbine Based on...

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2023 International Conference on Electromechanical and Energy systems, SIELMEN 2023

作者： Lukin, Aleksandr Demidova, Galina Lukichev, Dmitry Poliakov, Nikolai Anuchin, Alecksey ITMO University Faculty of Control Systems and Robotics Saint-Petersburg Russia Moscow Power Engineering Institute Electric Drives Department Moscow Russia

ISBN: (纸本)9798350315240

Wind turbines based on the Magnus effect open new prospects in terms of energy generation for areas with low average wind speeds. The main feature of these turbines is rotating cylinders which are used to create lift instead of blades. Due to this unconventional design, different parameters of the cylinder, such as mass and moment of inertia, can greatly affect the dynamic characteristics of such energy systems. The goal of this paper was to present an approach to structural optimization of a cylinder flange of the experimental Magnus effect-based wind turbine. The proposed approach, presented as an algorithm, allows us to determine input data for the preferred structural optimization software and achieve lightweight, low-inertia parts. control simulation has shown that optimized parts ensure a high enough factor of safety while also significantly reducing the moment of inertia. © 2023 IEEE.

关键词： Finite element method

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control and Stability of Large-scale power System with Highly Distributed Renewable Energy Generation:Viewpoints from Six Aspects

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CSEE Journal of power and Energy systems 2023年第1期9卷 8-14页

作者： Qing-Hua Wu Anjan Bose Chanan Singh Joe H.Chow Gang Mu Yuanzhang Sun Zhaoxi Liu Zhigang Li Yang Liu School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China School of Electrical Engineering&Computer Science Washington State UniversityPullmanWA 99164USA Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTX 77843USA Department of Electrical Computer and Systems EngineeringRensselaer Polytechnic Institute(RPI)TroyNYUSA Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin 132012China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China

power systems are moving toward a low-carbon or carbon-neutral future where high penetration of renewables is *** conventional fossil-fueled synchronous generators in the transmission network being replaced by renewable energy generation which is highly distributed across the entire grid,new challenges are emerging to the control and stability of large-scale power *** analysis and control methods are needed for power systems to cope with the ongoing *** the CSEE JPES forum,six leading experts were invited to deliver keynote speeches,and the participating researchers and professionals had extensive exchanges and discussions on the control and stability of power ***,potential changes and challenges of power systems with high penetration of renewable energy generation were introduced and explained,and advanced control methods were proposed and analyzed for the transient stability enhancement of power grids.

关键词： Distributed energy resources high converter penetration power system control renewable energy generation stability control transient stability

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Analytic Mechanism for the Cumulative Effect of Wind power Fluctuations from Single Wind Farm to Wind Farm Cluster

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CSEE Journal of power and Energy systems 2022年第5期8卷 1290-1301页

作者： Gang Mu Fangze Wu Xiaoping Zhang Ziheng Fu Bai Xiao Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin 132012China Department of Electronic Electrical and Systems EngineeringSchool of EngineeringUniversity of BirminghamBirmingham B152TTU.K

The use of wind power is rapidly growing worldwide as a means of reducing carbon emissions for the energy *** has the world’s largest wind power installation and multiple large-scale wind farm clusters,each comprising dozens of wind *** the planning and operation of the power system,it is important to understand the power fluctuation characteristics of wind farm *** studies demonstrate that the relative power fluctuation of a wind farm cluster is less than that of a single wind *** this decreasing trend a random occurrence or does it have a regular pattern?This scientific question is addressed by investigating the mechanism of the cumulative effect of a wind farm *** this study,a cumulative model is proposed by examining the spatiotemporal relationships of wind power variations and wind farm *** gain function and critical cumulative frequency are defined as the foundations to analytically describing the cumulative *** investigating the cumulative effect mechanism,the relationship between power fluctuation and spatiotemporal parameters of the wind farm cluster are *** power fluctuation of a cluster can be predicted using the cumulative model even before it is completely *** mechanism of the cumulative effect is validated on the basis of the data of two actual wind farm clusters.

关键词： Analytic mechanism cumulative effect evolution regularity wind farm cluster wind power fluctuation

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Catalytic urea hydrolysis by composite metal oxide catalyst towards efficient urea-based SCR process:performance evaluation and mechanism investigation

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Frontiers of Environmental Science & engineering 2023年第5期17卷 67-80页

作者： Yuchen Li Zhen Chen Xiangyu Zhang Kun Yang Lidong Wang Junhua Li MOE Key Laboratory of Resources and Environmental Systems Optimization Department of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Xi’an Thermal Power Research Institute Co. Xi’an 710032China

As a promising option to provide gaseous NH_(3) for SCR system,catalytic urea hydrolysis has aroused great attention,and improving surface area and activity of catalysis are the crucial issues to be solved for efficient urea ***,a composite metal oxide(TiO_(2)@Al_(2)O_(3))catalyst was prepared by a simple hydrothermal method,with mesoporous alumina(γ-Al_(2)O_(3))as *** results verify the mesoporous structure and submicron cluster of TiO_(2)@Al_(2)O_(3),with exposed crystal faces of(101)and(400)for TiO_(2)andγ-Al_(2)O_(3),*** electronegativity difference of Ti4+and Al3+changes the charge distribution scheme around the interface,which provides abundant acid/base sites to boost the urea ***,for an optimal proportioning with nano TiO_(2)content at 10 wt.%,the hydrolysis efficiency can reach up to 35.2%at 100℃ in 2 h,increasing by~7.1%than that of the blank experiment.^(13)C NMR spectrum measurements provide the impossible intermediate species during urea *** calculations are performed to clarify the efficient H_(2)O decomposition at the interface of TiO_(2)@Al_(2)O_(3).The result offers a favorable technology for energy-efficiency urea hydrolysis.

关键词： SCR Urea hydrolysis Catalytic Water dissociation Electronegativity

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Operation Analysis and Performance Evaluation of a Modular Step-Down DC-DC Converter 7

Operation Analysis and Performance Evaluation of a Modular S...

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7th IEEE International Conference on Smart Technologies in power engineering and Electronics, STEE 2024

作者： Stepenko, Serhii Stala, Robert Waradzyn, Zbigniew Yatchenko, Yevhenii Prystupa, Anatoliy Chernihiv Polytechnic National University Electrical Engineering Information and Measurement Technologies Chernihiv Ukraine Agh University of Krakow Department of Power Electronics and Energy Control Systems Kraków Poland

ISBN: (纸本)9798331540999

The paper presents a comprehensive analysis of the design parameters, operational characteristics and performance evaluation of a modular step-down DC-DC converter. The converter is engineered for applications demanding high-output current, featuring an input voltage of 48 V and an output voltage of 1 V. When operating in the single-stage voltage regulator module (VRM), its modular architecture is optimized to minimize resistive losses. Noteworthy is the integration of an input capacitor divider to alleviate voltage stress of components. Additionally, special attention is given to the impact of parasitic parameters on the converter's performance. Through a meticulous examination of system topology, validated by observed current and voltage waveforms, and analytical comparison to classic interleave converters, this study elucidates the operational intricacies of the converter. The findings, anchored in the context of a MOSFET-based four-module converter rated for a maximum power output of 350 W at 1 V, provide valuable insights for the design and optimization of similar power conversion systems. © 2024 IEEE.

关键词： DC-DC converters

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Creating and Studying a Methodology for Calculating a Resistive Voltage Divider for Use in Electronic Voltage Transformers

Creating and Studying a Methodology for Calculating a Resist...

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International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)

作者： A.A. Yablokov A.V. Panashchatenko E.E. Gotovkina R.A. Maltsev Electric power systems automatic control department Electric systems department Ivanovo State Power Engineering University Ivanovo Russia

ISBN: (数字)9798331501105

ISBN: (纸本)9798331501112

In 2017 the Russian government approved a programme, Russian Federation Digital Economy, the main goal of which is to create an ecosystem with large scale use of digital format data in all fields of social and economic activity [1]. The electric power industry is being transformed in accordance with the concept, Digital Transformation 2030, developed by Russian power Grids PLC [2]. Pursuant to this concept, electric substations under construction should be digital. At present, Russia has a number of operating digital substations (DSS) (Medvedevskaya SS, UVAT SS, Desna SS, Tobol SS [3]–[5], while many DSSs are at the design or construction stage. The creation of new substations, and also reconstruction of already operating ones, requires solving the problems of operating conventional electromagnetic current and voltage transformers. Electromagnetic voltage transformers (VT) are energy-inefficient, explosion – and flammability- hazardous equipment (due to their requiring additional charging with low consumption by micro-processing devices), with large weight and dimensions (an NKF-100 type transformer weighing 840 kg).

关键词： Resistors Resistance Substations Voltage measurement Voltage transformers Biological system modeling Spread spectrum communication Transformers Integrated circuit modeling Electromagnetics

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A Multi-stage Design Approach for Optimizing a PMSG-based Grid-connected Ocean Wave Energy Conversion System

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Protection and control of Modern power systems 2024年第6期9卷 122-142页

作者： Muhammad Noman Guojie Li Muhammad Waseem Khan Keyou Wang Bei Han the Key Laboratory of Control of Power Transmission and Conversion Ministry of Education(MOE)the Department of Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200030China the Interdisciplinary Re-search Center for Sustainable Energy Systems(IRC-SES) King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia

Fully harnessing the ocean wave’s renewable energy resources could benefit coastal ***,ocean wave energy harvesting systems encounter several challenges,i.e.,marine uncertainties,long-distance mainte-nance,power fluctuations,irregular wave currents,non-linear generator dynamics,turbine limitations,cost optimization,and power smoothing *** overcome these challenges,this paper proposes a new multi-stage con-trol design approach for performance evaluation of the os-cillating water column(OWC)-based ocean wave energy conversion(OWEC)*** first stage optimizes the Wells turbine by implementing an efficient airflow control *** achieves maximum power-harvesting ability by eliminating stalling *** the second stage,we investigate the robustness of the permanent magnet syn-chronous generator-based OWEC system by designing adaptive back-stepping controllers,taking into account the Lyapunov stability *** accomplishes precise speed regulation for optimal power extraction while delivering reduced delay response and percentage *** ensure the OWEC system’s availability,the third stage incorporates fault-ride-through *** executes a fault reconfig-urable control for a parallel converter configuration,elimi-nating only the faulty leg instead of the entire power *** the fourth stage,a supercapacitors-based energy management system achieves power smoothing,even when the OWC plant output power *** accomplish this by implementing a model predictive control ***,the Matlab/Simulink results verify that the presented mul-ti-stage control for the OWC OWEC system is an effective design approach,offering an optimal,robust,reliable,and power-smoothing solution.

关键词： Ocean wave energy oscillating water column Wells turbine adaptive control fault-tolerant control energy management system.

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Ontological Decision Support Model for Cargo Port Risk Management 7

Ontological Decision Support Model for Cargo Port Risk Manag...

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7th International Conference on Information, control, and Communication Technologies, ICCT 2023

作者： Bondareva, Irina Protalinskiy, Oleg Khanova, Anna Nesterova, Evgeniya Belova, Anastasiya Astrakhan State Technical University Department of Applied Informatics Astrakhan Russia Moscow Power Engineering Institute Department of Automated Control Systems of Thermal Processes Moscow Russia

ISBN: (纸本)9798350340945

Modern unstable conditions of the market environment dictate the need for transport logistics enterprises to predict possible risk situations in order to prevent them, as well as to develop tools that allow forming management decisions, evaluating the effectiveness of each of them and choosing the most appropriate one, taking into account specific tasks and various influencing factors. As risks, situations of failure to achieve the goals of the cargo port, as well as failure to achieve standard values by the indicators for assessing these goals are considered. Goals and indicators are indicated in the constructed balanced scorecard (BSC). A set of links between goals and indicators for their assessment with risks at various levels of management is presented in the form of a developed multi-level hybrid logical-probabilistic (LP) risk model of the cargo port, as well as in detailed scenario models of this LP model. The ontological model contains all the information about the interaction of elements that affect the onset of risky events, and allows you to select options for exiting a risky situation in accordance with various specified conditions. The simulation model allows, based on the results of requests to the ontological model and the scenarios of simulation experiments developed on their basis, to develop a management decision that allows avoiding risky situations in the longer term, taking into account all available stochastic characteristics and factors of influence. © 2023 IEEE.

关键词： Risk management

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