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Journal articles on the topic 'Electrical power systems. eng'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Raximovich, Allaev Kaxramon, and Makhmudov Tokhir Farkhadovich. "Analysis of Small Oscillations in Complex Electric Power Systems." Engineering 10, no. 05 (2018): 253–61. http://dx.doi.org/10.4236/eng.2018.105017.

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Kalimoldayev, Maksat, Aleksey Drozdenko, Igor Koplyk, T. Marinich, Assel Abdildayeva, and Tamara Zhukabayeva. "Analysis of modern approaches for the prediction of electric energy consumption." Open Engineering 10, no. 1 (2020): 350–61. http://dx.doi.org/10.1515/eng-2020-0028.

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AbstarctA review of modern methods of forming a mathematical model of power systems and the development of an intelligent information system for monitoring electricity consumption. The main disadvantages and advantages of the existing modeling approaches , as well as their applicability to the energy systems of Ukraine and Kazakhstan,are identified. The main factors that affect the dynamics of energy consumption are identified. A list of the main tasks that need to be implemented in order to develop algorithms for predicting electricity demand for various objects, industries and levels has bee

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Alhmoud, Lina, and Hussein Al-Zoubi. "IoT Applications in Wind Energy Conversion Systems." Open Engineering 9, no. 1 (2019): 490–99. http://dx.doi.org/10.1515/eng-2019-0061.

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AbstractRenewable energy reliability has been the main agenda nowadays, where the internet of things (IoT) is a crucial research direction with a lot of opportunities for improvement and challenging work. Data obtained from IoT is converted into actionable information to improve wind turbine performance, driving wind energy cost down and reducing risk. However, the implementation in IoT is a challenging task because the wind turbine system level and component level need real-time control. So, this paper is dedicated to investigating wind resource assessment and lifetime estimation of wind powe

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Diamenu, Godwin. "Statistical Analysis of Electric Power Distribution Grid Outages." European Journal of Engineering and Technology Research 6, no. 3 (2021): 27–33. http://dx.doi.org/10.24018/ejers.2021.6.3.2406.

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Power systems in general supply consumers with electrical energy as economically and reliably as possible. Reliable electric power systems serve customer loads without interruptions in supply voltage. Electric power generation facilities must produce enough power to meet customer demand. Electrical energy produced and delivered to customers through generation, transmission and distribution systems, constitutes one of the largest consumers markets the world over. The benefits of electric power systems are integrated into the much faster modern life in such extent that it is impossible to imagin

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SK, Abdul Pasha, and Prema kumar N. "Review of Power Quality Issues and Mitigation Techniques in Electrical Power Systems." International Journal of Engineering Technology and Management Sciences 4, no. 5 (2020): 116–20. http://dx.doi.org/10.46647/ijetms.2020.v04i05.021.

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Power quality complications are treated as interrupted voltage, current or frequency which reflects as malfunction of connected elements at end levels. User system models, smoothen loads of industries and crucial, regular operations of all effected by kinds of outcomes & line distortions, they can impact with economy of the whole system. Here the power quality includes the enhancement of voltage quality, source power factor, control of harmonic distortions, voltage sags and swells. The devices selected for power quality improvement are DSTATCOM, Hybrid active power filters, Dynamic voltage

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Karthikeyan, D., Sayon Koley, Mayukh Bagchi, Avijit Bhattacharya, and K. Vijayakumar. "Wireless charging scheme for medium power range application systems." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 4 (2020): 1979. http://dx.doi.org/10.11591/ijpeds.v11.i4.pp1979-1986.

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Wireless power transmission (WPT) has attracted a wide variety of subjects in various disciplines and has also become a highly active research field due to its capacity to facilitate charging systems. Wireless power transmission will be compulsory to use soon as this technology enables electrical energy to be transmitted from a power source to an electrical load over an air gap without connecting wires. Wireless power transmission has been developed in the low power (1W to 10W) and high power (100W-500W) region. While the low power region development focuses on powering medical transplants and

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Cazacu, Emil, Marilena Stănculescu, and Horia Andrei. "On the Correction of the Power Factor in Modern Low-Voltage Power Electrical Installations." Scientific Bulletin of Electrical Engineering Faculty 17, no. 2 (2017): 10–15. http://dx.doi.org/10.1515/sbeef-2017-0003.

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AbstractThe paper presents the main electrical loads that require reactive power, evaluating also its value in different operating states of the industrial installation (permanent sinusoidal or distorted). Also, the effects of reactive power flow in the networks are quantitatively estimated and accordingly, a series of specific power quality indicators (e.g. power factor, crest factor, total harmonic distortion) are highlighted. Different types of solutions dedicated to reduce the level of reactive power are also suggested. The proper design of the power factor correction systems is directly c

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Gaol, Ford Lumban, Lufty Abdillah, and Tokuro Matsuo. "Adoption of Business Intelligence to Support Cost Accounting Based Financial Systems — Case Study of XYZ Company." Open Engineering 11, no. 1 (2020): 14–28. http://dx.doi.org/10.1515/eng-2021-0002.

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AbstractXYZ is a company engaged in the port sector. To support the company’s business processes, XYZ uses two applications to carry out operational activities, namely the CARTOS application to manage invoices and the Finance application to record company costs and revenues. To produce a cost accounting report, XYZ is still processing and visualizing it manually with data sources from the two applications mentioned earlier. This resulted in quite a long time processing data into information. So that reporting to management cannot be done in real time. Therefore XYZ needs a system that can help

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Zimmer, Steve, Martin Helwig, Peter Lucas, Anja Winkler, and Niels Modler. "Systematic Design Approach for Functional Integration of Vehicular Wireless Power Transfers Modules." Computers 10, no. 5 (2021): 61. http://dx.doi.org/10.3390/computers10050061.

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This paper presents a systematic design approach to the development of functionally integrated mechanical-electrical lightweight systems. The development of these systems requires the end-to-end consideration of all product domains involved, aspects of lightweight design and their mutual interdependencies. To manage this complexity, a specialized approach is developed, which extends the V-model of VDI 2206 problem-specific and purpose-oriented. In line with the proposed approach, this work presents the conception and evaluation of three functionally integrated on-board receiver units of automo

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Eldridge, Paul, Brian Simpson, and James Gilbart. "The Role of Rechargeable Systems in Neuromodulation." European Neurological Review 6, no. 3 (2011): 187. http://dx.doi.org/10.17925/enr.2011.06.03.187.

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Neuromodulation is an effective treatment for many types of neuropathic pain but a significant limitation of any neuromodulating system is that electrical power must be conveyed in a reliable and sterile way to an implanted electronic device and transmitted to its associated electrodes. In recent decades radio-frequency-coupled devices and internal pulse generators have been developed. These were significant advances but were limited either by the need for bulky external power sources or the need for surgery at intervals to replace the internal system battery. More recently, rechargeable neuro

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11

Dziedziak, Paweł, Tomasz Szczepański, Andrzej Niewczas, and Marcin Ślęzak. "Car reliability analysis based on periodic technical tests." Open Engineering 11, no. 1 (2021): 630–38. http://dx.doi.org/10.1515/eng-2021-0061.

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Abstract This article presents the results of the analysis of data from 500 vehicle control stations concerning periodic tests of passenger cars in the number of 2 million. Based on the collected data, a database of vehicles has been prepared to cover technical information, such as model, mass, engine capacity and maximum power. This information has been summarized with the exploitation data such as age of the car, distance traveled, the area in which the vehicle was most frequently used, the use for business or private purposes, and intensity of operation that was measured by the ratio of kil

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Ion, V., A. Gheorghe, and E. Diaconu. "Electrical Characteristics Measuring Device for Security Systems." Scientific Bulletin of Electrical Engineering Faculty 21, no. 1 (2021): 60–63. http://dx.doi.org/10.2478/sbeef-2021-0012.

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Abstract The study aims for the development of a device that is capable to measure and store the electrical characteristics of security systems. The development of the device is done by using the Arduino Mega 2650 board, Arduino Ethernet shield 2, SD card module, 1.8” TFT ISP LCD, keyboard module, ASC712 current sensors, A.C voltage sensors and D.C voltage sensors. The measured data from the current and voltage sensors is stored on the SD card module and sent to the user via the ethernet connection. The data obtained from the device is useful to keep track of the power consumption of any secur

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Nunez, Angel. "Hybrid systems in electrical distribution design with genetic algorithm." minerva 1, no. 1 (2020): 32–42. http://dx.doi.org/10.47460/minerva.v1i1.4.

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The incorporation of hybrid systems based on renewable sources for the optimization of electricity distribution systems and planning of power supply strategies using genetic algorithms (GA) is studied. A series of characteristics of electrical sub-stations was chosen and through simulations, data were obtained for the optimization of the existing infrastructure, which provides reliability, security, economic supply and quality of service. An algorithm was obtained with the optimal configuration of various components: photovoltaic panels, batteries, AC generator, fuel cell and inverter, which i

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Chetry, Bharat, and Navaraj Raj Karki. "Adequacy Assessment of Integrated Nepal Power System." U.Porto Journal of Engineering 1, no. 2 (2018): 13–22. http://dx.doi.org/10.24840/2183-6493_001.002_0002.

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Modern electrical power systems have the responsibility of providing a reliable and economic supply of electrical energy to their customers. The economic and social effects of loss of electric service can have significant impacts on both the utility supplying electric energy and the end users of the service. Maintaining a reliable power supply is a very important issue in power system design and operation .The developing country including Nepal more often does not follow the modern planning criteria for system planning due to which we have to face problems like load shedding. This work is an e

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Stesina, Fabrizio. "Validation of a Test Platform to Qualify Miniaturized Electric Propulsion Systems." Aerospace 6, no. 9 (2019): 99. http://dx.doi.org/10.3390/aerospace6090099.

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Miniaturized electric propulsion systems are one of the main technologies that could increase interest in CubeSats for future space missions. However, the integration of miniaturized propulsion systems in modern CubeSat platforms presents some issues due to the mutual interactions in terms of power consumption, chemical contamination and generated thermal and electro-magnetic environments. The present paper deals with the validation of a flexible test platform to assess the interaction of propulsion systems with CubeSat-technologies from mechanical, electrical, magnetic, and chemical perspecti

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16

Ke, Haotao, Adam Morgan, Ronald Aman, and Douglas C. Hopkins. "Investigation of Rapid-Prototyping Methods for 3D Printed Power Electronic Module Development." International Symposium on Microelectronics 2014, no. 1 (2014): 000887–92. http://dx.doi.org/10.4071/isom-thp52.

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The recent research in wide-bandgap (WBG) power electronic semiconductors has produced a wide variety of device and combinational topologies, such as HFETS, MOSHFETS, and the Cascode Pair. Each variation needs to be tested with certain package criteria (e.g. high voltage SiC devices up to 15kV, high current GaN devices up to 300A, or unprecedented high frequencies). Having a common package is costly and cannot provide an investigation of optimized performance. Hence, use of a rapid prototyping method to print power electronic packages and modules is needed. Also, the continual move to higher f

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17

Florkowski, Marek. "Classification of Partial Discharge Images Using Deep Convolutional Neural Networks." Energies 13, no. 20 (2020): 5496. http://dx.doi.org/10.3390/en13205496.

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Artificial intelligence-based solutions and applications have great potential in various fields of electrical power engineering. The problem of the electrical reliability of power equipment directly refers to the immunity of high-voltage (HV) insulation systems to operating stresses, overvoltages and other stresses—in particular, those involving strong electric fields. Therefore, tracing material degradation processes in insulation systems requires dedicated diagnostics; one of the most reliable quality indicators of high-voltage insulation systems is partial discharge (PD) measurement. In thi

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18

Kumar, Umesh. "A Retrospection of Chaotic Phenomena in Electrical Systems." Active and Passive Electronic Components 21, no. 1 (1998): 1–15. http://dx.doi.org/10.1155/1998/32462.

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In the last decade new phenomena have been observed in all areas of non linear dynamics, principal among these being ‘Chaotic phenomena’. Chaos has been reported virtually from every scientific discipline. This paper summarizes a study of the chaotic phenomena in electrical systems and attempts to translate the mathematical ideas and techniques into language that engineers and applied scientists can use to study ‘Chaos’. Towards this end, the paper has summarized the study of chaos in several examples like Chua’s circuit family; Folded Torus circuit; non-autonomous circuits; switched capacitor

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19

Lee, Kenneth, Edward Miguel, and Catherine Wolfram. "Appliance Ownership and Aspirations among Electric Grid and Home Solar Households in Rural Kenya." American Economic Review 106, no. 5 (2016): 89–94. http://dx.doi.org/10.1257/aer.p20161097.

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In Sub-Saharan Africa, there are active debates about whether increases in energy access should be driven by investments in electric grid infrastructure or small-scale “home solar” systems (e.g., solar lanterns and solar home systems). We summarize the results of a household electrical appliance survey and describe how households in rural Kenya differ in terms of appliance ownership and aspirations. Our data suggest that home solar is not a substitute for grid power. Furthermore, the environmental advantages of home solar are likely to be relatively small in countries like Kenya, where grid po

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Correa-Henao, Gabriel Jaime, and José María Yusta-Loyo. "Representation of Electric Power Systems by Complex Networks with Applications to Risk Vulnerability Assessment." DYNA 82, no. 192 (2015): 68–77. http://dx.doi.org/10.15446/dyna.v82n192.48574.

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<p>The occurrence of impact events (e.g. blackouts with vast geographic coverage) into electrical critic infrastructure systems usually require the analysis of cascade failure root causes through the conduction of structural vulnerability studies, with well-defined methodologies that may guide decision-making for implementation of preventing actions and for operation recovering into the power system (e.g. N-1 and N-t contingency studies). This technical contribution provides some alternative techniques based upon complex networks and graph theory, which in the last few years have been pr

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Ott, T., M. Schossig, V. Norkus, and G. Gerlach. "Efficient thermal infrared emitter with high radiant power." Journal of Sensors and Sensor Systems 4, no. 2 (2015): 313–19. http://dx.doi.org/10.5194/jsss-4-313-2015.

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Abstract. Sensitive and selective gas measurements are crucial for a large variety of applications, e.g., explosion protection. Optical gas detection is usually based on the gas' absorption of infrared radiation (IR). It is the leading technique in terms of accuracy, reliability, and economic efficiency. Since most gas measurements are made in the two wavelength ranges of (3 ... 5) and (8 ... 14) μm, a broadband IR source is necessary. In this paper, we report on a novel thermal IR emitter with high radiant power and a near-blackbody emission characteristic that can be modulated electrically.

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Şala, Derda E., Yaser Dalveren, Ali Kara, and Mohammad Derawi. "Design and Optimization of Piezoelectric-Powered Portable UV-LED Water Disinfection System." Applied Sciences 11, no. 7 (2021): 3007. http://dx.doi.org/10.3390/app11073007.

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Due to the environmental pollution threatening human life, clean water accessibility is one of the major global issues. In this context, in literature, there are many portable water disinfection systems utilizing ultraviolet (UV) radiation. UV water disinfection systems employ piezoelectric-based electric power along with UV light-emitting diode (LED) sources. This paper elaborates on the detailed design and parametric optimization of a portable UV disinfection system. The proposed system aims to generate piezoelectric harvesting-based electrical power simply by shaking, and the generated powe

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23

Sah, Neeraj Kumar, Madhab Uprety, Sangharsha Bhandari, Prativa Kharel, Saurav Suman, and Ramesh Kumar Maskey. "Prospects of Storage and Pumped-Storage Hydropower for Enhancing Integrated Nepal Power Systems." Hydro Nepal: Journal of Water, Energy and Environment 15 (October 22, 2014): 37–41. http://dx.doi.org/10.3126/hn.v15i0.11290.

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An Integrated Power System (IPS) should have electrical energy generating plants for base load (e.g., nuclear and thermal plants) and peak load (e.g., hydropower plants) so that they can work in coordination in such a way that the demand is met in time. In Nepal, the Integrated Nepal Power System (INPS) is a hydro-dominated system where the base and intermediate power demands are covered primarily by run-of-river hydropower plants and the peak demand by seasonal storage and several diesel power plants of lower capacity. The INPS should have sufficient natural storage and forced storage power p

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Majchrzak, Henryk, and Michał Kozioł. "Analysis of Various Options for Balancing Power Systems’ Peak Load." Energies 14, no. 2 (2021): 513. http://dx.doi.org/10.3390/en14020513.

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The balancing of the power of the Polish Power System (KSE) is a key element in ensuring the safety of electric energy supplies to end users. This article presents an analysis of the power demand in power systems (PS), with emphasis on the typical power variability both in subsequent hours of the day and on particular days and in particular months each year. The methodology for calculating the costs of electric energy undelivered to the end users and the amount of these costs for KSE is presented. Different possibilities have been analyzed for balancing power systems’ peak load and assumptions

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Mekkanen, Mike, and Kimmo Kauhaniemi. "Wireless Light-Weight IEC 61850 Based Loss of Mains Protection for Smart Grid." Open Engineering 8, no. 1 (2018): 182–92. http://dx.doi.org/10.1515/eng-2018-0022.

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Abstract This paper presents a novel Loss of Mains (LoM) protection method based on IEC 61850 Manufacturing Messages Specification (MMS) protocol over wireless Global System for Mobile Communication (GSM) based access point name (APN) mechanism. LoM or anti islanding protection is a key requirement in modern power distribution grids where there is significant amount of distributed energy resources (DER). The future Smart Grids are based on extensive communication capabilities and thus the communication based LoM approaches will also become dominant. The IEC 61850 standard based systems are gai

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Jenal, Norhisyam, Wahyu Kuntjoro, Thomas Arthur Ward, Khairul Imran Sainan, and Firdaus Mohamad. "Performance Analysis of Ground-Based Static Test for Hydrogen Fuelcell Propulsion System." Applied Mechanics and Materials 393 (September 2013): 510–15. http://dx.doi.org/10.4028/www.scientific.net/amm.393.510.

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Combustion engines are increasingly being regarded as unsustainable in the long-term, because of their negative impact on the environment (e.g. pollution, green-house gas production, and global warming). This has generated worldwide interest in propulsion systems based on renewable alternative energy sources for the future. Fuel cell technology is a promising alternative power source because of their high specific energy, efficiency, and reliability. Hydrogen proton exchange membrane fuel cell (PEMFC) in particular produces zero carbon emissions by having only water vapor as the exhaust. Altho

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Zahri, Mustapha, Youssef Menchafou, Hassane El Markhi, and Mohamed Habibi. "Simplified Method for Single Line to Ground-Fault Location in Electrical Power Distribution Systems." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 2 (2015): 221. http://dx.doi.org/10.11591/ijece.v5i2.pp221-230.

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<p>Power distribution systems play important roles in modern society. When distribution system outages occur, speedy and precise fault location is crucial in accelerating system restoration, reducing outage time and significantly improving system reliability, and then improves the quality of services and customer satisfaction. In this paper, we propose a reduced algorithm utilizing the sum of sending-end currents of the three phases to calculate the fault current, and therefore, avoid the iterative aspect of the classic algorithm for single line to ground fault location and reduce its co

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Katic, Nenad. "Profitability of smart grid solutions applied in power grid." Thermal Science 20, suppl. 2 (2016): 371–82. http://dx.doi.org/10.2298/tsci151005023k.

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The idea of a Smart Grid solution has been developing for years, as complete solution for a power utility, consisting of different advanced technologies aimed at improving of the efficiency of operation. The trend of implementing various smart systems continues, e.g. Energy Management Systems, Grid Automation Systems, Advanced Metering Infrastructure, Smart power equipment, Distributed Energy Resources, Demand Response systems, etc. Futhermore, emerging technologies, such as energy storages, electrical vehicles or distributed generators, become integrated in distribution networks and systems.

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Cao, Junwei, Yuxin Wan, Haochen Hua, and Yuchao Qin. "Delay Analysis for End-to-End Synchronous Communication in Monitoring Systems." Sensors 18, no. 11 (2018): 3615. http://dx.doi.org/10.3390/s18113615.

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With the rapid development of smart grid technologies, communication systems are further integrated in the existing power grids. The real-time capability and reliability of the power applications are receiving increasing concerns. Thus, it is important to measure the end-to-end delay in communication systems. The network calculus theory has been widely applied in the communication delay measuring tasks. However, for better operation performance of power systems, most power applications require synchronous data communication, in which the network calculus theory cannot be directly applied. In t

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Zaghwan, Ashraf, and Indra Gunawan. "Resolving Energy Losses Caused by End-Users in Electrical Grid Systems." Designs 5, no. 1 (2021): 23. http://dx.doi.org/10.3390/designs5010023.

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This study utilises the Pareto approach to highlight the energy losses that mainly originate from the phenomena of tiny, initiated events created by end-users of electricity in Australia. Simulation modelling was applied through two stages to examine residential households’ electricity consumption behaviour in New South Wales, Australia. Stage one analysis applied Hierarchical agglomerative clustering and a dendrogram to denote the respective Euclidean distance between the different clusters. Heat maps and threshold value area charts were used to compare the mean power demand for six respectiv

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Elmouatamid, Abdellatif, Youssef NaitMalek, Mohamed Bakhouya, et al. "An energy management platform for micro-grid systems using Internet of Things and Big-data technologies." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 233, no. 7 (2019): 904–17. http://dx.doi.org/10.1177/0959651819856251.

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Micro-grid systems have been recently emerged for efficient integration and management of renewable energy sources, buildings’ equipment (e.g. ventilation; lighting; heating, ventilation, and air conditioning), and energy storage devices. The intermittent nature of the produced electricity from renewable energy sources constitutes, however, the main challenge for their seamless integration into buildings. Recent studies stated that storage devices, despite their actual high cost, could be used to tackle this issue by balancing between the variability of renewable energy sources production and

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Lin, Chi Hsiang. "Whole-Circuit Models for the BDCM/LBDCM Driven Electro-Mechanical Systems." Advanced Materials Research 301-303 (July 2011): 1687–92. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.1687.

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BDCM/ LBDCM driven systems include both the electrical and mechanical parts. So there is a gap for students of electrical engineering background to learn about the subject, even though there have been so many activities (e.g. simulations and experiments) to assist their learning. In this paper, we proposed the whole-circuit models to overcome the difficulty. Since the EE department students are good at circuit analysis, such whole-circuit models will be a good medium for them to solve problems regarding electro-mechanical interactions. For example, the model can be used to modify the torsional

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GARCIA RODRIGUEZ, CARLOS ALBERTO, PEDRO QUINTO DIEZ, JOSE ALFREDO JIMENEZ BERNAL, and IGNACIO CARVAJAL MARISCAL. "ELECTRICAL POWER GENERATED FROM AN OPERATING DESKTOP COMPUTER THROUGH WASTE HEAT RECOVERY." DYNA 96, no. 4 (2021): 345. http://dx.doi.org/10.6036/10150.

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Use of heat recovery systems applied to different industries as a technology to increase energy efficiency [1] is becoming more and more common, one third of the total energy consumption is related to the industrial sector, and of this, about fifty percent is wasted as heat [2]. Increasing use of different types of computers forces us to rethink the possibility of improving their energy efficiency and consequently reducing their energy consumption.

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Frenkel, Wiebke, Andreas Rauh, Julia Kersten, and Harald Aschemann. "Experiments-Based Comparison of Different Power Controllers for a Solid Oxide Fuel Cell Against Model Imperfections and Delay Phenomena." Algorithms 13, no. 4 (2020): 76. http://dx.doi.org/10.3390/a13040076.

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Solid oxide fuel cell systems such as those presented in this paper are not only applicable for a pure supply with electric energy, they can typically also be used in decentralized power stations, i.e., as micro-cogeneration systems for houses, where both electric and thermal energy are required. For that application, obviously, the electric power need is not constant but rather changes over time. In such a way, it essentially depends on the user profiles of said houses which can refer to e.g., private households as well as offices. The power use is furthermore not predefined. For an optimal o

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Dismukes, John P., Lawrence K. Miller, Andrew Solocha, and John A. Bers. "Wind Energy Electrical Power Generation Industry Life Cycle - Impact of Modern Materials Systems on Economic Viability." Key Engineering Materials 380 (March 2008): 43–65. http://dx.doi.org/10.4028/www.scientific.net/kem.380.43.

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This study addresses past, current and future development of the wind electrical power industry, that began prior to 1890 in Cleveland, Ohio and Askov, Denmark. Overcoming technological, business, societal and political hurdles required approximately 120 years of exploration to establish wind electricity generation as a radical innovation entering the acceleration stage of the industrial technology life cycle. Materials and integrated materials systems featuring mechanical, structural, fluid dynamic, electrical, electronic, and telecommunications functionality developed and introduced over tha

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Brenna, Morris, Vittorio Bucci, Maria Carmen Falvo, et al. "A Review on Energy Efficiency in Three Transportation Sectors: Railways, Electrical Vehicles and Marine." Energies 13, no. 9 (2020): 2378. http://dx.doi.org/10.3390/en13092378.

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The present paper is a review on efficiency issues related to three important sectors of the transportation systems: railways, electrical vehicles, and marine. For the three sectors, the authors, in reference of their knowledge and research area, show the results of a wide literature analysis, in order to highlight which are the measures, in terms of technological solutions and management techniques, which are recently investigated and implemented, for improving the three transportation systems, from the point of view of efficiency. In particular, for the railway transportation sector, a wide

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Grzebielec, Andrzej, Artur Rusowicz, and Adam Szelągowski. "Air purification in industrial plants producing automotive rubber components in terms of energy efficiency." Open Engineering 7, no. 1 (2017): 106–14. http://dx.doi.org/10.1515/eng-2017-0015.

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AbstractIn automotive industry plants, which use injection molding machines for rubber processing, tar contaminates air to such an extent that air fails to enter standard heat recovery systems. Accumulated tar clogs ventilation heat recovery exchangers in just a few days. In the plant in which the research was conducted, tar contamination causes blockage of ventilation ducts. The effect of this phenomenon was that every half year channels had to be replaced with new ones, since the economic analysis has shown that cleaning them is not cost-efficient. Air temperature inside such plants is often

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Parikh, Primit, Yi Feng Wu, and Li Kun Shen. "Commercialization of High 600V GaN-on-Silicon Power Devices." Materials Science Forum 778-780 (February 2014): 1174–79. http://dx.doi.org/10.4028/www.scientific.net/msf.778-780.1174.

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With power conversion losses endemic in all areas of electricity consumption, broadlycategorized into motion control (accounting for around 50% of total electrical energy use), lighting,air conditioning, and information technology, consumers, governments and utilities are finding waysto achieve higher efficiency. Manufacturers of data servers, telecom systems, solar power invertersand drives for motor control are focused on reducing power conversion losses while simultaneouslyshrinking the size of power systems. Although silicon has historically been the base device materialused by the power c

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Nagothu, Deeraj, Yu Chen, Erik Blasch, Alexander Aved, and Sencun Zhu. "Detecting Malicious False Frame Injection Attacks on Surveillance Systems at the Edge Using Electrical Network Frequency Signals." Sensors 19, no. 11 (2019): 2424. http://dx.doi.org/10.3390/s19112424.

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Over the past few years, the importance of video surveillance in securing national critical infrastructure has significantly increased, with applications including the detection of failures and anomalies. Accompanied by the proliferation of video is the increasing number of attacks against surveillance systems. Among the attacks, False Frame Injection (FFI) attacks that replay video frames from a previous recording to mask the live feed has the highest impact. While many attempts have been made to detect FFI frames using features from the video feeds, video analysis is computationally too inte

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Kularatna, Nihal, Kasun Subasinghage, Kosala Gunawardane, Dilini Jayananda, and Thilanga Ariyarathna. "Supercapacitor-Assisted Techniques and Supercapacitor-Assisted Loss Management Concept: New Design Approaches to Change the Roadmap of Power Conversion Systems." Electronics 10, no. 14 (2021): 1697. http://dx.doi.org/10.3390/electronics10141697.

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All electrical and electronic devices require access to a suitable energy source. In a portable electronic product, such as a cell phone, an energy storage unit drives a complex array of power conversion stages to generate multiple DC voltage rails required. To optimize the overall end-to-end efficiency, these internal power conversions should waste minimal energy and deliver more to the electronic modules. Capacitors are one of the main component families used in electronics, to store and deliver electric charges. Supercapacitors, so called because they provide over a million-fold increase in

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Chen, Taihai, Evangelos B. Mazomenos, Koushik Maharatna, Srinandan Dasmahapatra, and Mahesan Niranjan. "Design of a Low-Power On-Body ECG Classifier for Remote Cardiovascular Monitoring Systems." IEEE Journal on Emerging and Selected Topics in Circuits and Systems 3, no. 1 (2013): 75–85. http://dx.doi.org/10.1109/jetcas.2013.2242772.

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Barberis, Stefano, Andrea Giugno, Giacomo Sorzana, Miguel F. P. Lopes, and Alberto Traverso. "Techno-economic analysis of multipurpose OTEC power plants." E3S Web of Conferences 113 (2019): 03021. http://dx.doi.org/10.1051/e3sconf/201911303021.

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Ocean Thermal Energy Conversion (OTEC) is a promising technology to provide sustainable and dispatchable energy supply to oceanic coastal areas and islands. It exploits the temperature difference between deep cold ocean water and warm tropical surface water in an Organic RankineCycle (ORC), guaranteeing a continuous and dispatchable electric production, overcoming one ofthe most critical issue of renewable generators such as PV or wind turbines. Despite the technological maturity of ORC application to OTEC systems, it still presents technical and economicbarriers mainly related to their econom

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Hayajneh, Hassan, and Xuewei Zhang. "Logistics Design for Mobile Battery Energy Storage Systems." Energies 13, no. 5 (2020): 1157. http://dx.doi.org/10.3390/en13051157.

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Currently, there are three major barriers toward a greener energy landscape in the future: (a) Curtailed grid integration of energy from renewable sources like wind and solar; (b) The low investment attractiveness of large-scale battery energy storage systems; and, (c) Constraints from the existing electric infrastructure on the development of charging station networks to meet the increasing electrical transportation demands. A new conceptual design of mobile battery energy storage systems has been proposed in recent studies to reduce the curtailment of renewable energy while limiting the publ

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Vargas, J. V. C. "EDITORIAL." Revista de Engenharia Térmica 16, no. 1 (2017): 02. http://dx.doi.org/10.5380/reterm.v16i1.62182.

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The editorial of Engenharia Térmica of this issue continues the discussion on scientific research needs in vital areas in which thermal engineering has important participation. The main goal is to motivate the readers, within their specialties, to identify possible subjects for their future research.Global energy demands are on the rise, and the current technology used to generate, transmit, and distribute electricity will not be able to meet the growth due to the bottlenecks in densely populated areas and the inefficiencies throughout the electrical grid. Soon, new technologies will be requir

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Stankiewicz, Jacek Maciej, and Agnieszka Choroszucho. "Comparison of the Efficiency and Load Power in Periodic Wireless Power Transfer Systems with Circular and Square Planar Coils." Energies 14, no. 16 (2021): 4975. http://dx.doi.org/10.3390/en14164975.

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In the article, a wireless charging system with the use of periodically arranged planar coils is presented. The efficiency of two wireless power transfer (WPT) systems with different types of inductors, i.e., circular and square planar coils is compared, and two models are proposed: analytical and numerical. With the appropriate selection of a load resistance, it is possible to obtain either the maximum efficiency or the maximum power of a receiver. Therefore, the system is analyzed at two optimum modes of operation: with the maximum possible efficiency and with the highest power transmitted t

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Bueno-López, Maximiliano, and Johinner Mauricio Sanabria Villamizar. "A Comparative Study of Signal Analysis Methods Applied in the Detection of Instantaneous Frequency." Transactions on Energy Systems and Engineering Applications 1, no. 1 (2020): 1–11. http://dx.doi.org/10.32397/tesea.vol1.n1.1.

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The smart grid concept is being applied more and more frequently and this is due to the need to integrate all the components that are part of power systems today, starting from generation units, storage systems, communications and connected loads. Non-linear and non-stationary signals have been obtained in this type of systems, which have high penetration of non-conventional energy sources (NCSRE) and non-linear loads. The power quality criterion has had to be adapted to the new conditions of the electrical systems and this has led to the need to search for new analysis methodologies for the a

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Januszewski, Radosław, Rafał Różycki, and Grzegorz Waligóra. "Improving energy efficiency of supercomputer systems through software-aided liquid cooling management." Foundations of Computing and Decision Sciences 43, no. 2 (2018): 89–103. http://dx.doi.org/10.1515/fcds-2018-0007.

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Abstract Many fields of modern science rely more and more on the immense computing power of supercomputers. Modern, multi-thousand node systems can consume megawatts of electrical energy in highly uneven manner, challenging the data center infrastructure, both power and cooling coils. The traditional way of managing the infrastructure makes each subsystem of a data center (e.g. cooling) independent from all other in the way it relies only on local sensors to manage the infrastructure. The erratic nature of computing in a large data center makes this approach suboptimal. In the paper we show th

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Turner, Matthew J. "Design and development of a smart grid laboratory for an energy and power engineering technology program." International Journal of Electrical Engineering & Education 54, no. 4 (2017): 299–318. http://dx.doi.org/10.1177/0020720916687315.

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This paper presents the design and development of a laboratory facility to accompany a three-course power systems sequence in the Energy and Power Engineering Technology program at Purdue University. This hardware-based system is modeled after the US electric grid and emulates a complete power network: generation, transmission and distribution, end-use, and control. The approach taken is to divide the lab hardware in two: a simplified three-phase, three-bus system for power transfer from a synchronous generator and infinite bus to a variable load, and a multi-bus single phase system with prime

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Li, Qi, Fang-Zhou Yao, Yang Liu, Guangzu Zhang, Hong Wang, and Qing Wang. "High-Temperature Dielectric Materials for Electrical Energy Storage." Annual Review of Materials Research 48, no. 1 (2018): 219–43. http://dx.doi.org/10.1146/annurev-matsci-070317-124435.

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The demand for high-temperature dielectric materials arises from numerous emerging applications such as electric vehicles, wind generators, solar converters, aerospace power conditioning, and downhole oil and gas explorations, in which the power systems and electronic devices have to operate at elevated temperatures. This article presents an overview of recent progress in the field of nanostructured dielectric materials targeted for high-temperature capacitive energy storage applications. Polymers, polymer nanocomposites, and bulk ceramics and thin films are the focus of the materials reviewed

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Escobar Mejía, Andrés, Valentina Triviño Castañeda, and Mauricio Holguin Londoño. "A Power Sharing Methodology Considering Wavelet Transform in a Residential Prosumer with a Hybrid Storage System." Scientia et Technica 25, no. 1 (2020): 23–29. http://dx.doi.org/10.22517/23447214.22891.

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Power systems have faced significant changes in recent years due to the integration of renewable energies in the power grid. Thanks to its multiple advantages, the so-called clean energies play an important role in the development of the electrical system, allowing the active participation of end users in energy markets. However, the intermittent nature of these sources has delayed their full integration into power systems; unless operated in conjunction with energy storage systems (e.g. batteries, ultracapacitors, etc.) to smooth out the generation and match the demand. This article presents

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