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Добірка наукової літератури з теми "Three-phase power supply system"

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

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Статті в журналах з теми "Three-phase power supply system"

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Singh, Shikha, Gurumoorthy Bhuvaneswari, and Bhim Singh. "Power Quality Improvement in Three-phase Telecommunication Power Supply System." Electric Power Components and Systems 43, no. 19 (October 9, 2015): 2105–15. http://dx.doi.org/10.1080/15325008.2015.1077486.

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2

Khan, M. Rizwan, Rashid Alammari, Shaikh Moinoddin, and Atif Iqbal. "Modelling and Analysis of a Three-Phase to Five-Phase Transformer." International Journal of Emerging Electric Power Systems 15, no. 4 (August 1, 2014): 401–10. http://dx.doi.org/10.1515/ijeeps-2012-0062.

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Анотація:
Abstract Multi-phase systems are the focus of research in recent times due to their inherent advantages compared to the three-phase counterpart. A lot of research effort has been put to develop commercially feasible multi-phase drive systems. There is a necessity to develop a static phase transformation system to obtain multi-phase supply from available three-phase grid. This paper presents an extension of a novel transformer connection scheme to convert three-phase supply to five-phase fixed voltage and fixed frequency supply already published. The various simulation and experimental results are reported in this paper to prove the viability of system.
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3

Ivanov, V. B. "Modeling of three-phase inverter power supply system in Simulink." IOP Conference Series: Materials Science and Engineering 1032 (January 21, 2021): 012054. http://dx.doi.org/10.1088/1757-899x/1032/1/012054.

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4

Artemenko, M. Yu, V. V. Chopyk, V. M. Mikhalsky, I. A. Shapoval, and S. Y. Polishchuk. "IDENTIFICATION OF THE POWER OF THE IMBALANCE OF THE THREE-PHASE FOUR-WIRE POWER SUPPLY SYSTEM FOR THE NEEDS OF ITS DISTRIBUTED COMPENSATION." Tekhnichna Elektrodynamika 2022, no. 2 (March 19, 2022): 12–20. http://dx.doi.org/10.15407/techned2022.02.012.

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The idea of distributed active filtration is to compensate for the currents of higher harmonics and undesirable components of the power of the main network with inverters of renewable energy converters of the connected microgrid, which have reserves of apparent power. For the convenience of distributed compensation, it is proposed to identify the sinusoidal mode of the three-phase four-wire power system, provided that the symmetric source is six mutually orthogonal components of the three-coordinate vector of line currents. The power of imbalance is shown to be due to four mutually orthogonal components of the three-coordinate vector of line currents with defined reference voltage vectors, each of which is proportional to a separate orthogonal component of the power of imbalance. Integral formulas for determining the scalar values of the four specified orthogonal components of imbalance powers have been obtained, which open the possibility of accounting for their contribution to the deterioration of the quality of electrical energy and the synthesis of control signals for active distributed filtration. The connection between the four specified orthogonal components of the power of imbalance and the parameters of the linear unbalanced load was established, which made it possible to verify these integral formulas using a computer experiment. It is analytically established and experimentally confirmed that the squares of the two orthogonal components of the imbalance powers associated with the current of the neutral wire are included in the decomposition of the square of apparent power and power losses with the multiplier, depending on the ratio of the resistances of the transmission line of the three-phase four-wire power system. References 17, figures 3.
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Chaban, Andriy, Marek Lis, Andrzej Szafraniec, and Vitaliy Levoniuk. "Mathematical Modelling of Transient Processes in a Three Phase Electric Power System for a Single Phase Short-Circuit." Energies 15, no. 3 (February 3, 2022): 1126. http://dx.doi.org/10.3390/en15031126.

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Анотація:
Field approaches are employed to develop a mathematical model of a power network section. The facility consists of two electric power subsystems described with ordinary differential equations and presented as concentrated parameter systems connected with a three-phase power supply line, presented as a distributed parameter system. The model of the electric power line is described with partial differential equations. Mathematically, the supply line model is described utilizing a mixed problem with explicitly indefinite boundary conditions. All electromagnetic state equations of the integrated system are introduced in their matrix-vector forms. The equation of the three-phase long supply line is expressed untraditionally as a system of two first-order differential equations as a function of long line voltage. Since the power supply line is part of the integrated system that includes two subsystems, the boundary conditions at the line’s start and end are implicitly defined, avoiding the traditional application of the Dirichlet first-type boundary condition. An expanded system of ordinary differential equations that describe physical processes in both the supply and loading subsystems is used to calculate the boundary conditions. To this end, third-type boundary conditions, or Poincaré’s conditions, serve to describe the wave equation of the electric power line. Such an integrated model of an electric power system helps analyse transient processes across the supply line when the electric power system is switched on and is single-phase short-circuited at the final point of the electric power line. A comparison of computer simulation results with well-known software packages shows a convergence of approx. 96%.
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Hayashi, Yusuke, Toshifumi Ise, and Kiichiro Tsuji. "Unbundled Power Quality Supply System with Three-Phase Four-Wire ac System." IEEJ Transactions on Power and Energy 121, no. 12 (2001): 1777–87. http://dx.doi.org/10.1541/ieejpes1990.121.12_1777.

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7

Nor, N. M., N. S. Zemri, S. A. Daud, T. Ibrahim, and H. Daud. "Development of an Automated Three-Phase Distribution Box System." Indonesian Journal of Electrical Engineering and Computer Science 6, no. 2 (May 1, 2017): 233. http://dx.doi.org/10.11591/ijeecs.v6.i2.pp233-240.

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Анотація:
Most electrical appliances require continuous power supply. For domestic use, crucial appliances such as refrigerator, aquarium and alarm system highly depend upon the continuity of power supply. However, if they are left without electricity due to power outage or blackouts caused by internal or external disturbance, the discontinuity of power supply could be a critical issue to some involving party. Blackouts may be due to short circuit, fault or the overloading of electricity mains. During power outage, Residual Current Device (RCD) detects fault currents from live to the neutral wire within circuit and will trip to prevent shock. This circumstance can increase safety when a house is left unoccupied. Be that as it may, the power will remain switched off until manually reset by man. Thus, this paper presented a new concept of Three-Phase distribution box system in order to overcome tripping problem. This system will be able to identify and isolate the fault using measurement of current flow into each Miniature Circuit Breaker (MCB) of appliances and current flowing out from each of the load. The measured current value will be compared and the maximum allowable difference is 30mA. If the current difference exceeds the maximum limit then the fault MCB will be detected. Hence RCD will be automatically close the circuit after determining the fault location via the motor operation to make sure of power stability and evade any property loss.
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Sevostyanov, A. A. "METHOD FOR ANALYSIS OF POWER QUALITY IN THREE-PHASE INDUSTRIAL POWER SUPPLY SYSTEM." Интеллектуальная электротехника, no. 3 (2020): 4–15. http://dx.doi.org/10.46960/2658-6754_2020_3_4.

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9

Hayashi, Yuji, Hiromasa Motoyama, and Takaharu Takeshita. "Power Flow Control in Wireless Power Supply System Using Three-Phase to Single-Phase Matrix Converter." IEEJ Transactions on Industry Applications 139, no. 10 (October 1, 2019): 880–89. http://dx.doi.org/10.1541/ieejias.139.880.

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10

Cai, Hui, Hong Yan, Wei Min Chen, and Qing Li. "Design of a Balanced Three-Phase Power Supply Soft-Switching Based on Single-Phase Inverter Power." Applied Mechanics and Materials 263-266 (December 2012): 803–8. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.803.

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Анотація:
To eliminate the negative effects caused by three-phase unbalanced distribution, a novel soft-switching system based on single-phase inverter is proposed. The system achieves three-phase equilibrium distribution by adjusting the power supply of the electric equipments. This paper presents a track strategy named regulating frequency to promise no impulse current, which means regulating the output frequency of the inverter to make the output voltage of the inverter synchronize with the grid voltage. Firstly, make the output voltage of the inverter synchronize with the voltage of original access phase, then switch the electric equipment to the inverter. Secondly, make the output voltage of the inverter synchronize with the voltage of alternative access phase, then switch the electric equipment to the alternative access phase to accomplish the soft-switching. MATLAB software and experiment are used to carry out verification for this system. The result shows that the impulse current is practically zero when the electric equipments are switching. The system achieves soft-switching.
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Більше джерел

Дисертації з теми "Three-phase power supply system"

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Jacobs, D. M. (Danver Maxwill). "Voltage control of medium to high power three-phase inverter supply systems." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52608.

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Анотація:
Thesis (MScEng)--University of Stellenbosch, 2001.
ENGLISH ABSTRACT: In this thesis a new voltage control method is developed for a three-phase inverter supply system. The inverter supply system consist of a Permanent Magnet Generator, a three-phase rectifier, a three-phase inverter plus LC-filter and a three-phase transformer in series. This system supplies power to a network or to a stand-alone load. The main focus of this thesis is on the control aspects of the inverter and the LC-filter. Different voltage control systems are investigated and compared to each other. From these methods the proposed voltage control method is developed where only the output voltages are measured to establish good voltage control. All these voltage control methods are also simulated with a software package. The proposed voltage control method compares very well with other voltage control methods. The results that are obtained in the simulations are satisfactory. The proposed voltage control method is also implemented in an 8 kW laboratory scale model and, again, very good practical results are obtained. A TMS320F240 nsp controller is used to implement the proposed voltage control method. The controller compensates well for load steps, and these results compare well to an alternative voltage control method, which was also evaluated practically.
AFRIKAANSE OPSOMMING: In hierdie tesis IS 'n nuwe spanningsbeheermetode ontwikkel VIr 'n drie-fase wisselrigter kragtoevoerstelsel. Die wisselrigter kragtoevoerstelsel bestaan uit 'n Permanent Magneet Generator, 'n drie-fase gelykrigter, 'n drie-fase wisselrigter plus Le-filter, en 'n drie-fase transformator in serie. Hierdie stelsel voorsien krag aan 'n netwerk sowel as aan 'n alleenstaande las. Die hooffokus van hierdie tesis is op die beheeraspekte van die wisselrigter en Le-filter. Verskillende spanningsbeheermetodes is deeglik ondersoek en vergelyk met mekaar. Uit hierdie metodes is dan die voorgestelde beheermetode ontwikkel waar slegs die uittreespanning gemeet word om goeie spanningsbeheer te kan doen. Al hierdie spanningsbeheermetodes is dan gesimuleer met 'n sagteware pakket. Die voorgestelde spanningsbeheermetode vergelyk baie goed met die ander spanningsbeheermetodes. Die resultate verky in die simulasies is ook baie bevredigend. Die voorgestelde beheermetode is ook geïmplementeer op 'n 8 kW laboratorium skaalmodel en weereens is baie goeie praktiese resultate verky. 'n TMS320F240 DSP-beheerder is gebruik om die voorgestelde beheermetode mee te implementeer. Die beheerder kompenseer baie goed vir lastrappe en vergelyk ook goed met 'n ander spanningsbeheermetode wat prakties ge-evalueer is.
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2

Cheng, Limin. "A universal controller for a single-phase uninterruptible power supply system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ42361.pdf.

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Mesbahi, Abdessamad. "Deterministic and Stochastic Economic Modeling of Hybrid Power Supply System with Photovoltaic Generators." Master's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/42555.

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Анотація:
Relevance of research. Due to the rapid deployment of the non-dispatchable (intermittent) generation sources in the smart grid, such as integration of the photovoltaic power plants and wind turbines in the distribution systems; this caused a problem of the uncertainty increase of simulation results for decision-making for power supply systems, these uncertainties of power systems are getting more and more notice. At the same time, the classical power systems models cannot give accurate simulation results. Wherein; it became necessary to define new models to represent the specific parameters of power system. wherein; this research reveals to the benefits of using probabilistic mathematical approaches to define and calculate the specific economic parameters, as well as the technical parameters for power supply system with the integration renewable energy generators, which are characterising by randomness and uncertainty due to the high penetration to the renewables. Monte Carlo Method, and Point Estimation Method are used to handle the uncertainties of renewable energy resources. The standard functions to represent the stochastic parameters of the model are analyzed with the use of three-point estimation technique for the distribution functions of their probable values. A synthetic skewed probability density function was analytically constructed basing on the standard normal distribution, which is suitable for analytic representation of the predicted and/or statistical random sampling of the uncertain model parameters of energy system with renewables, and analytical expressions were obtained to compute the moments of proposed synthetic probability function. Relationship of work with scientific programs, plans, themes. is to demonstrate the possibility of describing the input parameters of the simulation Deterministic and Stochastic Modeling by probability Density Functions by the use of three-point approximation techniques and to obtain analytical expressions for the characteristics of such distributions, suitable for non-iterative (as opposed to Monte Carlo Method) probabilistic method applications, namely the Point Estimation Method. Purpose and tasks of the research. Increasing the simulation accuracy results for estimation economic and technical parameters characterising photovoltaic power plant based on based on the life cycle model; as well as development of different algorithms based on deterministic and stochastic modeling of power system with non-dispatchable sources and minimize the computation time. Object of research. Processes of determining the estimated technical and economic parameters characterising a photovoltaic power plant located in Ukraine basing on stochastic modeling. Subject of research. Use of the Monte Carlo Method and Point Estimation Method to estimate the various economic and technical information characteristic of alternative power plants in order to obtain accurate simulation results. Practical value of the results. Practical techniques of the three-point approximation are used to construct the probability density function of the model uncertain (stochastic) parameter, which dominantly influences the modeling result: an event occurrence probability, the result attainability, whatsoever. This technique is an effective tool for the practical evaluating of an uncertain value of a technological or economic factor of material and/or economic object, and widely used for overall Levelized Energy Cost (LCOE – LEC) which is directly or indirectly engaged into analytic representation of the power systel model. Usually, the model of a kind is designed to solve technical and/or economic problem by means of Deterministic and Stochastic Modeling. Scientific novelty of the obtained results is the development of algorithms and mathematical solutions using a probabilistic approach basing Point Estimation Method instead of Monte Carlo Melthod to obtain more accurate estimation simulation results, as well as to obtain computational results in less time for useful decision-making in alternative power plant projects.
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4

Loubser, Karl Albie. "An experimental study of an inherently-safe, natural circulating, flash-tube type system for a nuclear reactor steam supply concept." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96050.

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Анотація:
Thesis (MEng) -- Stellenbosch University, 2014.
ENGLISH ABSTRACT: This project investigates aspects of a novel inherently safe nuclear power steam supply system as safety is of paramount importance. The system envisaged has unique features namely: a) a two-phase flow flash-tube type natural circulating primary loop (also the secondary radioactive particle containment); b) a twophase flow thermosyphon heat pipe type heat exchanger secondary loop is used to transfer heat from the primary loop to the steam generators, thereby physically separating the two flow streams from one another; c) a natural convection air cooled condenser for the removal of the reactor’s residual heat; d) a unique core using TRISO type fuel (acting as the primary radioactive particle containment) with life of at least 8.9 years; e) a steel containment vessel acting as a tertiary radioactive product containment; f) a concrete containing structure with air vents to allow air to pass over the main steel containment vessel for cooling purposes in the case of an emergency, and for the removal of parasitic heat during operation. In particular the primary and secondary loops of the proposed system are investigated. This is done by design, construction and testing of a small scale experimental set-up of the primary and secondary loops as well as the development of theoretical models for the two loops. A literature survey focusing on nuclear technology, thermosyphon loops, natural circulating loop instabilities, heat pipes, and two-phase flow modelling is presented to give a brief overview of the technologies as well as tools used in the work undertaken. Observations of the inside flow behaviour of the primary loop experimental set-up were made possible by windows providing many insights into the inner workings, such as plume formation and geysering. The transient response of the secondary heat pipe loop start-up is also investigated. A thermal resistance theoretical model was developed for the secondary loop using heat transfer formulae from theory as well as experimentally semiempirical correlated formula. Different states of operation of the secondary loop were observed during testing with the theoretical model of the condensing regime correlating well, two-phase regime correlating acceptably and liquid regime correlating poorly to experimental results and thus were modelled using an experimentally determined overall heat transfer coefficient. The secondary loop model of the liquid regime is coupled with the primary loop theoretical model to predict the system’s performance. A homogeneous, one-dimensional, simple theoretical model for the primary loop was derived and computer simulated. The results did not compare well with experimental results for single phase flow and failed to capture the onset of two-phase flow. The assumptions of one dimensional model with a unidirectional flow, a hydrostatic pressure problem, a constant volumetric flow rate and the inability of the implementation of the code to handle expansion are noted as some of the flaws in the theoretical model. The following recommendations are made: a more advanced design of the pressuriser should be incorporated into the experiment; the secondary loop’s theoretical model should be characterised under a broader set of operating conditions; the computer program can be used as the basis for further research and implementation of alternative solution algorithms and models.
AFRIKKANSE OPSOMMING: Hierdie projek ondersoek aspekte van ’n ongewone, essensieel veilige kernkrag stoomtoevoer-stelsel, omdat veiligheid van kardinale belang is. Die stelsel wat voorgestel is, het unieke eienskappe, naamlik: a) ’n twee-fasevloei flits-buistipe natuurlik sirkulerende primêre lus (wat ook die sekondêre inperking van radioaktiewe materiaal bevat); b) ’n twee-fasevloei termo-heweleffek sekondêre lus hitte-pyp hitte-uitruiler word gebruik om die hitte vanaf die primêre lus oor te dra na die stoomkragopwekkers en daardeur word die twee strome se vloei fisies geskei van mekaar; c) ’n natuurlike konveksie lugverkoelde kondensor word gebruik vir die verwydering van die reaktors se oortollige hitte; d) ’n unieke kern gebruik TRISO-tipe brandstof (wat as die primêre inperking van radioaktiewe materiaal optree) met ’n lewe van minstens 8.9 jaar; e) ’n inperkingshouer van staal wat optree as ’n tersiêre radioaktiewe produkhouer; f) ’n betonstruktuur met lugventilasie om toe te laat dat lug oor die hoof staalhouer vloei vir verkoeling in ’n noodgeval, en vir die verwydering van parasitiese hitte tydens werking. Hoofsaaklik word die primêre en sekondêre lusse van die voorgestelde stelsel ondersoek. Dit word gedoen deur die ontwerp, konstruksie en die toets van ’n eksperimentele opstelling van die primêre en sekondêre lusse op klein skaal, sowel as die ontwikkeling van teoretiese modelle vir die twee lusse. ’n Literatuurstudie wat fokus op kerntegnologie, termo-heweleffeklusse, natuurlik sirkulerende lus instabiliteit, hitte-pype, en twee-fase vloeimodellering word aangebied om ’n kort oorsig te gee van die tegnologie, sowel as gereedskap gebruik in die werk wat onderneem is. Om die interne vloeigedrag van die primêre lus se eksperimentele opstelling waar te neem, word daar gebruik gemaak van vensters wat dien as ’n manier om die innerlike werking van die proses soos pluimvorming en die kook van die water in die warmwaterkolom te toon. Die oorgangsreaksie van die sekondêre hittepyplus aanvangs is ook ondersoek. ’n Teoretiese termiese weerstandmodel is ontwikkel vir die sekondêre lus met behulp van hitte-oordragformules waarvoor hitte-oordragteorie gebruik is, wat met eksperimentele semi-empiriese formules gekorreleer is. Verskillende toestande van die sekondêre lus se werking is waargeneem gedurende die toetse. Die teoretiese model het goed met die kondensasiestaat gekorreleer, terwyl by die twee-fasewerkswyse aanvaarbare korrellasies aangetref is en die uiteindelike vloeitoestand swakker gekorrelleer het met eksperimentele resultate en dus gemodelleer is met behulp van die NTU-effektiwiteitsmetode. Die sekondêre lusmodel van die vloeistoftoestand is gekoppel met die primêre lus teoretiese model om die werking van die stelsels te voorspel. ’n Homogene een-dimensionele eenvoudige teoretiese model van die primêre lus is afgelei en ’n rekenaar simulasie is uitgevoer. Die resultate vergelyk nie goed met die eksperimentele resultate vir enkelfasevloei en kon nie die aanvang van twee-fasevloei beskryf nie. Die aannemings van ’n een-dimensionele model met eenrigting vloei, ’n hidrostatiese druk probleem, ’n konstant volumetries vloeitempo en die onvermoë van die implementering van die kode om uitbreiding te hanteer is bekend as ’n paar van die foute in die teoretiese model. Die volgende aanbevelings word gemaak: ’n meer gevorderde ontwerp van drukreëlaar moet in die eksperiment ingesluit word; die sekondêre lus se teoretiese model moet gekenmerk word onder ’n wyer stel bedryfsomstandighede, en die rekenaar program kan gebruik word as die basis vir verdere navorsing en die implementering van alternatiewe algoritmes en modelle.
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Сиротин, Юрий Александрович. "Компенсация и учет реактивной мощности в электротехнических системах с несимметричными режимами". Thesis, НТУ "ХПИ", 2014. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21116.

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Анотація:
Диссертация на соискание ученой степени доктора технических наук по специальности 05.09.03 - электротехнические комплексы и системы. - Национальный технический университет "Харьковский политехнический институт". - Харьков, 2015. Диссертационная работа посвящена решению важной научно-технической проблемы создания обобщенной теории мощности (ТМ), единого комплексного подхода к компенсации и учету неактивных составляющих полной мощности (ПМ) для обеспечения оптимального режима потребления электрической энергии (ЭЭ) в точке подключения неидеальной нагрузки к сети с несимметричным напряжением. На основе теоретических исследований, использующих метод ортогонального разложения векторов мгновенных значений 3-фазного тока и напряжения, получена обобщенная векторная математическая модель (ВММ), которая классифицирует электроэнергетические режимы (ЭР) в 3-фазной схеме электроснабжения с помощью векторной мгновенной мощности (ММ). Сформулированы и обоснованы предложения политики повышения качества поставки и потребления электроэнергии в 3-фазной сети, сочетающие установку поставщиком в каждой точке подключения потребителя счетчика, измеряющего каждую ЭКТ, заключение публичного договора, в котором предусмотрена оплата каждой ЭКТ по своему тарифу, установки потребителем КУ, применение компенсации неактивных составляющих ПМ на каждом уровне для уменьшения групповых потерь в сетях поставщика. Предложенная политика позволит учесть разную степень влияния ЭКТ на качество электроэнергии и обеспечит потребителю выбор выгодного для него способа потребления электроэнергии, стимулирует установку КУ, а поставщику обеспечит надежную методологию повышения качества электроэнергии в рамках несимметрии нагрузки и напряжения.
Thesis for a Doctor’s degree in Engineering Sciences by specialty 05.09.03 - Electrical Engineering Complexes and Systems. - National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2015. The dissertation is devoted an important scientific and technical issues to improve the power quality of supply and consumption (SC) in three-phase networks through further development of die power theory, development of methods and ways of compensation, proposals for the accounting and payment of the inactive components of the apparent power (AP). A generalized mathematical model (GMM) of electric power processes (EPP) in a 3-phase SC scheme was developed. The model of 3-wire circuit is provided by a special (О-balanced) mode of the model 4-wire circuit The developed GMM classifies the SC modes using the vectorial instantaneous power (IP) and summarizes the class of models used in the theory of IP. For sinusoidal mode with asymmetric voltage the refines vectorial mathematical model (VMV) 3-phasors (complex rms vectors) was created. The analytical expressions for the integral characteristics of the classified modes are founded and their relationship with standard IP and vectorial IP are established. With asymmetrical voltage and asymmetrical loading a sinusoidal mode can be both unbalanced and pulsed. Each mode is represented by its power equation and the equivalent orthogonal decomposition of the 3-phase current Both decompositions are used to create the optimal mode of SC with a constant IP at asymmetrical voltage. The proposed compensator provides the non-puised energy supply with the highest possible power factor and with the same average (active) power as the initial current. Based on the evaluation and calculation of the power equation components of a unbalanced mode was developed a methodology for calculating the loss of the measuring selection. A methodology and technique of analytical calculation of additional losses on the passport data of the connected electrical equipment was proposed. Formulated and proved offers on differential measurement and payment of the energy components of AP will stimulate consumer sets the compensator, and provide a reliable methodology for improving the quality of SC (within unbalance loading and voltage).
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Beber, DG. "DSP controlled three phase to single phase uninterruptible power supply." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/5244.

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Includes bibliographical references.
With the increase in use of electronic equipment such as personal computers, network stations and AC drive conrollers, an increased "polution" of the AC mains has resulted in the form of unwanted harmonics generated by the switching currents associated with these devices. Combined with the problem of mains "pollution" is the problem of balancing a large number of single phase loads onto a three phase supply, such as in a large computer network. This has resulted in more frequent supply voltage failure, causing substantial data and financial loss and in the extreme case death due to hospital equipment not being powered. Thus the need for an uninterruptible power supply (UPS) which is capable of resolving these problems. Taking these considerations into account, a three to single phase converter topology was developed and tested, using a Texas Instruments TMS320F243 Digital Signal Processor (DSP) for control of the system. The topology is based on a technique that utilises minimal semiconductor devices whilst still allowing for sinusoidal current to be drawn from the mains supply.
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Danko, Donald. "Configurable Frequency and Voltage Three Phase Power Supply." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1559166225004371.

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8

Magozore, Caxton. "DSP phase angle controlled three phase to single phase uninterruptible power supply." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/5177.

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9

Uys, Jacobus Johannes. "Dynamic digital control schemes for three-phase UPS inverters." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52810.

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Thesis (MScEng)--University of Stellenbosch, 2002.
ENGLISH ABSTRACT: This thesis presents the design and implementation of a voltage controller for an Uninterruptible Power Supply (UPS) Inverter. The inverter is capable of producing a nearly sinusoidal output voltage waveform, thereby keeping the Total Harmonic Distortion (THD) to a minimum. Digital controllers introduce a time delay in the control law that causes system instability. Various control techniques, which includes Pade approximations and system augmentation, are investigated to eliminate the effect of the time delay. These controllers employ classical control as well as modem control techniques. The selection of the various control parameters is verified by mathematical equations. A load-disturbance compensation scheme, implementing feed-forward and gain scheduling, is also developed to improve voltage distortion when varying loads, such as non-linear loads, are connected to the system. It is shown that the constructed pulse-width modulated (PWM) control scheme can achieve fast dynamic response as well as a low THD.
AFRIKAANSE OPSOMMING: Hierdie verhandeling ondersoek die ontwerp en implementering van 'n spanningsbeheerder vir 'n ononderbroke kragtoevoer omsetter. Die stelsel produseer 'n uittree spannigsgolfvorm met 'n lae Totale Harmoniese Distorisie (THD). Digital beheerders veroorsaak 'n tydvertraging in die beheerwet wat stelsel onstabiliteit kan veroorsaak. Verskeie beheertegnieke wat gebaseer is op die Pade benaderings van die tydvertraging en stelsel aanpassings, is ondersoek. Hierdie beheerders maak gebruik van klassieke en moderne beheertegnieke. Die seleksie van die verskeie beheerderveranderlikes word gestaaf deur wiskundige vergelykings. Spannigsvervorming word tot 'n minimum beperk deur gebruik te maak van 'n lasveranderings-kompensasietegniek wat onderskeidelik vorentoe-voer en aanwins skedulering implementeer. Verder word daar bewys dat die pulswydte modulasie (PWM) beheerskema vinnige dinamiese gedrag asook 'n lae THD bewerkstellig.
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Karshenas, Hamid Reza. "Input/output harmonic free current link three-phase AC power supply." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ28287.pdf.

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Книги з теми "Three-phase power supply system"

1

K, Kokula Krishna Hari, ed. Power Quality and System Level Control at Three-Phase Bidirectional Converter Interfaced with Micro Grid Systems: ICIEMS 2014. India: Association of Scientists, Developers and Faculties, 2014.

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2

Office, General Accounting. Telecommunications: Initiatives taken by three states to promote increased access and investment : report to the Committee on Agriculture, Nutrition, and Forestry, U.S. Senate. Washington, D.C: The Office, 1996.

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3

Partnership, Water Reliability, ed. Facilities reliability program: Phase II : regional system overview. [San Francisco, Calif.?]: The Partnership, 2000.

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4

Tripathi, Ajay. Fast response three phase fixed frequency static power supply. 1995.

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5

Karshenas, Hamid Reza. Input/output harmonic free current link three-phase AC power supply. 1997.

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6

Pande, Manish. Three-phase voltage type AC to DC power supply with improved performance. 1998.

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7

Yartys, Volodymyr, Yuriy Solonin, and Ihor Zavaliy. HYDROGEN BASED ENERGY STORAGE: STATUS AND RECENT DEVELOPMENTS. Institute for Problems in Materials Science, 2021. http://dx.doi.org/10.15407/materials2021.

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The book presents the recent achievements in the use of renewable energy sources, chemical processes, biomaterials for the efficient production of hydrogen, its storage and use as a fuel in the FC-based power systems. Novel results were obtained within two research programs, namely, the NATO Science for Peace G5233 project “Portable Energy Supply” (2017-21) and the priority program of the NAS of Ukraine "Development of scientific principles of the production, storage and use of hydrogen in autonomous energy systems" (2019-21). The priority program was implemented by the leading institutes of the National Academy of Sciences of Ukraine and contained three focus areas: efficient materials and technologies for the production, storage and use of hydrogen. This includes the development of new functional materials for the fuel cells and the application of the latter in autonomous power supply systems. 4-years NATO's project was implemented by a consortium led by the Institute for Energy Technology (Coordinator; NATO country - Norway) together with the institutes from the NATO partner country – Ukraine – belonging to the NAS of Ukraine: Physico-Mechanical Institute, Institute for Problems of Materials Science and Institute of General and Inorganic Chemistry. The work included the studies of H2 generation by the hydrolysis of MgH2, Al and NaBH4, analysis of the mechanisms of these processes and selection of the most efficient catalyzers. The project successfully developed a system integrating hydrolysis process and a PEM fuel cell.
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Chávez, Karma R. The Differential Visions of Queer Migration Manifestos. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252038105.003.0002.

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This chapter analyzes three manifestos linking queer politics with migration politics written and distributed in 2006 and 2007, and another, which builds upon two of those manifestos, published in 2011. The manifestos represent coalitional moments in that they supply visions for queer, migrant, and queer migrant activism, rights, and justice that point toward coalition. The visions of coalition differ widely from the inclusionary perspective, and yet the visions are offered in concrete and possible terms. In contrast to the normative and the utopian, the authors of these manifestos develop and advance a different political vision, a “differential vision” of queer migration coalitional politics. A differential vision reflects an impure political orientation, whereby activists seek relationships to others who may take different approaches but who resist hegemonic power systems.
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Ad'Doweesh, Khaled E. A microprocessor based PWM inverter drive incorporating a three-phase induction motor: A power transistor inverter drive is designed in which the firing logic utilises a Motorola 68000 microprocessor system to construct regular sampled, pulse width modulated voltage wave forms. Bradford, 1986.

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Частини книг з теми "Three-phase power supply system"

1

Lao, Keng-Weng, Man-Chung Wong, and NingYi Dai. "Co-phase Traction Power Supply with Railway HPQC: Modeling, Control, and Advantages Over System with RPC." In Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 37–64. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_2.

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2

Darnet, Matthieu, Emmanuel Godoy, Daniel Sadarnac, and Stephane Gautrais. "Wide Operating Range Current Loop Stability Analysis of a VIENNA-type Three-Phase Rectifier for a Medical Imaging System Power Supply." In Informatics in Control, Automation and Robotics, 544–68. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92442-3_27.

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Yu, Yang, Yunqi Guo, Zhaoyang Zhou, and Yonggang Huang. "Analysis of Three Kinds of Power Supply Modes of Auxiliary System in Urban Rail Train." In Proceedings of the 2015 International Conference on Electrical and Information Technologies for Rail Transportation, 163–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49367-0_18.

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4

Gao, Ming, Xiaohong Wang, Xiaochun Mou, and Houcheng Chu. "Research on Converter Topology and Control of Co-phase Traction Power Supply System Based on MMC Topology." In Proceedings of PURPLE MOUNTAIN FORUM 2019-International Forum on Smart Grid Protection and Control, 485–95. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9779-0_40.

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5

Fuchs, Ewald F., and Mohammad A. S. Masoum. "Three-Phase Power System and Three-Phase Transformers." In Power Conversion of Renewable Energy Systems, 339–85. Boston, MA: Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-7979-7_8.

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6

Conejo, Antonio J., and Luis Baringo. "Power System Fundamentals: Balanced Three-Phase Circuits." In Power Electronics and Power Systems, 17–54. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69407-8_2.

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Wicaksono, Hendro, Tina Boroukhian, and Atit Bashyal. "A Demand-Response System for Sustainable Manufacturing Using Linked Data and Machine Learning." In Dynamics in Logistics, 155–81. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-88662-2_8.

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AbstractThe spread of demand-response (DR) programs in Europe is a slow but steady process to optimize the use of renewable energy in different sectors including manufacturing. A demand-response program promotes changes of electricity consumption patterns at the end consumer side to match the availability of renewable energy sources through price changes or incentives. This research develops a system that aims to engage manufacturing power consumers through price- and incentive-based DR programs. The system works on data from heterogeneous systems at both supply and demand sides, which are linked through a semantic middleware, instead of centralized data integration. An ontology is used as the integration information model of the semantic middleware. This chapter explains the concept of constructing the ontology by utilizing relational database to ontology mapping techniques, reusing existing ontologies such as OpenADR, SSN, SAREF, etc., and applying ontology alignment methods. Machine learning approaches are developed to forecast both the power generated from renewable energy sources and the power demanded by manufacturing consumers based on their processes. The forecasts are the groundworks to calculate the dynamic electricity price introduced for the DR program. This chapter presents different neural network architectures and compares the experiment results. We compare the results of Deep Neural Network (DNN), Long Short-Term Memory Network (LSTM), Convolutional Neural Network (CNN), and Hybrid architectures. This chapter focuses on the initial phase of the research where we focus on the ontology development method and machine learning experiments using power generation datasets.
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8

Yadav, Shravan Kumar, and Krishna Bihari Yadav. "Implementation of Three-Phase Hybrid Energy System Integrated with UPQC." In Recent Advances in Power Electronics and Drives, 305–16. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9239-0_23.

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Prýmek, Miroslav, Aleš Horák, and Tadeusz Sikora. "Modelling Three-Phase Power Network with a Multi-agent System." In Agent and Multi-Agent Systems: Technologies and Applications, 130–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22000-5_15.

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Ghaedi, Alireza, and Mohammad Esmail Hamedani Golshan. "Wide-area Transmission System Fault Analysis Based on Three-Phase State Estimation with Considering Measurement Errors." In Power Systems, 449–79. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-54275-7_17.

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Тези доповідей конференцій з теми "Three-phase power supply system"

1

Itoh, Jun-ichi, Koki Yamanokuchi, Shunsuke Takuma, and Keisuke Kusaka. "Three-phase Wireless Power Supply System Using Matrix Converter." In 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe). IEEE, 2019. http://dx.doi.org/10.23919/epe.2019.8914969.

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Vazquez, Nimrod, Marcelino Gutierrez, and Claudia Hernandez. "Uninterruptible Power Supply System Based on Interleaved Three-Phase Boost Rectifiers." In IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2007. http://dx.doi.org/10.1109/iecon.2007.4460401.

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3

Heggannavar, Madhukesh, and Hemant Kulkarni. "Design of Magnetron power source from three phase supply." In 2015 International Conference on Energy Systems and Applications. IEEE, 2015. http://dx.doi.org/10.1109/icesa.2015.7503410.

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Chunxue Wen, Xiaoguang Zhu, Jianlin Li, and Honghua Xu. "Interleaved modulation of parallel three-phase PWM converters used for wind power system." In 2009 International Conference on Sustainable Power Generation and Supply. SUPERGEN 2009. IEEE, 2009. http://dx.doi.org/10.1109/supergen.2009.5348188.

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Moinoddin, Shaikh, Haitham Abu-Rub, and Atif Iqbal. "Dual five-phase power supply system using a three to ten-phase transformer connection." In IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2013. http://dx.doi.org/10.1109/iecon.2013.6699974.

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Saravana Prakash P and R. Kalpana. "High performance three-phase PFC rectifiers for telecom power supply." In 2016 IEEE 6th International Conference on Power Systems (ICPS). IEEE, 2016. http://dx.doi.org/10.1109/icpes.2016.7584098.

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ENACHE, Sorin, Aurel CAMPEANU, Ion VLAD, and Monica-Adela ENACHE. "Aspects Regarding Tests of Three-Phase Asynchronous Motors with Single-Phase Supply." In 2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA). IEEE, 2019. http://dx.doi.org/10.1109/elma.2019.8771636.

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Yan Zhao, NingYi Dai, and BaoAn. "Application of three-phase modular multilevel converter (MMC) in co-phase traction power supply system." In 2014 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific). IEEE, 2014. http://dx.doi.org/10.1109/itec-ap.2014.6941064.

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Wang, Xinyi, Cheng Guo, Fulin Zhou, and Jinfei Xiong. "A Hybrid Single-Phase to Three-Phase Power Supply System With Voltage Error Compensation Strategy." In 2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2021. http://dx.doi.org/10.1109/iciea51954.2021.9516044.

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10

Seyedalipour, S. Sajjad. "Modified Passivity-Based Control Technique of Three-Phase Multilevel Inverters for Uninterruptible Power Supply Applications." In 2019 International Power System Conference (PSC). IEEE, 2019. http://dx.doi.org/10.1109/psc49016.2019.9081484.

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Звіти організацій з теми "Three-phase power supply system"

1

Mi J. L. THE INITIAL COMPARISON AMONG THREE SCHEMES OF PROGRAMMABLE BIPOLAR POWER SUPPLY USED IN THE BOOSTER CORRECTION SYSTEM. Office of Scientific and Technical Information (OSTI), June 1988. http://dx.doi.org/10.2172/1151207.

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2

Porter, D. G., H. Meyer, and W. Leang. Three-phase power conversion system for utility-interconnected PV applications. Phase 1 technical progress report, 1 October 1995--17 April 1997. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/573118.

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3

Hughes K. B. THE ALTERNATING CURRENT POWER SYSTEM X/R RATIO AND ITS EFFECT ON THREE PHASE BRIDGE RECTIFIER OPERATION. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/1151218.

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Weinschenk, Craig, Daniel Madrzykowski, and Paul Courtney. Impact of Flashover Fire Conditions on Exposed Energized Electrical Cords and Cables. UL Firefighter Safety Research Institute, October 2019. http://dx.doi.org/10.54206/102376/hdmn5904.

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A set of experiments was conducted to expose different types of energized electrical cords for lamps, office equipment, and appliances to a developing room fire exposure. All of the cords were positioned on the floor and arranged in a manner to receive a similar thermal exposure. Six types of cords commonly used as power supply cords, extension cords, and as part of residential electrical wiring systems were chosen for the experiments. The non-metallic sheathed cables (NMB) typically found in residential electrical branch wiring were included to provide a link to previous research. The basic test design was to expose the six different types of cords, on the floor of a compartment to a growing fire to determine the conditions under which the cord would trip the circuit breaker and/or undergo an arc fault. All of the cords would be energized and installed on a non-combustible surface. Six cord types (18-2 SPT1, 16-3 SJTW, 12-2 NM-B, 12-3 NM-B, 18-3 SVT, 18-2 NISPT-2) and three types of circuit protection (Molded case circuit breaker (MCCB), combination Arc-fault circuit interrupter (AFCI), Ground-fault circuit interrupter (GFCI)) were exposed to six room-scale fires. The circuit protection was remote from the thermal exposure. The six room fires consisted of three replicate fires with two sofas as the main fuel source, two replicate fires with one sofa as the main fuel source and one fire with two sofas and MDF paneling on three walls in the room. Each fuel package was sufficient to support flashover conditions in the room and as a result, the impact on the cords and circuit protection was not significantly different. The average peak heat release rate of the sofa fueled compartment fires with gypsum board ceiling and walls was 6.8 MW. The addition of vinyl covered MDF wall paneling on three of the compartment walls increased the peak heat release rate to 12 MW, although most of the increased energy release occurred outside of the compartment opening. In each experiment during post flashover exposure, the insulation on the cords ignited and burned through, exposing bare conductor. During this period the circuits faulted. The circuit protection devices are not designed to provide thermal protection, and, thus, were installed remote from the fire. The devices operated as designed in all experiments. All of the circuit faults resulted in either a magnetic trip of the conventional circuit breaker or a ground-fault trip in the GFCI or AFCI capable circuit protection devices. Though not required by UL 1699, Standard for Safety for Arc-Fault Circuit-Interrupters as the solution for detection methodology, the AFCIs used had differential current detection. Examination of signal data showed that the only cord types that tripped with a fault to ground were the insulated conductors in non-metallic sheathed cables (12-2 NM-B and 12-3 NM-B). This was expected due to the bare grounding conductor present. Assessments of both the thermal exposure and physical damage to the cords did not reveal any correlation between the thermal exposure, cord damage, and trip type.
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Madrzykowski, Daniel, and Nicholas Dow. Residential Flashover Prevention with Reduced Water Flow: Phase 1. UL Firefighter Safety Research Institute, April 2020. http://dx.doi.org/10.54206/102376/jegf7178.

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This study was designed to be an initial step to investigate the potential of low flow nozzles as part of a retrofit flashover prevention system in residential homes with limited water supplies. Not all homes have water supplies that can meet the needs of a residential sprinkler system. Current alter- natives, such as including a supplemental tank and pump, increase the cost of the system. These homes could benefit from an effective fire safety system with lower water supply requirements. The experiments in this study were conducted in a steel test structure which consisted of a fire room attached to a hallway in an L-shaped configuration. Three types of experiments were conducted to evaluate nozzles at different flow rates and under different fire conditions. The performance of the nozzles was compared to the performance of a commercially available residential sprinkler. The first set of experiments measured the distribution of the water spray from each of the nozzles and the sprinkler. The water spray measurements were made without the presence of a fire. The other two sets of experiments were fire experiments. The first set of fire experiments were designed to measure the ability of a water spray to cool a hot gas layer generated by a gas burner fire. The fire source was a propane burner which provided a steady and repeatable flow of heat into the test structure. Two water spray locations were examined, in the fire room and in the middle of the hallway. In each position, the burner was shielded from the water spray. The results showed that for equivalent conditions, the nozzle provided greater gas cooling than the sprinkler. The tests were conducted with a fire size of approximately 110 kW, and water flow rates in the range of 11 lpm (3 gpm) and 19 lpm (5 gpm). The second set of fire experiments used an upholstered sofa as the initial source of the fire with the water spray located in the same room. As a result of the compartment size and water spray distribution, the nozzle flowing water at 23 lpm (6 gpm) provided more effective suppression of the fire than the sprinkler flowing 34 lpm (9 gpm) did. The nozzle was similarly effective with the ignition location moved 1.0 m (3.2 ft) further away. However, the nozzle failed to suppress the fire with a reduced water flow rate of 11 lpm (3 gpm). The results of this limited study demonstrate the potential of low flow nozzles, directly flowing water on to the fuel surface, with the goal of preventing flashover. Additional research is needed to examine larger room sizes, fully furnished rooms, and shielded fires to determine the feasibility of a reduced water flow flashover prevention system.
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Refurbish power supply/distribution system, Phase 2, Y-12 Plant, Oak Ridge. Progress status report number 51. Office of Scientific and Technical Information (OSTI), November 1995. http://dx.doi.org/10.2172/171318.

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7

Refurbish power supply/distribution system Phase II. Progress status report No. 43, March 1, 1995--March 31, 1995. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/83824.

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Department of Energy refurbish power supply/distribution system: Phase 2, Y-12 Plant, Oak Ridge. Project status report No. 40, December 1--31, 1994. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/74514.

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