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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
281

Synthesis and solubility of nickel and iron "hideout" reaction products with aqueous sodium and ammonium phosphate under steam generator conditions /

Harvey, Rosemarie Gail, January 2003 (has links)
Thesis (M.Sc.)--Memorial University of Newfoundland, 2003. / Bibliography: leaves 124-131. Also available online.
282

Independent component analysis for harmonic source identification in electric power systems /

Gursoy, Ekrem. Niebur, Dagmar. January 2007 (has links)
Thesis (Ph. D.)--Drexel University, 2007. / Includes abstract and vita. Includes bibliographical references (leaves 139-147).
283

Harmonic state estimation and transient state estimation : a thesis presented for the degree of Doctor of Philosophy in Electrical and Electronic Engineering at the University of Canterbury, Christchurch, New Zealand /

Yu, Kent K. C. January 2005 (has links)
Thesis (Ph. D.)--University of Canterbury, 2005. / Typescript (photocopy). Includes bibliographical references (p. 135-138). Also available via the World Wide Web.
284

Distribution system planning a set of new formulations and hybrid algorithms /

Wang, Zhuding. January 2000 (has links) (PDF)
Thesis (Ph. D.)--University of Wisconsin--Milwaukee, 2000. / Major Professor: David C. Yu. Includes bibliographical references.
285

Multiagent approach for power system reconfiguration

Tulpule, Pinak. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains x, 89 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 81-89).
286

Power market analysis tool for congestion management

Parnandi, Silpa. January 2007 (has links)
Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains viii, 71 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 68-71).
287

Aggregate feasibility sets for large power networks

January 1984 (has links)
Pierre Dersin, Alexander H. Levis. / Bibliography: leaves [5]-[6]. / "January 1984." Paper to be presented at the 9th IFAC World Congree, Budapest, Hungary, July 2-6, 1984. / AC01-77-ET29033
288

Automatic location of transient power quality disturbances /

Parsons, Antony Cozart, January 1999 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 157-163). Available also in a digital version from Dissertation Abstracts.
289

Modeling, prediction and mitigation of power distribution system voltage distortion caused by nonlinear loads /

Wang, Yen-Ju, January 2000 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves 106-111). Also available on the Internet.
290

Projeto de controladores de amortecimento para unidades eólicas de geração baseadas em gerador de indução duplamente alimentado

Zamadei, José Alexandre 28 May 2012 (has links)
A forte expansão da geração eólica é uma tendência mundial que altera a estrutura, o planejamento, a operação e a dinâmica dos sistemas de potência. Dessa forma, é importante que as unidades de geração eólica assumam responsabilidade pela confiabilidade e estabilidade do sistema de potência. Um bom desempenho transitório e uma boa margem de estabilidade para o sistema de potência dependem de estudos técnicos e da utilização de estratégias adequadas de controle. Nesse contexto, o presente trabalho propõe a inclusão de uma malha de controle suplementar em unidades eólicas de geração baseadas em gerador de indução duplamente alimentado. O objetivo da malha de controle suplementar proposta é melhorar a margem de estabilidade a pequenas perturbações de unidades eólicas e do sistema de potência. Controladores de amortecimento para a malha de controle suplementar proposta são projetados para amortecer as oscilações eletromecânicas causadas por unidades eólicas e por unidades de geração convencionais baseadas em gerador síncrono. Uma análise para definir a melhor entrada de controle para a inclusão da malha de controle suplementar da unidade de geração eólica é feita usando resíduos da função de transferência. As análises e testes são realizados usando dois sistemas diferentes: sistema composto por uma única unidade eólica conectada a um barramento infinito e sistema constituído por uma unidade eólica e uma unidade de geração convencional baseada em gerador síncrono conectadas a um barramento infinito. Duas diferentes metodologias são adotadas para o projeto/síntese do controlador da malha de controle suplementar. Uma metodologia de projeto é baseada na teoria de controle clássico e a outra metodologia baseia-se na teoria de controle modernorobusto. Os resultados obtidos mostram que a inclusão da malha de controle suplementar proposta foi eficaz na melhoria da margem de estabilidade a pequenas perturbações do sistema de potência. Esses resultados demonstram também que unidades eólicas baseadas em gerador de indução duplamente alimentado podem contribuir com a melhoria da margem de estabilidade do sistema de potência. / The strong expansion of wind generation is a global trend that changes the structure, planning operation and dynamics of power systems. Thus, it’s important that the units of wind generation take responsibility for the reliability and stability of power system. A good transient performance and good degree of stability for the power system depend of technical studies and of the use of appropriate strategy controls. In this context, this study proposes the inclusion of a additional control loop on generating wind turbines based on doubly fed induction generator. The purpose of the proposed additional control loop is to improve the stability margin to small perturbations of wind turbines and power system. Damping controllers for the proposes additional control loop are designed to damp the oscillations caused by the wind turbines and conventional generating units based on synchronous generator. An analysis to determinate the best control input for the inclusion of the control loop further wind power generation unit is performed using waste transfer function. The analyses and tests are performed using two different test systems: system comprising a single wind unit connected to a infinite bus and a system comprising a wind unit and a wind power generation based on the conventional synchronous generator connected to an infinite bus. Two different methods are adopted for the project / synthesis of the controller of the additional control loop. A project methodology is based on classical control theory and the other is based on modern-robust control theory. The obtained results show that the inclusion of additional control loop was efficient in improving the stability margin of small perturbations of the power system. These results also demonstrate that wind turbines based in doubly fed induction generator can contribute to improving the stability margin of the power system.

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