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Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/607

Title: Transmission line modeling for the purpose of analog power flow computation of large scale power systems
Authors: St. Leger, Aaron
Keywords: Electric engineering;Electric power transmission;Analog electronic systems
Issue Date: 12-Dec-2005
Abstract: This thesis proposes methods for modeling electric power transmission lines for the purpose of analog power flow computation of power system networks. Theoretical and applicable circuit models for analog transmission lines are presented with a focus on power-flow studies which concentrates on the steady state or static behavior of electrical power transmission lines. With this approach the wave propagation and reflection is not as much of a concern as the steady state line voltages and current flows. Because of this lumped circuit equivalent line models are utilized. The primary goal is to develop a computational alternative for power system analysis that overcomes obstacles currently faced by traditional digital computation methods. Analog computation is proving to be a viable alternative and has notable advantages over digital computers. In order to contrive a practical analog emulator precise models for power system components are required. Specifically this thesis develops a realization of an electric power transmission line model for such a purpose. The transmission line model traditionally utilized in power-flow computation is a lumped parameter pi-model equivalent circuit. In digital computation the shunt elements and sometimes the series resistances are often times neglected in order to simplify the power flow equations and subsequently speed up the calculation times. Prior research in analog computation for power flow analysis also utilized these simplified line models. A fully reconfigurable pi-model is presented here for an analog computation approach. No components have been neglected resulting in a more accurate line model with fast computation times. The ability to remotely reconfigure each component on the line model makes this model universal. The design could easily be fabricated to an integrated circuit to represent a large scale network and configured to match a real world system. In addition, the model is easily expanded to form a distributed parameter line model by interconnecting multiple components in series. This allows for computational analysis of the power system states throughout the transmission line which is traditionally not done in digital power flow computation due to computational restraints.
URI: http://hdl.handle.net/1860/607
Appears in Collections:Drexel Theses and Dissertations

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