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Advanced Technology (KhPIWeek), IEEE KhPI Week on

作者： Lidiya Parashchuk Yurii Shelekh Myroslav Sabat Lubomyra Odosii Deartment of electromechnical and electronics Hetman Petro Sahaidachnyi National Army Academy Lviv Ukraine Department of Electric Power Engineering and Control Systems Lviv Polytechnic National University Lviv Ukraine

The current trend in the development of non-destructive testing of materials in the building industry is mainly concerned with the detection of flaws and defects in concrete elements and structures, and acoustic methods are prospects in this field. An important indicator of the quality of concrete is strength. However, non-destructive testing methods do not allow direct linking of the electrical characteristics with the strength. In this paper, in the form of a graphical dependence using an electromechanical installation based on experimental studies, the relationship between strength and acoustic impedance is shown.

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Resilience enhancement for coastal power systems via typhoon response plans

Resilience enhancement for coastal power systems via typhoon...

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IET powering Net Zero (PNZ 2024)

作者： Bangyan Wang Xiuli Wang Shixiong Qi Wenduo Sun Qihang Huang Shengyuan Liu Xiang Ma Xiao-Ping Zhang Yaohong Xie School of Electrical Engineering Xi'an Jiaotong University Xi'an People's Republic of China National Electric Power Dispatching and Control Center State Grid Corporation of China Beijing People's Republic of China State Grid Zhejiang Electric Power Dispatching and Control Center Hangzhou People's Republic of China Jinhua Power Supply Company State Grid Zhejiang Electric Power Company Jinhua People's Republic of China Department of Electronic Electrical and Systems Engineering University of Birmingham Birmingham UK

ISBN: (数字)9781837242627

Formulating typhoon response plans and effectively implementing them can improve the resilience of coastal power systems. This type of plan mainly includes line hardening and unit dispatching. Initially, main typhoon scenarios are determined based on historical data, and the line failure conditions are simulated. Furthermore, a unit commitment and power flow optimization model is established to determine the optimal line hardening and unit dispatch instructions. During real-time typhoon events, the intensity and path may deviate from the main scenarios, necessitating flexible execution. Therefore, a similarity mechanism and a multi-stage execution method are established to ensure that the plan’s execution maximizes its benefits. A case study validates the effectiveness of the proposed response plan construction and execution method.

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Attentive online sequential extreme learning machine for nonlinear dynamic process monitoring

Attentive online sequential extreme learning machine for non...

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第34届中国过程控制会议

作者： Jingxin Zhang Yuying Cao Hai Zhou Department of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of EngineeringMinistry of Education Department of Automation Southeast University New Energy Research Center China Electric Power Research Institute

This paper provides a new monitoring method based on the attention mechanism and online sequential extreme learning machines(OS-ELM) for nonlinear dynamic process,referred as attentive ***-ELM provides the prediction of outputs and the update of parameters by sequential *** cope with nonlinearity,the attention mechanism is utilized to map data to a high-dimensional feature *** effect of the attention mechanism and the single hidden layer feedforward network trained with OS-ELM work collaboratively in monitoring the real-time process data to detect possible *** addition,fault detection rate and false alarm rate are adopted to evaluate the monitoring *** effectiveness of the proposed method is illustrated by a typically complicated industrial system.

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A Research of Digital Directional Current Protection Devices Operation Stability in Transient Modes during Single Phase to Earth Faults in 6-10 KV Networks with Isolated Neutral Point 3

A Research of Digital Directional Current Protection Devices...

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3rd International Youth Scientific and Technical Conference Relay Protection and Automation, RPA 2020

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

ISBN: (纸本)9781665404631

Single phase to earth fault is the prevailing type of damage in 6-10 kV medium voltage networks. The most dangerous of single phase to earth faults is intermittent arc earth faults, which are accompanied by significant overvoltage in electrically connected network. In 6-10 kV distribution networks in the function of earth fault protection device during the impossibility of simple and sustainable zero sequence current protection devices, directional zero sequence current protection devices are commonly used. According to the data from operating experience the main disadvantage of some directional zero sequence current protection devices is refusal-to-operate possibility during internal faults and unnecessary operation during external intermittent arc faults. That is why, the research and substantiation of directional zero sequence current protection devices realization principles, which can provide high dynamic stability of protection operation is the relevant objective. The main tendency of development of relay protection equipment, including single phase to earth protection devices is associated with introduction of microprocessor technologies and digital signal processing methods. Thus, in this work the research of functioning of protection devices during transient modes is made for digital-based performance of zero sequence current protection devices. © 2020 IEEE.

关键词： Digital devices

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Techno-Economic Assessment of a Large-Scale Electrolysis Plant in Hydrogen and Ancillary Service Markets

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IFAC-PapersOnLine 2024年第13期58卷 140-145页

作者： Yassine Ennassiri Giulio Ferro Michela Robba Gilney Damm Edemar O. Prado DIBRIS—Department of Informatics Bioengineering Robotics and Systems Engineering University of Genova 16145 Italy IMSE Laboratory Gustave Eiffel University Marne-la-Vallée France Power Electronics and Control Research Group GEPOC Federal University of Santa Maria SantaMaria 97105-900 RS Brazil

Hydrogen electrolysis systems have seen considerable interest from energy communities as a potential solution for shifting from fossil-based energy resources to clean energy alternatives. The system consists of transforming electricity into hydrogen via water electrolysis. As it is expected to have a large-scale connection with the grid to compensate the fluctuation of renewables, it is important to understand the system’s technical and economic feasibility. Therefore, this work aims to provide a high-level techno-economic assessment for the participation of a large-scale electrolysis plant in hydrogen and grid ancillary service markets. The plant generates revenue from two sources: hydrogen and frequency regulation. Based on market prices of electricity and hydrogen, a linear programming (LP) optimization has shown that a 50MW electrolysis plant can generate a 33% increase in profit if the plant includes the grid support market in the business model. Additionally, simulations under unstable grid frequency have shown high reactivity of the system to maintain grid stability.

关键词： optimization hydrogen production frequency regulation linear programming

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A Research of Operation Stability of Overhead Transmission Lines' Relay Protection Algorithms, Which are Based on Travelling Wave Principle 3

A Research of Operation Stability of Overhead Transmission L...

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3rd International Youth Scientific and Technical Conference Relay Protection and Automation, RPA 2020

作者： Kutumov, Yu.D. Ivanovo State Power Engineering University Automatic Control of Electrical Power Systems Department Ivanovo Russia

ISBN: (数字)9781665404631

ISBN: (纸本)9781665404631

The characteristic of the problem, relevance of the paper. At the present time in electric power industry a concept of intelligent electrical power system is realized. A key component of this system is a digital substation. One of the main tasks of digital substation equipment is realization of effective relay protection and network automation devices. Relatively new phenomenon in this field is relay protection devices, which are based on travelling wave parameters measurement. A very important characteristic of relay protection devices (especially for extra-high voltage transmission lines of 330-750 kV) is their speed-of-response. The usage of travelling wave-based principle will allow to limit speed-of-response only by travelling wave propagation time along a protected transmission line. © 2020 IEEE.

关键词： Electric lines

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Scalable Multiport DC-DC Converter for Bidirectional EV charging in DC Traction Grids

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IEEE Transactions on Circuits and systems II: Express Briefs 2025年

作者： Lukianov, Mykola Romero-Cadaval, Enrique Kasprowicz, Andrzej Husev, Oleksandr Strzelecki, Ryszard Department of Power Electronics and Electrical Machines Gdañsk University of Technology Gdañsk80-222 Poland Power Electrical and Electronic Systems R and D Group School of Industrial Engineering University of Extremadura Badajoz06006 Spain Gdynia Maritime University Faculty of Electrical Engineering Gdynia Poland Warsaw University of Technology Institute of Control and Industrial Electronics Koszykowa 75 Warsaw00-662 Poland

The limited availability of public Electric Vehicle (EV) charging infrastructure poses a significant challenge to EV adoption in urban areas, that requires significant economic expenses. One potential solution to mitigate the problem is utilizing the existing traction DC grid infrastructure for EV charger connections. Such solution allows exploiting already existing traction substation equipment for both EV charging and powering DC traction grids, potentially reducing charging station installation costs. At the same time, bidirectional EV charger operation allows providing services such as DC grid voltage stabilization and traction transport braking energy recuperation. Therefore, this paper examines a scalable multiport DC-DC converter, suitable for multiterminal EV charging stations, located in the proximity to DC traction networks. The use of a multiport converter allows for sharing electric components across multiple ports, reducing the total number of elements required, compared to conventional solutions, where each EV charger relies on a separate converter. © 2004-2012 IEEE.

关键词： Charging stations

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Analysis of Some Parameters of Synthesized Anodized Aluminum Oxide Matrices 17

Analysis of Some Parameters of Synthesized Anodized Aluminum...

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17th IEEE International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer engineering, TCSET 2024

作者： Bukliv, Roxoliana Adamiv, Volodymyr Bordun, Ihor Andrushchak, Nazariy Teslyuk, Ihor Andrushchak, Anatoliy Institute of Chemistry and Chemical Technologies Lviv Polytechnic National University Department of Chemistry and Technology of Inorganic Substances Lviv Ukraine O. G. Vlokh Institute of Physical Opics Ivan Franko National University of Lviv Lviv Ukraine Czestochowa University of Technology Department of Electrical Power Engineering Czestochowa Poland Lviv Polytechnic National University Department of Ecology and Sustainable Environmental Management Lviv Ukraine Lviv Politechnic National University Computer-Aided Design Systems Lviv Ukraine Lviv Polytechnic National University Department of Applied Physics and Nanomaterials Science Lviv Ukraine

ISBN: (纸本)9798331520564

Studies have been conducted on anodized aluminum oxide (AAO) nanomatrices manufactured by SmartMembranes (SM) (Germany) and InRedox (USA). An X-ray fluorescence analyzer determined the quantitative and qualitative composition of AAO matrices. It is shown that the AAO matrices have a large transparency window (250 - 2750 nm) and the dependence of the second harmonic generation (SHG) signal on the pore size. The parameters of the porous structure of the samples were estimated by isothermal processes of nitrogen adsorption/desorption at its boiling point (T = 77 K). © 2024 IEEE.

关键词： Harmonic generation

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Simulation of zero sequence current transformers for protection against single-phase ground fault in medium voltage cable networks

Simulation of zero sequence current transformers for protect...

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2020 IEEE power and Energy Student Summit, PESS 2020

作者： Evdakov, Aleksey Filatova, Galina Shuin, Vladimir Department of Electric Power Systems Automatic Control Ivanovo State Power Engineering University Ivanovo Russia

ISBN: (纸本)9783800753383

In distribution cable networks of medium voltage (in Russia 6–10 kV), the most common type of damage is single-phase ground fault (SPGF). In an unearthing system, a significant part of the SPGF has an intermittent arc character, which is accompanied by intense transients that have a significant impact on the selectivity and stability of operation, both directional and non-directional current protection against this type of damage. The most effective method for studying the dynamic modes of operation of protection devices against these types of SPGF is a simulation. One of the most difficult tasks arising in the development of simulation protection models is the modeling of zero-sequence cable current transformers. The article is devoted to the development of a simulation model of a zero-sequence electromagnetic current transformer in Simulink, which allows simulate both steady-state and transient SPGF modes with sufficient accuracy at various secondary loads, taking into account the influence of magnetic circuit saturation. © VDE VERLAG GMBH - Berlin - Offenbach.

关键词： Cables

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Development and Marketing Promotion of the Educational Program Mobile Application in the Field of Electrical engineering 4

Development and Marketing Promotion of the Educational Progr...

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4th IEEE International Conference on Modern Electrical and Energy System, MEES 2022

作者： Pavlenko, Volodymyr Ponomarenko, Ihor Fedorchenko, Andrii Onofriichuk, Volodymyr Chorna, Olha Pylypenko, Vladyslav Kyiv National University of Technologies and Design Faculty of Mechatronics and Computer Technologies Kyiv Ukraine Kyiv National University of Technologies and Design Department of Marketing and Communication Design Kyiv Ukraine Kyiv National Economics University Named after Vadym Hetman Department of Marketing Named after A.F. Pavlenko Kyiv Ukraine Khmelnitsky National University Department of Machines and Apparatuses Electromechanical and Power Systems Khmelnitsky Ukraine Kremenchuk Mykhailo Ostrohradskyi National University Department of Computer Engineering and Electronics Kremenchuk Ukraine Kyiv National University of Technologies and Design Department of Information and Computer Technologies Kyiv Ukraine

ISBN: (纸本)9798350346831

The peculiarities of users' reorientation in the conditions of digitalization to the active use of various resources on the Internet are revealed. Prerequisites for the spread of various gadgets (smartphones, tablets, laptops) have been determined, which contributes to the intensive growth of specialized applications that make it possible to satisfy the needs of consumers certain groups in digital products. It has been proven that the presence of competition between companies implies the creation of innovative products on a permanent basis in accordance with market demands. A comprehensive analysis of paying users was conducted and it was determined that a significant share is made up of representatives of generation Z, who actively use advanced digital products and quickly reorient from one mobile application to another. The expediency of developing and implementing an effective marketing strategy for promoting the appropriate mobile application on the market and forming close communications with consumers on a long-term basis, which involves the use of appropriate digital tools, is substantiated. The feasibility of developing and bringing new educational software to the market has been proven, since in 2022 there will be more than 520,000 mobile applications in the field of education, which indicates a significant demand among users of these products. The expediency of the introduction of mobile applications by higher education institutions for individual educational programs, which will contain thematic educational content and feedback forms with students and other interested persons, is substantiated. The effectiveness of using appropriate educational applications for establishing communications with the target audience in the digital environment, popularizing a specific educational program on the market and improving it in accordance with the wishes of all interested parties has been proven. Survey forms integrated into the application allow to adapt the list o

关键词： Marketing

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