Готові списки джерел за темами / Power system operating modes

Добірка наукової літератури з теми "Power system operating modes"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Power system operating modes"

1

Bolbot, Victor, Gerasimos Theotokatos, Rainer Hamann, George Psarros, and Evangelos Boulougouris. "Dynamic Blackout Probability Monitoring System for Cruise Ship Power Plants." Energies 14, no. 20 (October 13, 2021): 6598. http://dx.doi.org/10.3390/en14206598.

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Анотація:
Stringent environmental regulations and efforts to improve the shipping operations sustainability have resulted in designing and employing more complex configurations for the ship power plants systems and the implementation of digitalised functionalities. Due to these systems complexity, critical situations arising from the components and subsystem failures, which may lead to accidents, require timely detection and mitigation. This study aims at enhancing the safety of ship complex systems and their operation by developing the concept of an integrated monitoring safety system that employs existing safety models and data fusion from shipboard sensors. Detailed Fault Trees that model the blackout top event, representing the sailing modes of a cruise ship and the operating modes of its plant, are employed. Shipboard sensors’ measurements acquired by the cruise ship alarm and monitoring system are integrated with these Fault Trees to account for the acquired shipboard information on the investigated power plant configuration and its components operating conditions, thus, facilitating the estimation of the blackout probability time variation as well as the dynamic criticality assessment of the power plant components. The proposed concept is verified by using a virtual simulation environment developed in Matlab/Simulink. This study supports the dynamic assessment of the ship power plants and therefore benefits the decision-making for enhancing the plant safety during operations.
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2

Bolbot, Victor, Gerasimos Theotokatos, Rainer Hamann, George Psarros, and Evangelos Boulougouris. "Dynamic Blackout Probability Monitoring System for Cruise Ship Power Plants." Energies 14, no. 20 (October 13, 2021): 6598. http://dx.doi.org/10.3390/en14206598.

Повний текст джерела
Анотація:
Stringent environmental regulations and efforts to improve the shipping operations sustainability have resulted in designing and employing more complex configurations for the ship power plants systems and the implementation of digitalised functionalities. Due to these systems complexity, critical situations arising from the components and subsystem failures, which may lead to accidents, require timely detection and mitigation. This study aims at enhancing the safety of ship complex systems and their operation by developing the concept of an integrated monitoring safety system that employs existing safety models and data fusion from shipboard sensors. Detailed Fault Trees that model the blackout top event, representing the sailing modes of a cruise ship and the operating modes of its plant, are employed. Shipboard sensors’ measurements acquired by the cruise ship alarm and monitoring system are integrated with these Fault Trees to account for the acquired shipboard information on the investigated power plant configuration and its components operating conditions, thus, facilitating the estimation of the blackout probability time variation as well as the dynamic criticality assessment of the power plant components. The proposed concept is verified by using a virtual simulation environment developed in Matlab/Simulink. This study supports the dynamic assessment of the ship power plants and therefore benefits the decision-making for enhancing the plant safety during operations.
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3

Abdali, L. M., H. J. Mohammed, B. A. Yakimovich, V. V. Kuvshinov, N. V. Korovkin, and D. F. Bordan. "Modeling the Operating Modes of a Photovoltaic System." Vestnik IzhGTU imeni M.T. Kalashnikova 24, no. 3 (2021): 78–87. http://dx.doi.org/10.22213/2413-1172-2021-3-78-87.

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Анотація:
During the operation of photovoltaic installations, the inconstancy of the energy characteristics of the flow of incident solar radiation adversely affects the generation of electrical energy. Consumers are highly dependent on climatic factors and solar insolation. For more efficient operation of generating solar installations, it is necessary to conduct detailed studies of the characteristics of the auxiliary and control equipment of the photovoltaic system. When using mathematical programs to simulate the operating modes of solar power generating systems, it is possible to significantly improve the operating parameters of control units and auxiliary systems and increase the generation of electrical energy. The paper presents an improved electrical diagram of a photovoltaic generating system, its control elements, and the efficiency of energy generation is increased. It also describes a method for modeling the operating modes of photovoltaic (PV) modules, implemented in the Matlab/Simulink program. In the work, it was necessary to define a circuit simulation model for the solar array to ensure interaction with the power converter. The characteristics of the solar cells, which are influenced by irradiation and temperature, are modeled by a circuit model. A simplified equivalent circuit for a diode equivalent PV system is used as a model. The simulation results are compared with different types of PV module data. As a result of the work, it was shown that the created simulation blocks in the Matlab/Simulin system well simulate the operation of solar panels, while they are compatible with different types of photovoltaic modules and are convenient in providing various operating modes. In the study of real operating modes of the proposed generating system, the possibility of increasing the generation of electrical energy was shown. When using the proposed circuit solutions for the operation of solar installations, it is possible to significantly increase their efficiency, extend the trouble-free operation, and increase the service life of the equipment. The conducted research contributes to a better use of blocks of photovoltaic systems used to provide electrical energy to industrial, municipal and individual consumers. The circuit solutions proposed in the work are possible for use both at large solar power plants operating in parallel with the general energy system, and at small photovoltaic installations used to provide individual consumers.
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4

Elistratov, V. V., and A. V. Vinogradova (Chernova). "Autonomous WPP/HPP power system operating modes study." International Journal of Hydrogen Energy 42, no. 17 (April 2017): 12355–63. http://dx.doi.org/10.1016/j.ijhydene.2017.03.211.

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5

Zhuravlev, I. M., and A. V. Osipov. "Resonant solar cell energy converter in the power supply system for small spacecraft." Proceedings of Tomsk State University of Control Systems and Radioelectronics 23, no. 3 (September 25, 2020): 81–85. http://dx.doi.org/10.21293/1818-0442-2020-23-3-81-85.

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Анотація:
The operation of a solar cell resonant converter at operating modes in the power supply system of a small spacecraft is investigated. The resonant converter with pulse-code regulation simulation model has been developed, and the operation point by stabilizing charge current mode and stabilizing output voltage mode is considered. The converter regulating characteristics in various operating modes are obtained.
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6

Khayamy, Mehdy, and Olorunfemi Ojo. "A Power Regulation and Droop Mode Control Method for a Stand-Alone Load Fed from a PV-Current Source Inverter." International Journal of Emerging Electric Power Systems 16, no. 2 (April 1, 2015): 83–91. http://dx.doi.org/10.1515/ijeeps-2014-0159.

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Анотація:
Abstract A current source inverter fed from photovoltaic cells is proposed to power an autonomous load when operating under either power regulation or voltage and frequency drooping modes. Input–output linearization technique is applied to the overall nonlinear system to achieve a globally stable system under feasible operating conditions. After obtaining the steady-state model that demarcates the modes of operation, computer Simulation results for variations in irradiance and the load power of the controlled system are generated in which an acceptable dynamic response of the power generator system under the two modes of operation is observed.
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7

Savenko, A. E., and P. S. Savenko. "Supporting the operation of the electrical power system of modern special purpose vessels with dynamic positioning." Power engineering: research, equipment, technology 23, no. 6 (March 30, 2022): 99–108. http://dx.doi.org/10.30724/1998-9903-2021-23-6-99-108.

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Анотація:
THE PURPOSE. Consider the use of special purpose vessels with a dynamic positioning system. To conduct observations and research of the operation of electrical power systems of such vessels for the existence of problems in them that affect the performance of technological operations. To propose methods and means aimed at eliminating situations and processes that adversely affect the operation of shipboard electrical power systems when laying pipelines.METHODS. For observation and research, the unified electrical power systems with electric rudder propellers and a system for laying an underwater pipeline of the "Seven Vega" cable layer was considered. Collected information on all the main electrical systems of the vessel "Seven Vega". Experimental studies were carried out aimed at studying the operating modes of the electrical power system during the laying of pipelines.RESULTS. Experimental oscillograms of currents of parallel operating diesel-generator sets in different modes have been obtained. The existence of power exchange oscillations during the operation of the unified electric power system of the cable-laying ship “Seven Vega” is noted. The data on the negative influence of power oscillations on the operation of tensioners during the laying of underwater pipelines were obtained.CONCLUSION. The use of sea-going vessels with dynamic positioning for laying pipelines and performing oil and gas production operations requires ensuring the operation of their electrical power systems. To ensure the high-quality operation of tensioners in pipeline laying systems, it is necessary to ensure the adjustment of their regulators and to exclude the occurrence of power exchange oscillations during parallel operation of generator sets.
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8

Elistratov, V. V., and A. V. Vinogradova (Chernova). "SIMULATION OF WPP/HPP POWER SYSTEM OPERATING MODES IN DECENTRALIZED POWER SUPPLY SYSTEM." Alternative Energy and Ecology (ISJAEE), no. 9-10 (June 14, 2016): 12–24. http://dx.doi.org/10.15518/isjaee.2016.09-10.012-024.

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9

Denysiuk, S. P., P. V. Makhlin, O. A. Shram, and V. M. Slynko. "FEATURES OF OPERATING MODES ANALYSIS OF THE POWER SYSTEM IN AREAS WITH ALTERNATIVE ELECTRIC POWER SOURCES (WIND POWER PLANTS)." Tekhnichna Elektrodynamika 2022, no. 1 (January 24, 2022): 41–49. http://dx.doi.org/10.15407/techned2022.01.041.

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Анотація:
High growth of renewable energy sources in the energy system necessitate of balancing their variable power. The integration of the interconnected power grid of Ukraine into the pan-European energy system ENTSO-E provides for solution to the issue of increasing the flexibility of the Ukraine power grid and ensuring the stability of its operating modes. It is shown that the problem of ensuring the stability of operating modes of power systems is growed by the integration of powerful wind farms in power systems. In particular, issues of stability are becoming relevant for both the powerful renewable energy sources themselves and their impact on the stability of existing power plants operating in a compatible manner with these sources at the regional level. The simulations of electromechanical transients and the study of the power grid operating mode when the operation of the wind power plant changes has been carried out in the article. The issues of ensuring the oscillatory stability of the power system at the regional level and ensuring the reliability of power supply in an extreme case - with a sudden shutdown of the wind power plant are considered. The change in power in the main transmission lines and its reverse, the dependence of the voltage in the network, the angles of the rotors of the generators of the nearest power plants and their slippage are investigated in the work. References 14, figures 4, tables 3.
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10

XIONG, XIAOLING, CHI K. TSE, and XINBO RUAN. "SMOOTH AND NONSMOOTH BIFURCATIONS IN MULTI-STRUCTURE MULTI-OPERATING-MODE HYBRID POWER SYSTEMS." International Journal of Bifurcation and Chaos 23, no. 05 (May 2013): 1350094. http://dx.doi.org/10.1142/s0218127413500946.

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Анотація:
Hybrid renewable power generation systems have been developed rapidly in recent years. Due to the inherent fluctuation of availability of energy from renewable sources, systems that are designed to capture energy from such sources and deliver it in loads have to cope with the difficult challenges of maintaining stability under all possible operating conditions. As a result, the structures and operating modes of such hybrid systems are inherently time-varying. Due to their multiple structures and operating-modes, hybrid systems have rather complex dynamic behavior and the design for stable operation requires thorough consideration of the effects of variation in parameters on the operating modes and corresponding stability statuses. This paper presents a formal system description for such systems and a general procedure for analyzing the change of dynamical behavior under parameter variations (i.e. bifurcation) of this kind of systems. A hybrid power system consisting of dual-input buck converters is taken as an example for illustrating the possible complex behavior. We reveal smooth and nonsmooth bifurcation phenomena in this system. Under certain conditions, nonsmooth bifurcations have been observed and verified with full-circuit simulations. Moreover, a detailed analysis based on an averaged model is performed to identify two specific types of bifurcation and evaluate the stability boundaries of the system.
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Більше джерел

Дисертації з теми "Power system operating modes"

1

Nguyen, Van Liem. "Modeling and control coordination of power systems with FACTS devices in steady-state operating mode." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2009.0036.

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Анотація:
This thesis is devoted to the development of new models for a recently-implemented FACTS (flexible alternating current transmission system) device, the unified power flow controller (UPFC), and the control coordination of power systems with FACTS devices in steady-state operating mode. The key objectives of the research reported in the thesis are, through online control coordination based on the models of power systems having FACTS devices, those of maximising the network operational benefit and restoring system static security following a disturbance or contingency. Based on the novel concept of interpreting the updated voltage solutions at each iteration in the Newton-Raphson (NR) power-flow analysis as dynamic variables, the thesis first develops a procedure for representing the unified power flow controllers (UPFCs) in the steady-state evaluation. Both the shunt converter and series converter control systems of a UPFC are modeled in their dynamical form with the discrete time variable replaced by the NR iterative step in the power-flow analysis. The key advantage of the model developed is that of facilitating the process of UPFC constraint resolution during the NR solution sequence. Any relative priority in control functions pre-set in the UPFC controllers is automatically represented in the power-flow formulation. Although the developed UPFC model based on the dynamic simulation of series and shunt converter controllers is flexible and general, the number of NR iterations required for convergence can be large. Therefore, the model is suitable mainly for power system planning and design studies. For online control coordination, the thesis develops the second UPFC model based on nodal voltages. The model retains all of the flexibility and generality of the dynamic simulation-based approach while the number of iterations required for solution convergence is independent of the UPFC controller dynamic responses. Drawing on the constrained optimisation based on Newton’s method together with the new UPFC model expressed in terms of nodal voltages, a systematic and general method for determining optimal reference inputs to UPFCs in steady-state operation is developed. The method is directly applicable to UPFCs operation with a high-level line optimisation control (LOC) for maximising the network operational benefit. By using a new continuation technique with adaptive parameter, the algorithm for solving the constrained optimisation problem extends substantially the region of convergence achieved with the conventional Newton’s method. Having established the foundation provided by the comprehensive models developed for representing power systems with FACTS devices including the UPFC, the research, in the second part, focuses on real-time control coordination of power system controllers, with the main purpose of restoring power system static security following a disturbance or contingency. At present, as the cost of phasor measurement units (PMUs) and wide-area communication network is on the decrease, the research proposes and develops a new secondary voltage control where voltages at all of the load nodes are directly controlled, using measured voltages.
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2

Bai, Wenshuai. "DC Microgrid optimized energy management and real-time control of power systems for grid-connected and off-grid operating modes." Thesis, Compiègne, 2021. http://www.theses.fr/2021COMP2586.

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Анотація:
Le travail de recherche de cette thèse se concentre sur l’élaboration de deux modes de fonctionnement du microréseau à savoir : mode connecté au réseau, mode hors réseau comprenant les modes îloté et isolé. Le problème de la défaillance du réseau en mode connecté au réseau et la faible fiabilité de l'alimentation électrique en mode hors réseau doivent être résolues. Ainsi, le but de cette thèse est de proposer un microréseau DC combinant à la fois les avantages du mode connecté au réseau et ceux du mode isolé. On obtient ainsi un microréseau DC qu’on peut qualifier de complet. Le microréseau DC complet contient les sources d'énergie renouvelables, le stockage et le réseau public, et les sources de secours sont utilisées pour réduire le délestage. Dans ce microréseau DC, un système de supervision est proposé dans le but de gérer le flux des puissances. La gestion de la puissance en temps réel dans la couche opérationnelle du système de supervision permet de maintenir l'équilibre de puissance. Dans la couche d'optimisation du système de supervision, l'optimisation journalière est proposée afin de minimiser le coût d'exploitation global. Les résultats de la simulation montrent que le microréseau DC complet peut minimiser les coûts d'exploitation. Ensuite, le système de supervision prend en compte l'efficacité dynamique du convertisseur pour résoudre le problème lié à la qualité de la puissance du microréseau qui peut être dégradée à cause de la tension instable du bus DC. Les résultats de la simulation montrent que la prise en compte de l'efficacité dynamique du convertisseur dans la couche opérationnelle du système de supervision permet de réduire les fluctuations de la tension du bus DC. En ce qui concerne l'importance de la prédiction PV pour l'optimisation de la veille, deux modèles de prédiction sont étudiés et comparés pour donner une puissance de prédiction PV précise. Les résultats montrent que les deux modèles ont presque les mêmes résultats
This thesis focus on the research of the DC microgrid following two operation models: grid-connected mode, and off-grid mode including the islanded and isolated modes. The aim of this thesis is to propose a DC microgrid combining the advantages of the grid-connected or the off-grid mode, which named full DC microgrid. ln the full DC microgrid, the renewable energy sources, storage, and public grid are included, and the back-up sources also applied to reduce the load shedding. ln the full DC microgrid, a supervisory system is proposed to manage the power. The real-time power management in the operational layer of the supervisory system can keep the power balance. ln the optimization layer of the supervisory system, the day-ahead optimization is proposed to achieve the global minimal operation cost. The simulation results show that the full DC microgrid combines both advantages of the grid-connected and the off-grid mode to minimize the operating cost. Then, the supervisory system considers the dynamic efficiency of the converter to solve the problem that the power quality of the microgrid is degraded due to the unstable DC bus voltage caused by the inaccurate power control. The simulation results show that considering the dynamic efficiency of the converter in the operational layer of the supervisory system, the fluctuation of the DC bus voltage can be reduced. Regarding the importance of the PV prediction for the day-ahead optimization, two prediction modes are studied and compared to give a robust PV prediction power. The results are that the two models almost have the same results
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3

Гречин, Юрій Олегович. "Модернізація та адаптація розрахункової моделі УРМЕС-2М для моделювання і розрахунків режимів електричних мереж". Master's thesis, Київ, 2018. https://ela.kpi.ua/handle/123456789/25636.

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Анотація:
Магістерська дисертація складається з пояснювальної записки та графічного матеріалу. Пояснювальна записка містить у собі 188 сторінках машинописного тексту формату А4, містить 94 рисунків та 24 таблиць, 20 джерел використаної літератури. Графічна частина складається з 9 аркушів технічних креслень у форматі А1. В дисертації розглянуто і запропоновано варіант удосконалення універсального лабораторного стенду УРМЕС-2М, розроблено та проведено цикл лабораторних робіт за допомогою програмного комплексу Matlab та проведено моделювання монтажної плати електронно-цифрового генератора, розроблено стартап-проект, розглянуто та пораховано релейний захист шунтувального реактору, розглянуто питання охорони праці при використанні лабораторного стенду.
The master's dіssertatіon consіsts of an explanatory note and graphіc materіal. The explanatory note contaіns 188 pages of typewrіtten A4 text, contaіns 94 fіgures and 24 tables, 20 sources of used lіterature. Graphіc part consіsts of 9 pіeces of technіcal drawіngs іn the format A1. Іn the dіssertatіon the varіant of perfectіon of the unіversal laboratory stand URMES-2M was consіdered and proposed, the cycle of laboratory works was developed and conducted wіth the help of the Matlab software package and the sіmulatіon of the electronіc-dіgіtal generator cіrcuіt board was carrіed out, a startup project has been developed, a relay protection for the shunt reactor has been considered and taken into account, the issues of labor protection with the use of a laboratory stand are considered.
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4

Welsch, Manuel. "Enhancing the Treatment of Systems Integration in Long-term Energy Models." Doctoral thesis, KTH, Energisystemanalys, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134100.

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Анотація:
Securing access to affordable energy services is of central importance to our societies. To do this sustainably, energy systems design should be – amongst other things – environmentally compliant and reconcile with the integrated management of potentially limiting resources. This work considers the role for so-called 'Smart Grids' to improve the delivery of energy services. It deals with the integration of renewable energy technologies to mitigate climate change. It further demonstrates an approach to harmonise potentially conflicting energy, water and land-use strategies. Each presents particular challenges to energy systems analysis. Computer aided models can help identify energy systems that most effectively meet the multiple demands placed on them. As models constitute a simple abstraction of reality, it is important to ensure that those dynamics that considerably impact results are suitably integrated. In its three parts, this thesis extends long-term energy system models to consider improved integration between: (A) supply and demand through Smart Grids; (B) timeframes by incorporating short-term operating constraints into long-term models; and (C) resource systems by linking multiple modelling tools. In Part A, the thesis explores the potential of Smart Grids to accelerate and improve electrification efforts in developing countries. Further, a long-term energy system model is enhanced to investigate the Smart Grid benefits associated with a closer integration of supply, storage and demand-side options. In Part B, the same model is extended to integrate flexibility requirements. The benefits of this integration are illustrated on an Irish case study on high levels of wind power penetrations. In Part C, an energy model is calibrated to consider climate change scenarios and linkages with land-use and water models. This serves to assess the implications of introducing biofuels on the small island developing state of Mauritius. The thesis demonstrates that too weak integration between models and resource systems can produce significantly diverging results. The system configurations derived may consequently generate different – and potentially erroneous – policy and investment insights.
Säker och prisvärd tillgång till energitjänster är en central fråga för dagens samhällen. För att tillgodose samhällen med hållbara energitjänster bör energisystemen designas för att – bland annat – möta de miljömässiga kraven samt hantera potentiellt begränsade resurser. Den här avhandlingen undersöker de ”smarta” elnätens roll för bättre tillhandahållande av energitjänster. Avhandlingen behandlar integration av förnybar energiteknik för minskad klimatpåverkan samt demonstrerar ett tillvägagångssätt för att förena potentiellt motstridiga energi-, vatten- och markanvändningsstrategier. Dessa uppvisar särskilda utmaningar i energisystemanalyser. Datorstödda modeller kan användas för att identifiera energisystem som på effektivast sätt möter samhällets krav. Datorstödda modeller är, per definition, förenklingar av verkligheten och det är därför viktigt att säkerställa en korrekt representation av det verkliga systemets dynamik. Den här avhandlingen förstärker energisystemmodeller för långsiktsprognoser utifrån tre aspekter: förbättra integrationen av (A) tillgång och efterfrågan genom smarta elnät; (B) olika tidsaspekter genom att inkludera kortsiktiga operativa begränsningar; samt (C) resurssystem genom att sammanlänka olika modelleringsverktyg. I del A utforskades de smarta elnätens potential för att förbättra elektriska system i utvecklingsländer. En befintlig energisystemmodell förstärktes för att behandla smarta elnät och kan därmed fånga fördelarna förknippade med energilagring och energianvändning. I del B utvidgades en energisystemmodell för långsiktsprognoser med flexibilitet för kortsiktiga operativa begränsningar. En fallstudie fokuserad på ett vindkraftsdominerat irländskt elnät genomfördes för att demonstrera fördelarna av modellutvecklingen. I del C kalibrerades en energisystemmodell för att ta klimatscenarier i beaktande samt energisystemets kopplingar till markanvändning och vattenresurssystem. En fallstudie fokuserad på Mauritius energisystem genomfördes för att undersöka konsekvenserna av en potentiell introducering av biobränslen. Avhandlingen demonstrerar att undermålig integration av energimodeller och resurssystem kan leda till avsevärda avvikelser i resultaten. Slutsatser som dras utifrån dessa resultat kan därmed leda till vitt skilda – och potentiellt felaktiga – underlag för investeringar och energipolitiska rekommendationer.

QC 20131118

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5

Heidari, Shayan. "Economic Modelling of Floating Offshore Wind Power : Calculation of Levelized Cost of Energy." Thesis, Mälardalens högskola, Industriell ekonomi och organisation, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36130.

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Анотація:
Floating offshore wind power is a relatively new technology that enables wind turbines to float above the sea level, tied by anchors at the seabed. The purpose of this work is to develop an economic model for the technology in order to calculate the total cost of a planned wind farm. Cost data are retrieved from reports and academic journals available online. Based on these data, a model in Microsoft Excel is developed which calculates the Levelized cost of energy (LCOE) for floating wind power plants as a function of several input values. As an addition to this model, financing offshore projects are described using literature study and by doing interviews with three major companies, currently investing in offshore wind. As a result, the model allows the user to calculate Capital expenditures, Operating expenditures and LCOE for projects at any given size and at any given site. The current LCOE for a large floating offshore wind farm is indicated to be in the range of 138-147 £/MWh. The outline from interviews was that today there is no shortage of capital for funding wind projects. However, in order to attract capital, the governmental regulatory of that market has to be suitable since it has a crucial impact on price risks of a project.
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6

Snowdon, David Computer Science &amp Engineering Faculty of Engineering UNSW. "Operating system directed power management." Awarded By:University of New South Wales. Computer Science & Engineering, 2010. http://handle.unsw.edu.au/1959.4/44747.

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Energy is a critical resource in all types of computing systems from servers, where energy costs dominate data centre expenses and carbon footprints, to embedded systems, where the system's battery life limits the device's functionality. In their efforts to reduce the energy use of these system's hardware manufacturers have implemented features which allow a reduced energy consumption under software control. This thesis shows that managing these settings is a more complex problem than previously considered. Where much (but not all) of the previous academic research investigates unrealistic scenarios, this thesis presents a solution to managing the power on varying hardware. Instead of making unrealistic assumptions, we extract a model from empirical data and characterise that model. Our models estimate the effect of different power management settings on the behaviour of the hardware platform, taking into account the workload, platform and environmental characteristics, but without any kind of a-priori knowledge of the specific workloads being run. These models encapsulate a system's knowledge of the platform. We also developed a \emph{generalised energy-delay} policy which allows us to quickly express the instantaneous importance of both performance and energy to the system. It allows us to select a power management strategy from a number of options. This thesis shows, by evaluation on a number of platforms, that our implementation, Koala, can accurately meet energy and performance goals. In some cases, our system saves 26\% of the system-level energy required for a task, while losing only 1\% performance. This is nearly 46\% of the dynamic energy. Taking advantage of all energy-saving opportunities requires detailed platform, workload and environmental information. Given this knowledge, we reach the exciting conclusion that near optimal power management is possible on real operating systems, with real platforms and real workloads.
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Mallangi, Siva Sai Reddy. "Low-Power Policies Based on DVFS for the MUSEIC v2 System-on-Chip." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229443.

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Multi functional health monitoring wearable devices are quite prominent these days. Usually these devices are battery-operated and consequently are limited by their battery life (from few hours to a few weeks depending on the application). Of late, it was realized that these devices, which are currently being operated at fixed voltage and frequency, are capable of operating at multiple voltages and frequencies. By switching these voltages and frequencies to lower values based upon power requirements, these devices can achieve tremendous benefits in the form of energy savings. Dynamic Voltage and Frequency Scaling (DVFS) techniques have proven to be handy in this situation for an efficient trade-off between energy and timely behavior. Within imec, wearable devices make use of the indigenously developed MUSEIC v2 (Multi Sensor Integrated circuit version 2.0). This system is optimized for efficient and accurate collection, processing, and transfer of data from multiple (health) sensors. MUSEIC v2 has limited means in controlling the voltage and frequency dynamically. In this thesis we explore how traditional DVFS techniques can be applied to the MUSEIC v2. Experiments were conducted to find out the optimum power modes to efficiently operate and also to scale up-down the supply voltage and frequency. Considering the overhead caused when switching voltage and frequency, transition analysis was also done. Real-time and non real-time benchmarks were implemented based on these techniques and their performance results were obtained and analyzed. In this process, several state of the art scheduling algorithms and scaling techniques were reviewed in identifying a suitable technique. Using our proposed scaling technique implementation, we have achieved 86.95% power reduction in average, in contrast to the conventional way of the MUSEIC v2 chip’s processor operating at a fixed voltage and frequency. Techniques that include light sleep and deep sleep mode were also studied and implemented, which tested the system’s capability in accommodating Dynamic Power Management (DPM) techniques that can achieve greater benefits. A novel approach for implementing the deep sleep mechanism was also proposed and found that it can obtain up to 71.54% power savings, when compared to a traditional way of executing deep sleep mode.
Nuförtiden så har multifunktionella bärbara hälsoenheter fått en betydande roll. Dessa enheter drivs vanligtvis av batterier och är därför begränsade av batteritiden (från ett par timmar till ett par veckor beroende på tillämpningen). På senaste tiden har det framkommit att dessa enheter som används vid en fast spänning och frekvens kan användas vid flera spänningar och frekvenser. Genom att byta till lägre spänning och frekvens på grund av effektbehov så kan enheterna få enorma fördelar när det kommer till energibesparing. Dynamisk skalning av spänning och frekvens-tekniker (såkallad Dynamic Voltage and Frequency Scaling, DVFS) har visat sig vara användbara i detta sammanhang för en effektiv avvägning mellan energi och beteende. Hos Imec så använder sig bärbara enheter av den internt utvecklade MUSEIC v2 (Multi Sensor Integrated circuit version 2.0). Systemet är optimerat för effektiv och korrekt insamling, bearbetning och överföring av data från flera (hälso) sensorer. MUSEIC v2 har begränsad möjlighet att styra spänningen och frekvensen dynamiskt. I detta examensarbete undersöker vi hur traditionella DVFS-tekniker kan appliceras på MUSEIC v2. Experiment utfördes för att ta reda på de optimala effektlägena och för att effektivt kunna styra och även skala upp matningsspänningen och frekvensen. Eftersom att ”overhead” skapades vid växling av spänning och frekvens gjordes också en övergångsanalys. Realtidsoch icke-realtidskalkyler genomfördes baserat på dessa tekniker och resultaten sammanställdes och analyserades. I denna process granskades flera toppmoderna schemaläggningsalgoritmer och skalningstekniker för att hitta en lämplig teknik. Genom att använda vår föreslagna skalningsteknikimplementering har vi uppnått 86,95% effektreduktion i jämförelse med det konventionella sättet att MUSEIC v2-chipets processor arbetar med en fast spänning och frekvens. Tekniker som inkluderar lätt sömn och djupt sömnläge studerades och implementerades, vilket testade systemets förmåga att tillgodose DPM-tekniker (Dynamic Power Management) som kan uppnå ännu större fördelar. En ny metod för att genomföra den djupa sömnmekanismen föreslogs också och enligt erhållna resultat så kan den ge upp till 71,54% lägre energiförbrukning jämfört med det traditionella sättet att implementera djupt sömnläge.
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8

Furrer, Travis C. (Travis Clay) 1976. "Power aware embedded operating system design." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86470.

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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
Includes bibliographical references (p. 73-74).
by Travis C. Furrer.
S.B.and M.Eng.
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9

Tverdal, Martin. "Operating system directed power reduction on EFM32." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11026.

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Power consumption has become a major concern of embedded systems.Currently FreeRTOS wastes a power waking up regularly to keep track of time.In this work FreeRTOS is modified to sleep when there is no work for the CPU to be done.Timekeeping while sleeping is done by a low frequency oscillator, consuming very little power.Drivers for peripherals have been developed, in order to optimise power consumption even more. Battery life time has been increased from 56 hours to 1867 hours for a simple self made benchmark.The goal is to get the changes into the official FreeRTOS distribution, but it has not been accepted yet.However, a customer of Energy Micro has started to develop an application based on this design.
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10

Whitlock, Rogers Jr. "Identification of Power System Stability Using Relevant Modes." ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/1384.

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The purpose of this investigation is to identify appropriate location of capacitor banks and sources of reactive power by studying power system stability in the vicinity of system equilibrium states. The locations for reactive power sources are determined by identifying those modes of the system that participate most in the system behavior in general and in dictating the final state of the system after experiencing faults or disturbances. To identify the relevant modes of the system that participate most in the system dynamic, we shall make use of modal and participation analysis for different system conditions. We also apply modal and participation analysis to a system in order to identify the components of greatest impact that result in the most efficient system control. The ideas developed in this study are used to analyze and identify weak boundaries of the IEEE 39- Bus system that contribute to the system’s instability.
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Книги з теми "Power system operating modes"

1

Zuev, Sergey, Ruslan Maleev, and Aleksandr Chernov. Energy efficiency of electrical equipment systems of autonomous objects. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1740252.

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When considering the main trends in the development of modern autonomous objects (aircraft, combat vehicles, motor vehicles, floating vehicles, agricultural machines, etc.) in recent decades, two key areas can be identified. The first direction is associated with the improvement of traditional designs of autonomous objects (AO) with an internal combustion engine (ICE) or a gas turbine engine (GTD). The second direction is connected with the creation of new types of joint-stock companies, namely electric joint-stock companies( EAO), joint-stock companies with combined power plants (AOKEU). The energy efficiency is largely determined by the power of the generator set and the battery, which is given to the electrical network in various driving modes. Most of the existing methods for calculating power supply systems use the average values of disturbing factors (generator speed, current of electric energy consumers, voltage in the on-board network) when choosing the characteristics of the generator set and the battery. At the same time, it is obvious that when operating a motor vehicle, these parameters change depending on the driving mode. Modern methods of selecting the main parameters and characteristics of the power supply system do not provide for modeling its interaction with the power unit start-up system of a motor vehicle in operation due to the lack of a systematic approach. The choice of a generator set and a battery, as well as the concept of the synthesis of the power supply system is a problem studied in the monograph. For all those interested in electrical engineering and electronics.
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2

Zhu, Jizhong. Optimization of power system operation. Piscataway, N.J: Wiley-IEEE, 2009.

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3

Waterhouse, Martin. MS-DOS power user's guide. San Francisco: Sybex, 1988.

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4

A, Soliman S., ed. Optimal long-term operation of electric power systems. New York: Plenum Press, 1988.

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5

Peek, Jerry D. UNIX Power Tools. Sebastopol, CA: O’Reilly & Associates, 1993.

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6

Peek, Jerry D. UNIX Power Tools. Sebastopol, CA: O’Reilly & Associates, 1993.

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7

Peek, Jerry D. UNIX Power Tools. Sebastopol, CA: UNIX power tools Associates, 1993.

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8

Tim, O'Reilly, and Loukides Michael Kosta, eds. UNIX Power Tools. 2nd ed. Sebastopol, CA: O’Reilly Associates, 1994.

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9

Tim, O'Reilly, and Loukides Michael Kosta, eds. UNIX Power Tools. Sebastopol, CA: O’Reilly Associates, 1994.

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10

Paszek, Stefan, Andrzej Boboń, Sebastian Berhausen, Łukasz Majka, Adrian Nocoń, and Piotr Pruski. Synchronous Generators and Excitation Systems Operating in a Power System. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37976-6.

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Частини книг з теми "Power system operating modes"

1

Gumhalter, Hans. "Operating Modes of an Alternating Current Power Supply System." In Power Supply in Telecommunications, 53–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-78403-3_4.

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Gumhalter, Hans. "Operating Modes of a Direct Current Power Supply System." In Power Supply in Telecommunications, 32–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-78403-3_3.

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3

Lubosny, Zbigniew. "Models of a WTGS Operating in a Power System." In Power Systems, 187–247. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-10944-1_6.

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4

Kuchanskyy, Vladislav, Denys Malakhatka, and Artur Zaporozhets. "Operating Modes Optimization of Bulk Electrical Power Networks: Structural and Parametrical Methods." In Power Systems Research and Operation, 99–119. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-82926-1_5.

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5

Upputuri, Ramanaiah, Shuvam Sahay, Shaik Riyaz, and Niranjan Kumar. "Analyzing the Effect of Control Modes Operation of Multiple Facts Controllers on System Performance." In Recent Advances in Power Electronics and Drives, 315–26. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8586-9_29.

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Kuchanskyy, Vladislav, and Volodymyr Tereshchuk. "Method of Regulating the Operating Modes of Main Electrical Systems in Terms of Voltage and Reactive Power." In Systems, Decision and Control in Energy III, 23–38. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-87675-3_2.

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7

Mishra, Y., S. Mishra, Fangxing Li, and Z. Y. Dong. "Eigenvalue Analysis of a DFIG Based Wind Power System under Different Modes of Operations." In Green Energy and Technology, 191–213. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13250-6_8.

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8

Abu-Siada, Ahmed, Mohammad A. S. Masoum, Yasser Alharbi, Farhad Shahnia, and A. M. Shiddiq Yunus. "Distribution Static Compensators and their Applications in Microgrids." In Recent Advances in Renewable Energy, 87–141. UAE: Bentham Science Publishers Ltd., 2017. http://dx.doi.org/10.2174/9781681085425117020005.

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Microgrids are clusters of distributed energy resources, energy storage systems and loads which are capable of operating in grid-connected as well as in offgrid modes. In the off-grid mode, the energy resources supply the demand while maintaining the voltage and frequency within acceptable limits whereas in the gridconnected mode, the energy resources supply the maximum or nominal power and the network voltage and frequency is maintained by the grid. This chapter first summarizes the structure and control principles of microgrids. It then briefly introduces the structures and control perspectives of distribution static compensators (DSTATCOMs). Finally, some applications of DSTATCOMs are discussed in microgrids. The introduced applications are power quality improvement due to the presence of nonlinear and unbalanced loads, voltage regulation and balancing, and interphase power circulation in the case of the presence of single-phase energy resources with unequal distribution amongst phases. Each application is illustrated by examples, realized in PSCAD/EMTDC.
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Elkhatiri, Ali, Naima Oumidou, Moussa Labbadi, Mouna Lhayani, and Mohamed Cherkaoui. "Magnetic Chargers in Electrical Models: Operating Principle and Efficiency Analysis of an Inductively Coupled Power Transfer System." In Digital Technologies and Applications, 1561–72. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73882-2_142.

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10

La Bella, Alessio. "Optimization-Based Control of Microgrids for Ancillary Services Provision and Islanded Operation." In Special Topics in Information Technology, 129–38. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-62476-7_12.

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AbstractThe ongoing environmental crisis is pushing the electrical sector towards a radical transformation, as the wide diffusion of renewable sources requires the power system to be more distributed, cooperative, and flexible, being each portion of the grid now able to produce and absorb power. This poses much more coordination challenges with respect to the traditional centralized system, largely sustained by fully controllable fossil-based power plants. In this context, microgrids, i.e. intelligent small-scale grids equipped with distributed energy resources and smart loads, are considered as the fundamental bricks of this future paradigm. This is due to the opportunity of coordinating co-located sources and loads, and to the microgrids extreme flexibility, as they can be operated either connected to the main grid or in islanded mode. The contribution of this doctoral research consists in the design of dedicated control architectures for ensuring the efficient and secure operation of microgrids in these two modes, characterized by different challenges and opportunities.
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Тези доповідей конференцій з теми "Power system operating modes"

1

Belsky, Aleksey A., and Dannil I. Ivanchenko. "Hybrid wind power unit operating modes simulation." In 2015 International Conference on Mechanical Engineering, Automation and Control Systems (MEACS). IEEE, 2015. http://dx.doi.org/10.1109/meacs.2015.7414888.

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Yi, Jianbo, Guozhou Zhang, Qi Huang, Yufei Teng, and Peng Zhang. "Multi-machine Power System Stabilizers Optimal Design Considering Multiple Operating Modes." In 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia). IEEE, 2019. http://dx.doi.org/10.1109/isgt-asia.2019.8881167.

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Binbin, Tian, Zhang Yanxia, and Yang Yang. "Analysis of zero-sequence protection affected by system operating modes." In 2012 2nd International Conference on Applied Robotics for the Power Industry (CARPI 2012). IEEE, 2012. http://dx.doi.org/10.1109/carpi.2012.6356300.

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Hanan, Muhammad, Waseem Yousaf, Xin Ai, Ehtisham Asghar, Muhammad Yaqoob Javed, and Salman Salman. "Multi-operating Modes Based Energy Management Strategy of Virtual Power Plant." In 2018 2nd IEEE Conference on Energy Internet and Energy System Integration (EI2). IEEE, 2018. http://dx.doi.org/10.1109/ei2.2018.8582406.

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Neshaastegaran, Peyman, and Hamid R. Karshenas. "Investigation of single-stage flyback inverter under different operating modes." In 2013 4th Power Electronics, Drive Systems & Technologies Conference (PEDSTC). IEEE, 2013. http://dx.doi.org/10.1109/pedstc.2013.6506720.

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6

Vacheva, Gergana, Rad Stanev, and Nikolay Hinov. "Physical model of an electric vehicle for research of dynamic operating modes." In 2017 15th International Conference on Electrical Machines, Drives and Power Systems (ELMA). IEEE, 2017. http://dx.doi.org/10.1109/elma.2017.7955403.

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7

ELISTRATOV, Viktor V., and Roman S. DENISOV. "Optimization of Hybrid Systems ’Operating Modes Based on Renewable Energy." In 2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA). IEEE, 2019. http://dx.doi.org/10.1109/elma.2019.8771684.

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Latha, K., B. Umamaheswari, N. Rajalakshmi, and K. S. Dhathathreyan. "Investigation of various operating modes of fuelcell/ultracapacitor/multiple converter based hybrid system." In 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS 2013). IEEE, 2013. http://dx.doi.org/10.1109/peds.2013.6526990.

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Bulatov, Yu N., A. V. Kryukov, and Nguyen Van Huan. "The Study of Power Router-Based DC Distribution Systems Operating Modes." In 2020 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon). IEEE, 2020. http://dx.doi.org/10.1109/fareastcon50210.2020.9271532.

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Matanov, Nikolay, and Snezhana Dimitrova. "Operating Modes Optimization of the Capacitor Banks in Electrical Power Systems." In 2018 10th Electrical Engineering Faculty Conference (BulEF). IEEE, 2018. http://dx.doi.org/10.1109/bulef.2018.8646938.

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Звіти організацій з теми "Power system operating modes"

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Gurieiev, Viktor, Yulii Kutsan, Anna Iatsyshyn, Andrii Iatsyshyn, Valeriia Kovach, Evgen Lysenko, Volodymyr Artemchuk, and Oleksandr Popov. Simulating Systems for Advanced Training and Professional Development of Energy Specialists in Power Sector. [б. в.], November 2020. http://dx.doi.org/10.31812/123456789/4456.

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The crisis of the system of professional development and personnel training in the energy sector exists not only in Ukraine but also all over the world. The article describes the concept of development and functioning of the industry system of personnel training in the energy sector of Ukraine. The importance of using modern web-oriented technologies to improve the skills of operational and dispatching personnel in the energy sector of Ukraine is substantiated. The meth- ods of distributed power system operating modes modelling are presented. De- velopment and software tools for the construction of distributed simulating sys- tems and particular features of cloud technologies application for the creation of a virtual training centers network in the energy sector, as well as the ways to automate the process of simulating scenarios development are described. The ex- perience of introducing remote training courses for energy specialists and remote web-based training simulators based on a comprehensive model of the energy system of Ukraine is presented. An important practical aspect of the research is the application of software and data support for the development of personnel key competencies in the energy sector for rapid recognition of accidents and, if necessary, accident management. This will allow them to acquire knowledge and practical skills to solve the problems of analysis, modelling, forecasting, and monitoring data visualization of large power systems operating modes.
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Soummane, Salaheddine, Amro Elshurafa, Hatem Al Atawi, and Frank Felder. Cross-seasonal Fuel Savings from Load Shifting in the Saudi Industrial Sector. King Abdullah Petroleum Studies and Research Center, April 2022. http://dx.doi.org/10.30573/ks--2022-dp01.

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Load shifting, that is, moving demand from peak to off-peak hours, is an important type of demand response. It can reduce the overall operating costs of a power system and improve the reliability of the power grid. This study estimates the financial implications of load shifting in the Saudi industrial sector. We use a national Saudi power system dispatch optimization model to simulate three scenarios. With this model, we quantify the impacts of shifting industrial loads from the peak summer to the off-peak winter months, keeping industrial electricity tariffs unchanged.
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Not Listed. Sustainable Forward Operating Base Nuclear Power Evaluation (Relationship Mapping System) Users? Manual. Office of Scientific and Technical Information (OSTI), January 2012. http://dx.doi.org/10.2172/1042365.

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Simmons, Justin. Complete and Exact Small Signal Analysis of DC-to-DC Switched Power Converters Under Various Operating Modes and Control Methods. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.195.

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Miller, M. H. Engineering development of a digital replacement protection system at an operating US PWR nuclear power plant: Installation and operational experiences. Office of Scientific and Technical Information (OSTI), April 1995. http://dx.doi.org/10.2172/90923.

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Muelaner, Jody. Unsettled Issues Regarding Power Options for Decarbonized Commercial Vehicles. SAE International, September 2021. http://dx.doi.org/10.4271/epr2021021.

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While direct electrification appears to provide the most cost-effective route to decarbonization of commercial vehicles, uptake may be constrained by critical metal supply. Additionally, it will be many years before hydrogen power becomes decarbonized or if it can ever compete economically with direct electrification. An electric road system (ERS) could offer a highly efficient and cost-effective route to direct electrification that would greatly reduce the volume of batteries required, but pilot schemes are urgently needed to provide concrete data on operating costs for different ERS technologies. Furthermore, if plug-in hybrid electric vehicles could obtain most of their power from an ERS, liquid biofuels and “electrofuels” may prove useful for occasional off-grid range extension. To achieve extremely long-range for operation in remote locations, liquid fuels remain the only viable option. Unsettled Issues Regarding Power Options for Decarbonized Commercial Vehicles discusses the analysis required to understand the lifecycle energy use for different power options for decarbonized commercial vehicles.
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Willits, Daniel H., Meir Teitel, Josef Tanny, Mary M. Peet, Shabtai Cohen, and Eli Matan. Comparing the performance of naturally ventilated and fan-ventilated greenhouses. United States Department of Agriculture, March 2006. http://dx.doi.org/10.32747/2006.7586542.bard.

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The objectives of this project were to predict the performance of naturally and fan-ventilated greenhouses as a function of climate, type of crop, evaporative cooling and greenhouse size, and to estimate the effects of the two cooling systems on yield, quality and disease development in the different crops under study. Background In the competitive field of greenhouse cultivation, growers and designers in both the US and Israel are repeatedly forced to choose between naturally ventilated (NV) and fan ventilated (FV) cooling systems as they expand their ranges in an effort to remain profitable. The known advantages and disadvantages of each system do not presently allow a clear decision. Whether essentially zero operating costs can offset the less dependable cooling of natural ventilation systems is question this report hopes to answer. Major Conclusions US It was concluded very early on that FV greenhouses without evaporative pad cooling are not competitive with NV greenhouses during hot weather. During the first year, the US team found that average air temperatures were always higher in the FV houses, compared to the NV houses, when evaporative pad cooling was not used, regardless of ventilation rate in the FV houses or the vent configuration in the NV houses. Canopy temperatures were also higher in the FV ventilated houses when three vents were used in the NV houses. A second major conclusion was that the US team found that low pressure fogging (4 atm) in NV houses does not completely offset the advantage of evaporative pad cooling in FV houses. High pressure fog (65 atm) is more effective, but considerably more expensive. Israel Experiments were done with roses in the years 2003-2005 and with tomatoes in 2005. Three modes of natural ventilation (roof, side and side + roof openings) were compared with a fan-ventilated (with evaporative cooling) house. It was shown that under common practice of fan ventilation, during summer, the ventilation rate is usually lower with NV than with FV. The microclimate under both NV and FV was not homogeneous. In both treatments there were strong gradients in temperature and humidity in the vertical direction. In addition, there were gradients that developed in horizontal planes in a direction parallel to the direction of the prevailing air velocity within the greenhouse. The gradients in the horizontal direction appear to be larger with FV than with NV. The ratio between sensible and latent heat fluxes (Bowen ratio) was found to be dependent considerably on whether NV or FV is applied. This ratio was generally negative in the naturally ventilated house (about -0.14) and positive in the fan ventilated one (about 0.19). Theoretical models based on Penman-Monteith equation were used to predict the interior air and crop temperatures and the transpiration rate with NV. Good agreement between the model and experimental results was obtained with regard to the air temperature and transpiration with side and side + roof ventilation. However, the agreement was poor with only roof ventilation. The yield (number of rose stems longer than 40 cm) was higher with FV
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8

Vehicle Surge Reduction Technology during Towing in Parallel HEV Pickup Truck. SAE International, March 2022. http://dx.doi.org/10.4271/2022-01-0613.

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This paper proposes a technology to reduce vehicle surge during towing that utilizes motors and shifting to help ensure comfort in a parallel HEV pickup truck. Hybridization is one way to reduce fuel consumption and help realize carbon neutrality. Parallel HEVs have advantages in the towing, hauling, and high-load operations often carried out by pickup trucks, compared to other HEV systems. Since the engine, motor, torque converter, and transmission are connected in series in a parallel HEV, vehicle surge may occur when the lockup clutch is engaged to enhance fuel efficiency, similar to conventional powertrains. Vehicle surge is a low-frequency vibration phenomenon. In general, the source is torque fluctuation caused by the engine and tires, with amplification provided by first-order torsional driveline resonance, power plant resonance, suspension resonance, and cabin resonance. This vibration is amplified more during towing. Therefore, this paper proposes two surge reduction technologies to help achieve fuel efficiency and surge at the same time during towing. One technology is a gear shift control that avoids engine operating zones where two or more resonance frequencies coincide, which is realized by changing the equivalent inertia via appropriate gear selection. The second technology is an anti-vibration control, which makes effective use of the hybrid system motors by adding motor torque to suppress the relative displacement between the driveline and the tires.
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