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检索条件"机构=Electrical Engineering PhD Program of the Faculty of Engineering"

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Investigation of Lightning Overvoltage on 220 kV Transmission Lines in Bhutan Using ATP-EMTP

Investigation of Lightning Overvoltage on 220 kV Transmissio...

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2023 International Conference on Power, Energy and Innovations, ICPEI 2023

作者： Samten Suwanasri, Thanapong Suwanasri, Cattareeya Panmala, Nattapon King Mongkut's University of Technology North Bangkok The Sirindhorn International Thai-German Graduate School of Engineering EPE Program Bangsue Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering Bangsue Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Technical Education Department of Teacher Training in Electrical Engineering Bangsue Bangkok Thailand

ISBN: (纸本)9798350344585

This paper provides an examination of the impact of lightning strikes on a 220 kV double circuit (D/C) high voltage transmission line in Bhutan. The study employs the ATP-EMTP software to identify the leading causes of transmission line faults, which are primarily attributed to lightning strikes. Since the transmission lines run through areas in Bhutan that are prone to severe weather conditions and lightning strikes, they are vulnerable to damage, leading to an unreliable power supply. To address this issue, the author proposes several solutions, such as enhancing the tower footing resistance and installing line surge arresters. The author also created models of different transmission towers and analyzed an 18 km stretch of the transmission line that is highly susceptible to lightning strikes. © 2023 IEEE.

关键词： Electric lines

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On-Board Integrated Charger Based on Open-End Winding AC Machine

On-Board Integrated Charger Based on Open-End Winding AC Mac...

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IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific)

作者： Thidarat Thanakam Neerakorn Jarutus Yuttana Kumsuwan Department of Electrical Engineering Faculty of Engineering Graduate Program in Electrical Engineering Chiang Mai University Chiang Mai Thailand Department of Electrical Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand

This paper presents an on-board integrated charger for electric vehicles (EVs) based on an open-end winding AC machine. To reduce weight, volume, and costs, including additional space area in EVs, the main component of the traction system is utilized as a part of the charger system, i.e., the wound rotor open-end winding AC machine fed by a dual converter with a single battery source. In charging operation, the rotor winding side of the AC machine is at standstill and reconfigured through magnetic contactors to interface with the three-phase utility grid, whereas the stator winding side is still connected to the converters. It performs as a transformer isolated by itself. On the other hand, the rotor windings are shorted together for the driving operation. Besides, the charger system assists the stability of the utility grid by consuming constant power, absorbing maximum power rated at 22 kW. To enhance excellent control, the modulation strategy of the dual converter is determined by means of different phase angles of 120° As a result, the differential-mode voltage problem is suppressed. The simulation results are validated to confirm the performance of the proposed system.

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Control of Three-Level PWM Inverter-Fed Induction Motor Drives

Control of Three-Level PWM Inverter-Fed Induction Motor Driv...

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IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific)

作者： Sutthimat Mueangngoen Neerakorn Jarutus Yuttana Kumsuwan Department of Electrical Engineering Faculty of Engineering Graduate Program in Electrical Engineering Chiang Mai University Chiang Mai Thailand Department of Electrical Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand

This paper presents the control of three-level PWM committed to a three-level twelve-switch inverter-fed induction motor drive. The proposed control is totally capable of extracting the maximum DC utilization with the classical continuous and discontinuous PWM. Moreover, in the light of the multi-level inherency, the low switching frequency is attractive to this application to avoid the high power losses, while it can maintain the stability of the operation. Regardless of the single or double carrier waves, optimized switching states associated with the proposed logical operation part, which is responsible for obtaining the multi-level characteristic of the inverter, are also proposed. Importantly, through the MATLAB/Simulink program, the steady-state and dynamic response of the high-performance drive with the classically indirect vector control are definitely investigated to confirm the effectiveness of the proposed control strategy.

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Comparison of 2L and 3L-NPC Power Converter-Based a Level-2 Isolated Off-Board Charger

Comparison of 2L and 3L-NPC Power Converter-Based a Level-2 ...

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electrical, Computer and Energy Technologies (ICECET), International Conference on

作者： Thidarat Thanakam Yuttana Kumsuwan Department of Electrical Engineering Faculty of Engineering Graduate Program in Electrical Engineering Chiang Mai University Chiang Mai Thailand Department of Electrical Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand

This paper presents an off-board charger system for any electric vehicle based on a single-stage power converter operation that performs as a three-phase pulse width modulation rectifier. To enhance the safety issue by itself, a step-down transformer with galvanic isolation is added. Additionally, the off-board charger system allows bidirectional power flow in both grid-to-vehicle (G2V) and vehicle-to-grid operations. To analyze this system, only G2V operation is shown by comparing a two-level power converter charger with a three-level neutral point clamped power converter charger. In light of its controller, the off-board charger is designed to charge a battery in constant current and constant voltage mode in compliance with Level 2 of charging power. Based on this controller, it can support grid power quality under a unity power factor. Simulation-based verification is conducted on a maximum power rating of 22 kW to claim the performance of steady-state operation and dynamic operation.

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Mapping the Research Landscape : A Bibliometric Study of Flow Rate Sensors and Horizontal Water Pipe

Mapping the Research Landscape : A Bibliometric Study of Flo...

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International Conference on Computing, engineering, and Design (ICCED)

作者： Anang Suryana Anggy Pradiftha Junfithrana Abd Kadir Mahamad Wahyu Mulyo Utomo Osep Hijuzaman Panji Narputro Faculty of Electrical and Electronics Engineering Universiti Tun Hussein Onn Malaysia Batu Pahat Malaysia Faculty of Electrical and Electronics Engineering Nusa Putra University Sukabumi Indonesia Industrial Engineering Study Program STT Wastukancana Bandung Indonesia Electrical Engineering Study Program Nusa Putra University Sukabumi Indonesia

ISBN: (数字)9798331529376

ISBN: (纸本)9798331529383

The significance of flow rate sensors and horizontal water pipes in various applications highlights their crucial role in enhancing fluid dynamics monitoring and management. This study aims to map the research landscape through a bibliometric analysis of flow rate sensors and horizontal water pipes. The analysis includes author analysis, affiliation analysis, country or territory analysis, source analysis, keyword analysis, trend topic analysis, and thematic map analysis. Bibliometric analysis helps policymakers, industry professionals, and researchers navigate the extensive body of literature, ensuring that efforts in flow rate sensor technology and horizontal water pipe research align with current trends and contribute effectively to advancing knowledge in these areas. The results will serve as a valuable guide, helping stakeholders understand the evolving research landscape, make informed decisions, and gain deeper insights into the trajectory of research in flow rate sensors and horizontal water pipes.

关键词： Industries Waste reduction Fluid dynamics System performance Bibliometrics Market research Sensors Trajectory Optimization Monitoring

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Availability of Hydroelectric Generating Units based on the Maintenance Schedule

Availability of Hydroelectric Generating Units based on the ...

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International Conference on Electromechanical and Power Systems (SIELMEN)

作者： Ionuţ Ilişescu Ciprian Mircea Nemes Florin Constantin Băiceanu PhD Graduate School of Faculty of Electrical Engineering “Gheorghe Asachi” Technical University Iasi Romania Faculty of Electrical Engineering “Gheorghe Asachi” Technical University Iasi Romania

The paper uses the technique called “frequency and duration”, a continuous-time Markov chain, for evaluation of availability and reliability indicators of a hydroelectric power station using the operational data spanning 12 years (2010 ÷2021). The availability and reliability of individual units and for the entire power station are evaluated using failure rate λ, repair rate µ, Mean Time To Repair, Mean Time Between Failures, Mean Time To Failure, state probability, state frequency and departure rate.

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Novel Hybrid Algorithm for Investigation of Dissolved Gas Analysis for Alternate Dielectric Fluids of Power Transformer

Novel Hybrid Algorithm for Investigation of Dissolved Gas An...

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Smart and Sustainable Developments in electrical engineering (SSDEE), IEEE International Conference on

作者： Rahul Soni Raymon Antony Raj Bishal Silwal Rahman Azis Prasojo M.M.F. Darwish Norazhar Abu Bakar Electrical and Electronics Engineering Program Navrachana University Vadodara Gujarat India Department of Electrical and Electronics Engineering Kongu Engineering College Perundurai Erode Tamil Nadu India Department of Electrical Engineering Tribhuvan University Institute of Engineering (Pulchowk Campus) Pulchowk Lalitpur Nepal Department of Electrical Engineering Politeknik Negeri Malang Malang Indonesia Department of Electrical Engineering Faculty of Engineering Shoubra Benha University Cairo Egypt Department of Electrical Engineering Faculty of Engineering Universiti Teknologi PETRONAS Perak Malaysia

ISBN: (数字)9798331542108

ISBN: (纸本)9798331542115

The power transformer is the most important element of equipment in an electrical transmission and distribution network. The power and voltage levels that these transformers can manage determine their size, and as the transformer's volume increases, internal isolation and cooling become more challenging. The most popular insulating fluid used in transformers for insulation and cooling is mineral-based oil, which has demonstrated exceptional dielectric and thermal qualities. However, alternative oil technologies have been sought to replace mineral-based oils in recent years because to concerns about safety, cost, and environmental impact. In this context, extensive research efforts have emerged on biological oils for use in transformers. This paper examines the sustainability, safety, and electrical performance of bio-based ester oil in transformer applications with respect to dissolved gas analysis (DGA). AI-based Fuzzy logic controller (FLC) with Duval's triangle (DT) and Duval's pentagon (DP), IEC, CIGRE reports are used in a hybrid manner to identify the possible incipient faults inside the oil-immersed transformers. The graphical analysis of various fuzzy logic plots along with DT and DP are utilized to critically analyze the possible incipient faults arrayed due to DGA. The proposed work proficient compared to previously published results. Highest efficiency of DT and DP based FLC (92%), followed by furan analysis (82.3%). Lastly, recommendations are made on potential fixes for the problems raised and the future course of study for alternate dielectric fluids-based power transformers. The suggested techniques in this research offer a higher diagnostic accuracy than the present approach.

关键词： Fuzzy logic Oils Cellulose Oil insulation Dissolved gas analysis Dielectrics Safety Dielectric liquids Sustainable development Power transformer insulation

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Energy Management by Operation Scheduling for Blood Analyzer in a Hospital

Energy Management by Operation Scheduling for Blood Analyzer...

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Power and Renewable Energy engineering (PREE), International Conference on

作者： Chanwich Phromthanakit Pattarabordee Khaigunha Amnart Suksri Tanakorn Wongwuttanasatian Energy Engineering Program Faculty of Engineering Khon Kaen University Khon Kaen Thailand Department of Electrical Engineering Faculty of Engineering Nakhon Phanom University Nakhon Phanom Thailand Department of Electrical Engineering Faculty of Engineering Khon Kaen University Khon Kaen Thailand Department of Mechanical Engineering Faculty of Engineering Khon Kaen University Khon Kaen Thailand

ISBN: (数字)9798350366808

ISBN: (纸本)9798350366815

Currently, many patients visit hospitals to check for bodily abnormalities, prompting hospitals to operate blood specimen analyzers (Cobas-8000) in laboratories to accommodate blood samples at all times. However, the number of patients is not consistently high, leading to inefficient usage of the chemical analysis machines. This research presents energy management for the Cobas-8000 model C702 blood specimen analyzer by scheduling the machine's operation to match the volume of blood samples, thereby reducing operational costs. These costs include electricity usage and the depreciation of the analyzer equipment. The research categorizes conditions based on the number of blood tests sent for analysis and the operational status of the analyzer, which includes Full Operation Mode, Standby Mode, and Off Mode, considering two situations before and after implementing the proposed method. Previously, the results indicate that the energy consumption of the blood specimen analyzer does not correspond to the volume of blood samples, resulting in unnecessary depreciation costs. By introducing the proposed scheduling, divided into six case studies, it is demonstrated that energy consumption and equipment depreciation can be significantly reduced, achieving a total cost reduction of 47.95%-59.71 % per year compared to the existing continuous full operation mode.

关键词： Solid modeling Energy consumption Analytical models Renewable energy sources Costs Hospitals Electricity Energy management Sustainable development Blood

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A Solid-State Pulse Power Generator Employed Magnet Switch for Dielectric Barrier Discharge Applications Based on Resonance Charging Concept

A Solid-State Pulse Power Generator Employed Magnet Switch f...

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2022 IEEE Industry Applications Society Annual Meeting, IAS 2022

作者： Tabrizi, Yazdan H. Uddin, M. Nasir Allahyari, Hesamodin Lakehead University LU-GC Program Dept. of Electrical Engineering BarrieONL4M 3X9 Canada Faculty of Electrical Engineering Tehran Iran

ISBN: (数字)9781665478151

ISBN: (纸本)9781665478151

This paper presents a novel high voltage pulse power generator layout that is well suited to dielectric barrier discharge applications. To reach the higher gain, a push-pull circuit with a three-winding transformer is used on the charging side, along with quasi-resonant between the transformer leakage inductance and the capacitor on the high-voltage section. The primary side's two windings and two low voltage switches allow the gadget to generate either unipolar or bipolar high voltage exponential pulses from an approximately low DC source. Instead of a bidirectional switch, a magnet one is employed since it eliminates the concerns of series and parallel connections of semiconductor switches in high voltage side, resulting in a low degree of switching complexity. Hence, In addition to accomplishing the high gain objective, the effort focuses on lowering the number of circuit elements and control complexity in contrast to previous topologies. The generator operates in discontinuous conduction mode, which improves the system efficiency by allowing for the generation of full positive and/or negative waves while it also reduces the conduction losses. The operation phases of the pulse generator are detailed. It is found from the simulation results that the proposed pulse generator outperforms the previous structures in terms of control complexity, number of switches, and flexibility. © 2022 IEEE.

关键词： Dielectric barrier discharge

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Classifying Tweet Sentiment Analysis on Airlines using Random Forest Classifier, Naïve Bayes Classifier and K-Nearest Neighbors Classifier Algorithm

Classifying Tweet Sentiment Analysis on Airlines using Rando...

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2023 International Conference on Artificial Intelligence Robotics, Signal and Image Processing, AIRoSIP 2023

作者： Alexander, Ivan Heryadi, Yaya Lukas Suparta, Wayan Sonata, Ilvico Bina Nusantara University Binus Graduate Program Computer Science Computer Science Departement Jakarta11480 Indonesia Universitas Katolik Indonesia Atma Jaya Cognitive Engineering Research Group Faculty of Engineering Jakarta12930 Indonesia Institut Teknologi Nasional Yogyakarta Faculty of Industrial Technology Department of Electrical Engineering Yogyakarta55281 Indonesia

ISBN: (纸本)9798350327472

Opinion has always affected businesses and individuals especially from the Public. People react through social media and spread it incompletely. The situation was then accepted as public opinion. There are three categories of opinion i.e., positive, negative, and neutral. To investigate public opinion on a particular issue of interest, sentiment analysis might be employed. By offering a solution to the text classification challenge, this experiment focuses on the perception of airline tweets among the American public. We offer a method to classify tweets as positive, negative, or neutral using three machine learning classifiers: Random Forest Classifier, Naive Bayes Classifier, and K-Nearest Neighbors Classifier. We examined the performance of three machine learning classifiers in terms of accuracy, average precision, average recall, and average f-1 score. The results demonstrate that the Random Forest Classifier, which produces 82% accuracy, 80% average precision, 82% average recall, and 80% average f1-score, performs the best among the machine learning classifiers. © 2023 IEEE.

关键词： Tweets

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