Thesis (doctoral)--University of Newcastle, 1990.

Thesis (doctoral)--Lund University, Sweden, 1994. / Includes bibliographical references.

Thesis (Ph. D.)--Chemical and Biomolecular Engineering, Georgia Institute of Technology, 2007. / Andreas S. Bommarius, Committee Member ; L. Andrew Lyon, Committee Member ; J. Carson Meredith, Committee Member ; William J. Koros, Committee Member ; Victor Breedveld, Committee Chair.

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.

Thesis (M.S.)--Missouri University of Science and Technology, 2009. / Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 17, 2009) Includes bibliographical references (p. 67-70).

Made available in DSpace on 2014-06-11T19:22:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-02Bitstream added on 2014-06-13T18:07:16Z : No. of bitstreams: 1 silva_rc_me_ilha.pdf: 1094479 bytes, checksum: 97b67533f29314983c7862339e30e9e6 (MD5) / PROPG - Programa de Pós-Graduação / Neste trabalho será mostrado o desenvolvimento de dois modelos de linhas de transmissão, baseados em elementos discretos de circuitos, que fornecem respostas diretamente no domínio do tempo e nas fases. Os dois modelos propostos partem da hipótese de que um pequeno segmento de linha de transmissão pode ser representado por um circuito . Hipótese esta já validada para linhas monofásicas por diversos autores, e que neste trabalho será utilizada para representar pequenos segmentos de linhas bifásicas e trifásicas. Deste modo, tais linhas serão representadas por uma grande quantidade de blocos (constituídos de elementos discretos de circuitos que representam um pequeno segmento de linha) conectados em cascata. No primeiro modelo proposto, válido para representar linhas idealmente transpostas, as fases de cada um dos pequenos segmentos de linha são separados em seus modos de propagação, e as correntes e tensões são calculadas no domínio modal. No entanto a conversão fase-modo-fase está inserida nas equações de estado que descrevem as correntes e tensões ao longo da linha, sendo que não há a necessidade do usuário do modelo conhecer a teoria de representação de linhas no domínio modal. Uma vez que o modelo não usa explicitamente o processo de decomposição modal, neste trabalho o mesmo será considerado como sendo um modelo desenvolvido no domínio das fases sem o uso explícito da teoria de decomposição modal. Este modelo pode ser utilizado para representar linhas que podem ter suas fases desacopladas por matrizes reais e invariáveis em relação à frequência. A representação de pequenos segmentos de linhas por elementos discretos de circuitos também foi aplicada em linhas bifásicas e trifásicas sem plano de simetria vertical. Neste caso, devido ao fato de que as matrizes... / This paper will show the development of two models of transmission lines, based on discrete circuit elements, which provide answers directly in the time domain and phase. The two proposed models start from the assumption that a small segment of transmission line can be represented by a -circuit, this hypothesis has already been validated for single-phase by several authors and this work will be used to represent small segments of lines biphasic and triphasic. Thus, these lines will be represented by a large number of blocks (consisting of discrete circuit elements that represent a small segment of the line) in cascade. In the first model, valid for ideally transposed lines represent the phases of each small line segments are separated into their modes of propagation and the currents and voltages are calculated in the modal domain. However the conversion phase-mode-phase is inserted into the state equations describing the currents and voltages along the line being that there is no need for the user the model to know representation theory of modal lines. Since the model does not explicitly use modal decomposition process, this paper it will be considered to be a model developed in the field of the phases without the explicit use of modal decomposition theory. This model can be used to represent lines that may have decoupled phases for real matrices and invariant with respect to frequency. The representation of small line segments by discrete circuit elements has also been applied in biphasic and triphasic lines without vertical symmetry plane. In this case, due to the fact that the matrices that separate line in their modes of propagation are not real and invariant with respect to frequency, the model was developed directly in the field of the phases without the use of modal decomposition matrices

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