Дисертації з теми "Modern power system"
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Hernandez, Michael. "Applications of modern control in power electronics." Paris 11, 2010. http://www.theses.fr/2010PA112161.
Повний текст джерелаIn the first part, this dissertation continues with the framework for analysis and design of (possibly nonlinear) power factor (PF) compensators for electrical systems operating in non-sinusoidal (but periodic) regimes with nonlinear loads. In particular, under the standard assumption that the generator is a voltage source with no impedance, we characterized all nonlinear loads whose PF is improved with a given nonlinear compensator. And this framework is used to study the problem of passive PF compensation of a classical half-bridge controlled rectifier. Given the “phase advance” operation of the rectifier it is expected that capacitive compensation improves PF, it is however less obvious that this can also be achieved (under some suitable conditions) with inductors. In the second part, A methodology to design linear proportional-integral (PI) controllers used in power converter applications and ensuring asymptotic stability was proposed. The technique relied on the basic fact that if an affine system can be rendered passive with a constant control, then it is stabilizable with a PL A structural condition was imposed then on the power converter to satisfy the former property with a passive output generated as a linear combination of the states. This condition is technical and has no clear physical interpretation. This result is extended in three directions : first, the aforementioned condition is removed ; second, a larger class of converters (with switching external sources) is considered ; third, the load resistance is assumed unknown and an adaptive PI controller (with three different estimators) is proposed. The methodology is applied to the problem of power factor compensation of a 3-phase. Voltage source rectifier, with simulation results proposed. Also, a stable adaptive PI is designed for the output voltage regulation of a quadratic boost converter showing the performance by means of experimental result. In the third part some controllers based on the concept of charge control for a converter used in an application of power factor correction are shown. The converter is composed by the interleaved connection of two or more boost converters connected to the grid by means of a non controlled diode rectifier. Charge control represents a cheap solution to guarantee current sharing among the different converters involved, and is normally used in combination with other controllers. The two controllers are first designed to guarantee the power factor close to one with regulated DC voltage, to which charge control is added to distribute equal current among the converters. Finally, a simplification with similar performance is presented that eliminates the use of current sensors, except for the current transformers required to implement the charge control, experimental results complete this part. The fourth part presents the implementation and programming of a method to track the maximum power point (MPP) in photovoltaic (PV) applications. This operation point is of special interest as it is required to extract the maximum power available from the photovoltaic arrays
Dong, Zhao Yang. "Advanced methods for small signal stability analysis and control in modern power systems." Phd thesis, School of Electrical and Information Engineering, Graduate School of Engineering, 1998. http://hdl.handle.net/2123/6416.
Повний текст джерелаHu, Boyang. "Design and Analysis of PV/Battery/EV in Modern Distribution Power System." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/9896.
Повний текст джерелаAlghamdi, Turki. "Interactions of Connected Electric Vehicles with Modern Power Grids in Smart Cities." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42513.
Повний текст джерелаSiebrits, Andre. "The role of great power war in the rise of Hegemons : a study of Dutch Hegemonic ascent in the modern world-system." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/2787.
Повний текст джерелаENGLISH ABSTRACT: This study explores the claim that Great Power Wars are a necessary condition for successful hegemonic ascent in the modern world-system, primarily from the standpoint of World- Systems Analysis. This study advances the conception of hegemony primarily in economic and state terms, and it was investigated, by way of a historical case study, how the Thirty Years’ War (1618-1648) impacted the economic domains of agro-industrial production, commerce, and finance of the United Provinces of the Netherlands, and its main rival for systemic leadership, Hapsburg Spain. The variables utilised in the study were Great Power War, and the ‘material base’ of the state involved (both independent), the three abovementioned economic domains (intervening), and hegemony or defeat (dependent). The case study was primarily descriptive and explanatory, with the use of process-tracing in its compilation, and a method of within-case structured, focused comparison was utilised with the aim of tentatively producing standardised, generalised knowledge concerning the wider link between Great Power War and hegemony beyond the Dutch case. The findings of the study, although derived from only one historical case of hegemonic ascent in the modern world-system, strongly support the argument that Great Power War is necessary to secure the hegemony of the leading insular core state, which is physically removed from the fighting during the conflict, since the full mobilisation of its economy is effected, while the economies of most other core states are impaired, especially the main continental rival for hegemony. However, the ascending hegemon must also possess the requisite favourable ‘material base’. Further research on this topic is called for, given the potential destructiveness of a future Great Power War, and its role in establishing hegemony in the modern world-system.
AFRIKAANSE OPSOMMING: Hierdie studie ondersoek die bewering dat Groot Moontheid Oorloë ‘n noodsaaklike vereiste is vir suksesvolle hegemoniese bestyging in die moderne wêreld-sisteem, hoofsaaklik vanaf die standpunt van Wêreld-Sisteem Analise. Hierdie studie bevorder die konsepsie van hegemonie hoofsaaklik in ekonomiese en staat terme, en dit het ondersoek, deur middel van ‘n historiese gevallestudie, hoe die Dertig Jaar Oorlog (1618-1648) ingewerk het op die ekonomiese arenas van agri-industriële produksie, handel, and finansies van die Verenigde Provinsies van Nederland, en hul mededinger vir sistemiese leierskap, Spanje. Die veranderlikes wat in die studie ingespan was, was Groot Moontheid Oorlog, en die ‘materiële basis’ van die state in kwessie (onafhanlik), die drie bogenoemde ekonomiese arenas (albei tussenkomend), en hegemonie of nederlaag (afhanklik). Die gevallestudie was hoofsaaklik beskrywend en verduidelikend, en proses-nasporing (oftewel ‘process-tracing’) is in die samestelling daarvan benut, en ‘n metode van gestruktureerde, gefokusde vergelyking (oftewel ‘structured, focused comparison’) is gebruik binne die gevallestudie met die doel om tentatiewe gestandardiseerde en veralgemeende kennis te genereer wat bydra tot die verduideliking van die wyer skakel tussen Groot Moontheid Oorlog en hegemonie buite die geval van die Verenigde Provinsies. Die bevindinge van die studie, hoewel gegenereer aan die hand van slegs een historiese geval van hegemoniese bestyging in the moderne wêreld-sisteem, het sterk steun verleen aan die argument dat Groot Moontheid Oorloë nodig is om die hegemonie van die vernaamste insulêre kern staat te bewerkstellig, wat fisies verwyderd van die gevegte is tydends die oorlog, aangesien die volle mobilisasie van die ekonomie van hierdie staat bewerkstellig word, terwyl die ekonomieë van die meerderheid van die ander kernstate benadeel word, veral die vernaamste kontinentale mededinger om hegemonie. Die opkomende hegemoon moet egter ook oor die vereiste gunstige ‘materiële basis’ beskik. Verdere navorsing in hierdie veld word benodig, gegewe die waarskynlike vernietiging wat gesaai kan word deur ‘n toekomstige Groot Moontheid Oorlog, en die rol daarvan in die daarstelling van hegemonie in die moderne wêreld-sisteem.
Hlinecký, Tomáš. "Využití moderních inteligentních elektroinstalací pro osvětlení budov." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217828.
Повний текст джерелаKaňovský, Jiří. "Energetické systémy v moderní výstavbě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221202.
Повний текст джерелаKuhn, Martin Raphael [Verfasser], Martin [Akademischer Betreuer] Otter, Ulrich [Gutachter] Wagner, and Martin [Gutachter] Otter. "Design of a modern aircraft's electrical network system with focus on power quality and network stability via multi-level modeling / Martin Raphael Kuhn ; Gutachter: Ulrich Wagner, Martin Otter ; Betreuer: Martin Otter." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1176701711/34.
Повний текст джерелаRajkumar, Naganathy. "Novel algorithms for modern power systems." Thesis, City University London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390941.
Повний текст джерелаAnderson, Sharon Lee. "Reduced order power system models for transient stability studies." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09052009-040743/.
Повний текст джерелаKryukova, N. V., Evgen Viktorovych Goncharov, and I. V. Polyakov. "Modern monitoring systems of electric power lines." Thesis, NTU "KhPI", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38909.
Повний текст джерелаТугай, Дмитро Васильович. "Енергоефективність інтелектуальних систем електропостачання з напівпровідниковими перетворювачами електроенергії". Thesis, Харківський національний університет міського господарства ім. О. М. Бекетова, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29735.
Повний текст джерелаThesis for a Doctor’s degree in Engineering Science by specialty 05.09.03 – Electrical Engineering Complexes and Systems. National Technical University "Kharkov Polytechnic Institute", Kharkiv, 2017. The dissertation is developed to the modern theory of instantaneous active and reactive power for calculating losses power in Smart Grid three-phase energy supply system (ESS). The accuracy of calculation methods for selecting parameters of the power active filter and voltage-source active rectifier has been increased. An issue criteria substantiation to minimize energy losses and the theorem of minimum energy losses in the threephase ESS has been formulated. New universal ratio that can provide losses power of three-phase ESS as the sum of components, each of which is due to the peculiarities of electromagnetic processes is obtained. The concept of presenting the total losses power through the component that is based on the p-q-r theory of instantaneous active and reactive power is proved. The ratios for determine the asymmetry coefficients to the reverse current and the zero sequence components through losses power in pqr coordinates are obtained. Based on provisions of p-q-r theory of instantaneous active and reactive power the method of measuring components of total losses power in three-phase ESS have been developed. All the theoretical results, obtained in the thesis, in energy-saving converters computer models have been tested.
Тугай, Дмитро Васильович. "Енергоефективність інтелектуальних систем електропостачання з напівпровідниковими перетворювачами електроенергії". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29732.
Повний текст джерелаThesis for a Doctor’s degree in Engineering Science by specialty 05.09.03 – Electrical Engineering Complexes and Systems. National Technical University "Kharkov Polytechnic Institute", Kharkiv, 2017. The dissertation is developed to the modern theory of instantaneous active and reactive power for calculating losses power in Smart Grid three-phase energy supply system (ESS). The accuracy of calculation methods for selecting parameters of the power active filter and voltage-source active rectifier has been increased. An issue criteria substantiation to minimize energy losses and the theorem of minimum energy losses in the threephase ESS has been formulated. New universal ratio that can provide losses power of three-phase ESS as the sum of components, each of which is due to the peculiarities of electromagnetic processes is obtained. The concept of presenting the total losses power through the component that is based on the p-q-r theory of instantaneous active and reactive power is proved. The ratios for determine the asymmetry coefficients to the reverse current and the zero sequence components through losses power in pqr coordinates are obtained. Based on provisions of p-q-r theory of instantaneous active and reactive power the method of measuring components of total losses power in three-phase ESS have been developed. All the theoretical results, obtained in the thesis, in energy-saving converters computer models have been tested.
Parveen, Tania. "Composite load model decomposition : induction motor contribution." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/31301/1/Tania_Parveen_Thesis.pdf.
Повний текст джерелаAltamirano, Chavez Armando. "An efficient algorithm using Householder's formulas for the solution of faulted power systems." Thesis, Kansas State University, 1986. http://hdl.handle.net/2097/9896.
Повний текст джерелаKamarudin, Syalwani. "Advanced Doherty power amplifier design for modern communication systems." Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/115269/.
Повний текст джерелаHammer, Anders. "Analysis of IEEE Power System Stabilizer Models." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14035.
Повний текст джерелаShao, Jin. "Advanced Power Amplifiers Design for Modern Wireless Communication." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804973/.
Повний текст джерелаStefopoulos, Georgios Konstantinos. "Quadratic power system modeling and simulation with application to voltage recovery and optimal allocation of VAr support." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29695.
Повний текст джерелаCommittee Chair: Meliopoulos, A. P. Sakis; Committee Member: Deng, Shijie; Committee Member: Divan, Deepakraj; Committee Member: Harley, Ronald; Committee Member: Taylor, David. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Le, Dantec Jorge I. (Jorge Ignacio). "Assessing business models arising from the integration of distributed energy systems in the Chilean electric power system." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90714.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 83-84).
Electric power systems are more than just networks of generation, transmission and distribution assets. They are socio-technical systems, involving regulation, markets and technology availability. Presently, the dynamic relation among these aspects is creating new consumer needs in many power systems around the world, which incumbent electricity utilities do not seem well suited to meet at the required pace. In this context, the integration of Distributed Energy Systems (DESs) and their related business models appears as a flexible and often more affordable option to deliver value, by fulfilling the unmet needs of both consumers and utilities. To advice Chilean electric power system's stakeholders about the adequacy of a set of DES-related business models to Chilean needs, this document presents a systematic analysis, which focuses on the interrelation between business model attributes, involved DES technologies, and stakeholder needs. Specifically, an analytic framework is developed and applied to some business models currently operative in other markets, measuring their adequacy to meet stakeholders' needs in a set of envisioned scenarios of Chile's power system. This work provides a systematic tool for decision-making processes in selecting business models, when the decision must be made with qualitative data. Moreover, the evaluation in the Chilean system of actual business models shows results that should be valuable for consumers, utilities, and regulators.
by Jorge I. Le Dantec.
S.M. in Engineering and Management
Wang, Chun. "Methodologies and algorithms for fault locators in modern power systems." Thesis, University of the West of England, Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392859.
Повний текст джерелаNteka, Makhetsi Flora. "Development and assessment of reduced order power system models." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/1088.
Повний текст джерелаThe demand for electrical energy has kept on increasing, thus causing power systems to be more complex and bringing the challenging problems of electrical energy generation, transmission, stability, as well as storage to be examined more thoroughly. With the advent of high-speed computation and the desire to analyze increasingly complex behaviour in power systems, simulation techniques are gaining importance and prevalence. Nevertheless, while simulations of large, interconnected complex power systems are feasible, they remain time-consuming. Moreover, the models and parameters used in simulations are uncertain, due to measurement uncertainty, the need to represent a complex behaviour with low-order models, and the inherent changing nature of the power system. This research explores the use of a model reduction technique and the applications of a Real-Time Digital Simulator (RTDS) to reduce the uncertainty in large-scale complex power system models. The main goal of the research is to develop a reduced order model and to investigate the applications of the RTDS simulator in reduction of large, interconnected power systems models. The first stage of the study is to build and simulate the full model of the power system using the DigSILENT and RTDS simulators. The second phase is to apply model reduction technique to the full model and to determine the parameters in the reduced-order model as well as how the process of reduction increases this model uncertainty. In the third phase the results of the model reduction technique are compared based on the results of the original model - IEEE standard benchmark models has been used. The RTDS was used for comparative purposes. The thesis investigations use a particular model reduction technique as Coherency based Method. Though the method ideas are applicable more generally, a concrete demonstration of its principles is instructive and necessary. Further, while this particular technique is not relevant to every system, it does apply to a broad class of systems and illustrates the salient features of the proposed methodology. The results of the thesis can be used in the development of reduced models of complex power systems, simulation in real-time during power system operation, education at universities, and research. Keywords: IEEE benchmark models, reduced models, Coherency based Method, DigSILENT, RTDS, model uncertainty, power system stability
Mazumdar, Joy. "System and method for determining harmonic contributions from nonlinear loads in power systems." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/23215.
Повний текст джерелаRaoofsheibani, Davood [Verfasser]. "Online Power System Security Analysis and State Prediction : Enhanced Power System Models and Tools / Davood Raoofsheibani." Düren : Shaker, 2021. http://d-nb.info/1240853947/34.
Повний текст джерелаPersson, Jonas. "Linear models of non-linear power system components." Licentiate thesis, KTH, Electrical Systems, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1415.
Повний текст джерелаCresswell, Charles. "Steady state load models for power system analysis." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3846.
Повний текст джерелаScruggs, James N. "Power system availability determination through Petri net simulation." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1178910568.
Повний текст джерелаYuan, Lin. "Design space re-engineering for power minimization in modern embedded systems." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3651.
Повний текст джерелаThesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Wang, Longfei. "High Performance Distributed On-Chip Voltage Regulation for Modern Integrated Systems." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7590.
Повний текст джерелаDemiray, Turhan Hilmi. "Simulation of power system dynamics using dynamic phasor models /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17607.
Повний текст джерелаHolm, Gustav. "Automated Model Transformation for Cyber-Physical Power System Models." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214750.
Повний текст джерелаChevalier, Samuel Chapman. "Inference, estimation, and prediction for stable operation of modern electric power systems." Thesis, Massachusetts Institute of Technology, 2021. https://hdl.handle.net/1721.1/130842.
Повний текст джерелаCataloged from the official PDF of thesis.
Includes bibliographical references (pages 261-277).
To keep pace with social-ecological disruptions and technological progressions, electrical power systems must continually adapt. In order to address the stability-related challenges associated with these adaptations, this thesis develops a set of analytically rigorous yet practically oriented methods for ensuring the continued stability of modern power systems. By leveraging inference, estimation, and predictive modeling techniques, the proposed methods capitalize on the unprecedented amount of real time data emerging from modernizing smart grids. For each method, we provide simulated test results from IEEE benchmark systems. Newly deployed Phasor Measurement Units (PMUs) are observing the presence of detrimental low frequency forced oscillations (FOs) in transmission grid networks. To begin this thesis, we address the problem of locating the unknown sources of these FOs.
To perform source identification, we develop an equivalent circuit transformation which leverages suitably constructed transfer functions of grid elements. Since FO sources appear in this equivalent circuit as independent current injections, a Bayesian framework is applied to locate the most probable source of these injections. Subsequently, we use our equivalent circuit to perform a systematic investigation of energy-based source identification methods. We further leverage this equivalent circuit transformation by developing "plug-and-play" stability standards for microgrid networks that contain uncertain loading configurations. As converter-based technology declines in cost, microgrids are becoming an increasingly feasible option for expanding grid access. Via homotopic parameterization of the instability drivers in these tightly regulated systems, we identify a family of rotational functions which ensure that no eigenmodes can be driven unstable.
Any component which satisfies the resulting standards can be safely added to the network, thus allowing for plug-and-play operability. High-fidelity linearized models are needed to perform both FO source identification and microgrid stability certification. Furthermore, as loss of inertia and real-time observability of grid assets accelerate in tandem, real-time linearized modeling is becoming an increasingly useful tool for grid operators. Accordingly, we develop tools for performing real-time predictive modeling of low frequency power system dynamics in the presence of ambient perturbations. Using PMU data, we develop a black-box modeling procedure, known as Real-Time Vector Fitting (RTVF), that takes explicit account for initial state decay and concurrently active input signals. We then outline a proposed extension, known as stochastic-RTVF, that accounts for the corrupting effects of unobservable stochastic inputs.
The surrogate modeling utilized by vector fitting can also be applied to the steady state power flow problem. Due to an unprecedented deployment of distributed energy resources, operational uncertainty in electrical distribution networks is increasing dramatically. To address this challenge, we develop methodology for speeding up probabilistic power flow and state estimation routines in distribution networks. We do so by exploiting the inherently low-rank nature of the voltage profile in these systems. The associated algorithms dynamically generate a low-dimensional subspace which is used to construct a projection-based reduced order model (ROM) of the full nonlinear system. Future system solves using this ROM are highly efficient.
by Samuel Chapman Chevalier.
Ph. D. in Mechanical Engineering and Computation
Ph.D.inMechanicalEngineeringandComputation Massachusetts Institute of Technology, Department of Mechanical Engineering
Phung, James Hon-Hoe. "Power Modeling in Modern Server Systems: An Examination of Various Novel Approaches." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/21376.
Повний текст джерелаShridevi, Rajesh Jayashankara. "Emerging Security Threats in Modern Digital Computing Systems: A Power Management Perspective." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7483.
Повний текст джерелаPersson, Jonas. "Bandwidth-reduced Linear Models of Non-continuous Power System Components." Doctoral thesis, Stockholm : Electric Power Systems, School of Electrical Engineering, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3984.
Повний текст джерелаBranney, Sean J. "Comparison and development of hurricane electrical power system damage models." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5657.
Повний текст джерелаThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 25, 2008) Includes bibliographical references.
Hockenberry, James Richard. "Evaluation of uncertainty in dynamic, reduced-order power system models." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/46685.
Повний текст джерелаIncludes bibliographical references (leaves 209-213).
With the advent of high-speed computation and the desire to analyze increasingly complex behavior in power systems, simulation techniques are gaining importance and prevalence. However, while simulations of large, interconnected power systems are feasible, they remain time-consuming. Additionally, the models and parameters used in simulations are uncertain, due to measurement uncertainty, the need to approximate complex behavior with low-order models and the inherent changing nature of the power system. This thesis explores the use of model reduction techniques to enable the study of uncertainty in large-scale power system models. The main goal of this thesis is to demonstrate that uncertainty analyses of transient simulations of large, interconnected power systems are possible. To achieve this, we demonstrate that a basic three stage approach to the problem yields useful results without significantly increasing the computational burden. The first stage is to reduce the order of the original power system model, which reduces simulation times and allows the system to be simulated multiple times in a reasonable time-frame. Second, the mechanics of the model reduction are closely studied; how uncertainties affect the reduction process and the parameters in the reduced-order model as well as how the process of reduction increases uncertainty are of particular interest. Third, the reduced-order model and its accompanying uncertainty description are used to study the uncertainty of the original model. Our demonstration uses a particular model reduction technique, synchronic modal equivalencing (SME), and a particular uncertainty analysis method, the probabilistic collocation method (PCM). Though our ideas are applicable more generally, a concrete demonstration of the principle is instructive and necessary. Further, while these particular techniques are not relevant to every system, they do apply to a broad class of systems and illustrate the salient features of our methodology. As mentioned above, a detailed analysis of the model reduction technique, in this case SME, is necessary. As an ancillary benefit of the thesis work, interesting theoretical results relevant to the SME algorithm, which is still under development, are derived.
by James R. Hockenberry.
Ph.D.
Abur, Ali. "Knowledge-based power flow models and array processor-based power flow solutions for fast prediction of system states /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487261553057511.
Повний текст джерелаDu, Zhaobin, and 杜兆斌. "Area COI-based slow frequency dynamics modeling, analysis and emergency control for interconnected power systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B4175783X.
Повний текст джерелаHa, Dinh Truc. "Line outage vulnerabilities of power systems : models and indicators." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT018/document.
Повний текст джерелаThe vulnerability of electrical systems is one of the problems related to their complexity. It has received increasing attention from researchers in recent decades. Despite this, the fundamental phenomena that govern the vulnerability of the system are still not well understood.Understanding how the vulnerability of power systems emerges from their complex organization is, therefore, the main motivation of the present work. It proposes the definition of a standard method to assess the vulnerability of power systems and identify their most critical elements. The method enables a better understanding of the links between the topology of the grid and the line outage vulnerabilities.The first part of this research work offers a critical review of literature approaches used to assess system vulnerability. The results provided by these approaches for four IEEE test systems are confronted to a reference contingency analysis using AC power flow calculations. From these analyses, pros and cons of each approach are outlined. An improved method for assessment of system vulnerability to line outages is defined from this confrontation. It is based on DC load flow and graph theory.The second part proposes a new approach based on spectral graph theory and solving of DC power flow to identify how system vulnerability and critical components emerge from the power network topology
廖德寧 and Te-Ning Liao. "A vertical axial-field generator and its stability in power system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207789.
Повний текст джерелаLy, Cuong. "Reliability study of the Callide power station electrical system." Thesis, Queensland University of Technology, 1997. https://eprints.qut.edu.au/36023/1/36023_Ly_1997.pdf.
Повний текст джерелаPourbeik, Pouyan. "Design and coordination of stabilisers for generators and FACTS devices in multimachine power systems /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09php877.pdf.
Повний текст джерелаSchürmans, Stefan [Verfasser], Rainer [Akademischer Betreuer] Leupers, and Tobias [Akademischer Betreuer] Gemmeke. "Power Estimation on Electronic System Level using Linear Power Models / Stefan Schürmans ; Rainer Leupers, Tobias Gemmeke." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1171323808/34.
Повний текст джерелаPIRES, Robson Celso. "Complex-Valued Steady-State Models as Applied to Power Flow Analysis and Power System State Estimation." reponame:Repositório Institucional da UNIFEI, 2018. http://repositorio.unifei.edu.br/xmlui/handle/123456789/1359.
Повний текст джерелаMade available in DSpace on 2018-06-15T13:12:49Z (GMT). No. of bitstreams: 1 tese_2018_pires_robson.pdf: 2114807 bytes, checksum: d730bc3798b4777ca67282b62e72c7e0 (MD5) Previous issue date: 2018-06
Nonlinear systems of equations in complex domain are frequently encountered in applied mathematics, e.g., power systems, signal processing, control theory, neural networks and biomedicine, to name a few. The solution of these problems often requires a first- or second-order approximation of these nonlinear functions to generate a new step or descent direction to meet the solution iteratively. However, such methods cannot be applied to real functions of complex variables because they are necessarily non-analytic in their argument, i.e., the Taylor series expansion in their argument alone does not exist. To overcome this problem, the nonlinear function is usually redefined as a function of the real and imaginary parts of its complex argument so that standard methods can be applied. Although not widely known, it is possible to build an expansion of these nonlinear functions in its original complex variables by noting that functions of complex variables can be analytic in their argument and its complex conjugate as a whole. This property lies in the fact that if a function is analytic in the space spanned by ℜ{} and ℑ{}in ℝ, it is also analytic in the space spanned by and * in ℂ. The main contribution of this work is the application of this methodology to a complex Taylor series expansions aiming algorithms commonly used for solving complex-valued nonlinear systems of equations emerged from power systems problems. In our proposal, a complex-valued power ow analysis (CV PFA) model solved by Newton-Raphson method is revisited and enhanced. Nonetheless, especially emphasis is addressed to Gauss-Newton method when derived in complex domain for solving power system state estimation (CV PSSE) problems, whichever they are applied in transmission or distribution systems. The factorization method of the complex Jacobian matrices emerged from CV PFA and CV PSSE approaches is the Three Angle Complex Rotation (TACR) algorithm that comes from the Givens Rotations algorithm in real domain. In this research one demonstrates that Wirtinger derivatives can lead to greater insights in the structure of both problems, i.e., CV PFA & CV PSSE. Moreover, it can often be exploited to mitigate computational overhead, storage cost and enhance the network's component modeling as FACTS devices, e.g., STATCOM, VSC-HVDC, besides easily handle PMU measurements and embedding new technologies towards smart grids. Finally, in order to add numerical robustness, a fourth-order Levenberg-Marquardt algorithm is employed to the CV PFA & CV PSSE approaches because of its nice bi-quadratic convergence property, instead of the well-known quadratic convergence property of the classical Newton-Raphson and Gauss-Newton algorithms. Recall that these latter algorithms are prone to collapse when the power system network is ill-conditioned, i.e., it is heavily loaded or presents branches with high R/X ratio. These results are partially presented in this thesis because they are still under study and development. But most of them will appear in forthcoming papers submitted to IEEE-PES Transactions on Power Systems and coming up Top Conferences.
Adepetu, Adeyemi (Adeyemi Adetayo). "Exploring neighborhood power production technologies and business models for developing economies." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/100087.
Повний текст джерела"September 2014." Cataloged from PDF version of thesis.
Includes bibliographical references (pages 46-47).
A Neighborhood Power Producer business solution, which aggregates customers and therefore employs economies of scale, is one solution to the energy access issue of most developing economies. In this approach, entrepreneurs contract with a group of colocated residents or businesses to provide modem energy services. This service can be grid-tied or off-grid, serving as either backup power to the central electricity grid or as primary power, depending on access to the electric grid and/or the quality and availability of power. These systems are essentially micro-grids with distributed generation. These developing world Neighborhood Power Producers will also benefit from the rising demand for a more distributed electric grid as a solution to the threat of adverse weather like hurricanes and super storms in developed economies. Cyber security threats are also leading to increased research into distributed power generation systems. This provides technological advances that are powered by investments in developed markets. The developing economies can essentially leapfrog their more developed counterparts with regards to grid-resiliency. The goal of this thesis is to examine broad trends in the Neighborhood Power Producer business model and what strategies are necessary for business sustainability in the short, mid, and longer term.
by Adeyemi Adepetu.
S.M.
Farahmand, Hossein. "Integrated Power System Balancing in Northern Europe - Models and Case Studies." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16864.
Повний текст джерелаGuo, Song. "Adaptive parameter estimation of power system dynamic models using modal information." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10576/.
Повний текст джерелаTong, Y.-K. "Circuit models and simulations of surge attentuation on HV transmission system." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235205.
Повний текст джерелаBakkabulindi, Geofrey. "Planning Models for Single Wire Earth Return Power Distribution Networks." Licentiate thesis, KTH, Elektriska energisystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-107160.
Повний текст джерелаQC 20121207
Sustainable Technological Development in the Lake Victoria Region