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dc.contributor.supervisor Gole, Aniruddha (Electrical and Computer Engineering) en
dc.contributor.author Banitalebi Dehkordi, Ali
dc.date.accessioned 2010-04-08T21:37:09Z
dc.date.available 2010-04-08T21:37:09Z
dc.date.issued 2010-04-08T21:37:09Z
dc.identifier.uri http://hdl.handle.net/1993/3935
dc.description.abstract This thesis advances the state of the art in modeling electric machines in electro-magnetic transient simulation programs, particularly in real-time digital simulators. A new tool, developed in this thesis, expands the application of real-time digital simulators to closed-loop testing of protection relays designed to protect synchronous machines during internal faults. To evaluate the inductances of synchronous machines, a winding function approach was developed in this thesis which is capable of taking into account both the actual distribution of windings and the shape of the pole-arc. Factors such as MMF drop in the iron and effects of slots are compensated by evaluating the effective permeance function of the machine using experimentally measured values of d-, q- and 0- axis inductances. In this winding function approach, the effects of magnetic saturation are also included by considering the actual distribution of magneto-motive force in each loading condition of the machine. The inductances of an experimental machine are evaluated using this approach and validated using the finite-element method and laboratory measurements. This thesis also proposes an embedded phase-domain approach for time-domain simulation of the machine model in electromagnetic transients programs. The approach significantly improves the numerical stability of the simulations. Special numerical techniques are introduced, which speed up the execution of the algorithm as needed for real-time simulation. The machine model is validated in healthy and faulted conditions using simulations and laboratory experiments. Effects of damper grid representation on simulating turn-to-turn faults are investigated. The capability of this new real-time synchronous machine model in closed-loop testing of synchronous machines ground- faults protection relays is clearly demonstrated. en
dc.format.extent 5763128 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject electric machine en
dc.subject real-time digital simulation en
dc.subject electro-magnetic transient programs en
dc.subject digital transient network analyzer en
dc.subject protection relay en
dc.subject closed-loop testing en
dc.subject winding function approach en
dc.subject permeance en
dc.subject saturation en
dc.subject damper grid en
dc.subject internal faults en
dc.subject harmonics en
dc.title Improved models of electric machines for real-time digital simulation en
dc.type info:eu-repo/semantics/doctoralThesis
dc.degree.discipline Electrical and Computer Engineering en
dc.contributor.examiningcommittee Maguire, Trevor (Electrical and Computer Engineering) Graham, Peter (Computer Science) Menzies, Robert (Electrical and Computer Engineering) Harley, Ronald (School of Electrical and Computer Engineering, Georgia Institute of Technology) en
dc.degree.level Doctor of Philosophy (Ph.D.) en
dc.description.note May 2010 en


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