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Development and Testing of a Methodology for Studying Digital Instrument Transformers under Conditions of Arc Intermittent Single-Phase Ground Faults

Development and Testing of a Methodology for Studying Digita...

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International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

作者： Sergey Litvinov Galina Filatova Natalya Kuzmina Power Stations Substations and Department Ivanovo State Power Engineering University Ivanovo Russia Electric Power Systems Automatic Control Department Ivanovo State Power Engineering University Ivanovo Russia

In Ivanovo State power engineering University (ISPEU, Ivanovo, Russia) digital instrument current and voltage transformers (DCVTs) has developed. Numerous studies and tests of DCVTs have been carried out; these devices already have operating experience in existing electrical facilities. However, some areas of application of DCVTs require additional research. The article presents a methodology for experimental study of 6(10) kV DCVTs under conditions of arc intermittent single-phase ground faults, a diagram of a test installation, as well as the results of testing the methodology. The article presents the quantitative characteristics of the modes obtained in laboratory conditions. The modes of arc intermittent single-phase ground faults and ferroresonance were simulated using electromagnetic measuring voltage transformers in the installation. However, during the experiments, some shortcomings in the methodology of the experiment were revealed. The article also indicates measures to improve the methodology for conducting further experimental studies of DCVTs.

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A comparative study on the degradation of iohexol and diatrizoate during UV/persulfate process: kinetics, degradation pathways and iodinated disinfection by-products†

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Environmental Science: Water Research and Technology 2024年第3期10卷 718-728页

作者： Hu, Chen-Yan Xu, Ling Lin, Yi-Li Li, Cong College of Environmental and Chemical Engineering Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems Shanghai University of Electric Power Shanghai200090 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology No. 1 University Rd. Yanchao Dist. Kaohsiung824 Taiwan School of Environment and Architecture University of Shanghai for Science and Technology Shanghai200093 China

Iodinated X-ray contrast media (ICM) are widely used in medical imaging due to their stable properties, but they cannot be effectively removed in wastewater treatment plants (especially hospital wastewater). Therefore, ICM have been widely detected in aquatic environments and may gradually accumulate and cause adverse effects to the creatures. In this paper, the degradation characteristics of two most commonly detected ICM, iohexol and diatrizoate, by ultraviolet/persulfate (UV/PS) were investigated. UV/PS can effectively degrade both ICM, with pseudo-first-order rate constants (kobs) of 0.3641 min−1 for iohexol and 0.3511 min−1 for diatrizoate, and SO4·− played a major role in UV/PS degradation of both ICM. The presence of I−, Cl−, Br−, humic acid (HA), and alkaline conditions inhibited the degradation efficiency of both ICM. Less I-DBPs were formed from iohexol at low PS and high Br− concentrations, but from diatrizoate at high PS and Br− concentrations. The degradation pathways of iohexol and diatrizoate in the UV/PS process were proposed separately according to the detected degradation intermediates. This study can provide an essential theoretical basis for the UV/PS degradation of the two ICM. © 2024 Royal Society of Chemistry. All rights reserved.

关键词： Degradation

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Risk Assessment with Generic Energy Storage under Exogenous and Endogenous Uncertainty

Risk Assessment with Generic Energy Storage under Exogenous ...

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2022 IEEE power and Energy Society General Meeting, PESGM 2022

作者： Qi, Ning Cheng, Lin Wan, Yuxiang Zhuang, Yingrui Liu, Zeyu State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing100084 China Tianjin University China

ISBN: (数字)9781665408233

ISBN: (纸本)9781665408233

Current risk assessment ignores the stochastic nature of energy storage availability itself and thus lead to potential risk during operation. This paper proposes the redefinition of generic energy storage (GES) that is allowed to offer probabilistic reserve. A data-driven unified model with exogenous and endogenous uncertainty (EXU & EDU) description is presented for four typical types of GES. Moreover, risk indices are proposed to assess the impact of overlooking (EXU & EDU) of GES. Comparative results between EXU & EDU are illustrated in distribution system with day-ahead chance-constrained optimization (CCO) and more severe risks are observed for the latter, which indicate that system operator (SO) should adopt novel strategies for EDU uncertainty. © 2022 IEEE.

关键词： Risk assessment

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Classification of Images Based on a System of Hierarchical Features

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Computers, Materials & Continua 2022年第7期72卷 1785-1797页

作者： Yousef Ibrahim Daradkeh Volodymyr Gorokhovatskyi Iryna Tvoroshenko Mujahed Al-Dhaifallah Department of Computer Engineering and Networks College of Engineering at Wadi AddawasirPrince Sattam Bin Abdulaziz UniversityAl-Kharj11991Saudi Arabia Department of Informatics Kharkiv National University of Radio ElectronicsKharkiv61166Ukraine Control and Instrumentation Engineering Department and Interdisciplinary Research Center(IRC)for Renewable Energy and Power SystemsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia

The results of the development of the new fast-speed method of classification images using a structural approach are *** method is based on the system of hierarchical features,based on the bitwise data distribution for the set of descriptors of image *** article also proposes the use of the spatial data processing apparatus,which simplifies and accelerates the classification *** have shown that the time of calculation of the relevance for two descriptions according to their distributions is about 1000 times less than for the traditional voting procedure,for which the sets of descriptors are *** introduction of the system of hierarchical features allows to further reduce the calculation time by 2–3 times while ensuring high efficiency of *** noise immunity of the method to additive noise has been experimentally *** to the results of the research,the marginal degree of the hierarchy of features for reliable classification with the standard deviation of noise less than 30 is the 8-bit *** costs increase proportionally with decreasing bit *** method can be used for application tasks where object identification time is critical.

关键词： Bitwise distribution computer vision descriptor hierarchical representation image classification keypoint noise immunity processing speed

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Supervised reinforcement learning based trajectory tracking control for autonomous vehicles ⁎

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IFAC-PapersOnLine 2024年第10期58卷 140-145页

作者： András Mihály Van Tan Vu Trong Tu Do Péter Gáspár Systems and Control Laboratory Institute for Computer Science and Control (SZTAKI) Hungarian Research Network Kende u. 13-17 H-1111 Budapest Hungary Department of Automotive Mechanical Engineering Faculty of Mechanical Engineering University of Transport and Communications Hanoi Vietnam Mechanical and Power Engineering Faculty Electric Power University Hanoi Vietnam

Recent developments in autonomous vehicle technologies and applications gain a lot of interest by the public, as the popularity of both driver assistance and automated driving systems increase. One of the most promising aspect of the autonomous vehicle compared to conventional human driven vehicle is the increased level of safety. Machine learning techniques enables to achieve fast and efficient control actions compared to model based techniques. However, the advantages of a more conservative model based controller are their better robustness properties. In this paper a synergy of the two control philosophy is presented through a trajectory tracking control design for autonomous vehicles. A supervised reinforcement learning (RL) control method is introduced, where a robust Linear Parameter Varying (LPV) controller supervises the operation of the trained RL agent. Thus, in case sensor noise is detected, the guaranteed stability LPV controller takes over the steering control action. In order to demonstrate the operation of the proposed method, three different simulations have been evaluated and compared in CarSim simulation environment.

关键词： autonomous vehicle control supervised reinforcement learning trajectory tracking

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Prediction and validation of diffusive uptake rates for indoor volatile organic compounds in axial passive samplers

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Energy and Built Environment 2024年第1期5卷 24-31页

作者： Yan Wang Tao Yu Jinhan Mo Department of Building Science Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Indoor Air Quality Evaluation and Control Beijing 100084China Wuhan Second Ship Design and Research Institute Wuhan 430205China School of Energy and Power Engineering Beihang UniversityBeijing 100191China Key Laboratory of Eco Planning&Green Building Ministry of Education(Tsinghua University)Beijing 100084China

The diffusive uptake rate is essential for using passive samplers to measure indoor volatile organic compounds(VOCs).The traditional theoretical model of passive samplers requires available regression formulas of uptake rates and physicochemical properties of adsorbents to predict the uptake ***,it is difficult to obtain the uptake rates of different VOCs under different sampling periods,and it is also difficult to obtain the physical parameters of adsorbents accurately and *** study provides a reliable numerical prediction method of diffusive uptake rates of *** modeling was based on the standard automated thermal desorption(ATD)tubes packed with Tenax TA and the mass transfer process during *** experimental determinations of toluene uptake rate are carried out to verify the prediction *** uptake rates of typical indoor VOCs are obtained from the literature to calibrate the key apparent parameters in the model by statistical regression *** predicted model can provide the VOC diffusive uptake rates under different sampling duration with an average deviation of less than 5%.This study can provide the basis for fast and accurate prediction of diffusive uptake rates for various VOC pollutants in built environments.

关键词： Indoor air quality Diffusive uptake rate Prediction model Sampling Adsorption

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Application of a Modified Multiparametric PID controller for control of an Electrohydraulic Servo System

Application of a Modified Multiparametric PID Controller for...

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Automatics and Informatics (ICAI), International Conference

作者： Stanimir Yordanov Georgi Mihalev Krasimir Ormandzhiev Stefan Ivanov Department of Automation Information and Control Systems Technical University of Gabrovo Gabrovo Bulgaria Department of Power Engineering Technical University of Gabrovo Gabrovo Bulgaria

ISBN: (数字)9798350353907

ISBN: (纸本)9798350353914

The paper proposes a switching multiparametric control for an electrohydraulic servo system with throttle regulation. The architecture of a MISO (Multiple Input Single Output) control is considered, consisting of a conventional PID controller operating in the deviation control channel and a fuzzy PID controller operating in the disturbance channel. The main issues arising from the use of this type of control are discussed, and an analysis of the stability of the closed-loop system is conducted. Graphic results for the control quality of the designed system are obtained using a universal measurement and control module. The advantages of this type of control and the manifestation of additional robust qualities of the system are experimentally demonstrated.

关键词： Process control Switches Stability analysis Regulation Real-time systems Electrohydraulics Servomotors Transient analysis Tuning Thermal stability

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Switching Multi-regulator control of Electro-Hydraulic Servo System

Switching Multi-regulator Control of Electro-Hydraulic Servo...

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Automatics and Informatics (ICAI), International Conference

作者： Georgi Mihalev Stanimir Yordanov Krasimir Ormandzhiev Department of Automation Information and Control Systems Technical University of Gabrovo Gabrovo Bulgaria Department of Power Engineering Technical University of Gabrovo Gabrovo Bulgaria

ISBN: (数字)9798350353907

ISBN: (纸本)9798350353914

The paper proposes a switching multi-regulator control for an electro-hydraulic servo system with throttle regulation. The architecture of the multi-regulator control, composed of three conventional regulators (PID 1 , PI 2 , PI 3 ) for different regions of the setpoint signal variation and switching logic, is discussed. The main issues arising from the use of such control are considered, and an analysis of the stability of the closed-loop system is conducted. Some mathematical formulas and descriptions are presented. Using a universal measurement and control module, graphical results for the quality of the designed control are obtained. The advantages of this type of control and the emergence of additional robust qualities of the system are experimentally proven.

关键词： Technical requirements System dynamics Stability criteria Switches Real-time systems Time factors Electrohydraulics Closed loop systems Servomotors Transient analysis

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Development of a UAV-based System for Technical Diagnostics of Overhead power Lines 24

Development of a UAV-based System for Technical Diagnostics ...

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24th International Conference on Computational Problems of Electrical engineering, CPEE 2023

作者： Kozlovskyi, Oleksandr Trushakov, Dmitro Rendzinyak, Serhiy Korud, Vasyl Central Ukrainian National Technical University Department of Electrical Systems and Energy Management Kropyvnytskyi Ukraine Central Ukrainian National Technical University Department of Automation and Control in Technical Systems Kropyvnytskyi Ukraine Ivan Franko National University of Lviv Faculty of Electronics and Computer Technologies Lviv Ukraine Lviv Polytechnic National University Institute of Power Engineering and Control System Lviv Ukraine

ISBN: (纸本)9798350330342

The problems associated with the operation of overhead power lines and ways of improving control over their condition with the help of UAVs are considered. A structural diagram of the system of technical diagnostics of overhead lines based on UAVs was developed, for which the necessary diagnostic parameters were selected according to informative criteria. An analysis of types of UAVs was carried out in order to determine their suitability and efficiency of use for diagnosing the condition of overhead lines. © 2023 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Ontology Knowledge Based Multimodal Service Tasking Planning 6

Ontology Knowledge Based Multimodal Service Tasking Planning

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6th International Conference on Electronic engineering and Informatics, EEI 2024

作者： Zhang, Xiaochen Liu, Guoliang Li, Wei Liu, Zhenhua Wang, Shanmei Zhang, Jiwei Wang, Bin Tian, Guohui School of Control Science and Engineering Shandong University Jinan China Big Data and Artificial Intelligence Institute China Telecom Research Institute Beijing China Inspur Intelligent Technology Research Department Jinan China Ji'nan Power Supply Company Department of Development Jinan China State Nuclear Electric Power Planning Design & Research Institute Co. LTD. Department of Investment and Development Beijing China

ISBN: (纸本)9798350353594

Considering smart device and robot having entered the home environment to provide human with convenient services, this paper proposes a multimodal service system to enhance the system dynamic understanding of the environment and dynamic task planning capabilities. The proposed system introduces a family ontology to record information about the object, device, and user. The multimodal information can be acquired and updated automatically to the family ontology. The task planning and execution are introduced to dynamically generate task. Finally, the experiments in a family environment prove that the system has outstanding task processing capabilities and environmental understanding. © 2024 IEEE.

关键词： family ontology multimodal information multimodal service system task planning

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