Graduate Thesis Or Dissertation
 

Digital simulation of a self-excited cumulative compound direct-current generator with variable load

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/3197xq02m

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  • This thesis develops a simulation model for a cumulative connected compound direct-current generator to varify the operation of this machine under conditions of slowly and rapidly changing loads. The application of this simulation method will contribute to more exact modeling of power system components. The accuracy gained is in the area of magnitude and time of response of the d-c generator and other systems with which it is a component for simulation. The simulation uses a table look-up method for the representation of the series field and the armature winding. The first inductance is called subtransient and it represented the effective inductance over a specified length of time called the time of influence." The second inductance is used after the time of influence has elapsed, and is called the transient inductance. The shunt field representation is in terms of a subtransient inductance, transient inductance and a time of influence of the subtransient inductance. The mathematical representation of these parameters is expressed as a linear function of the total resistance in the shunt field circuit, The simulation of the nonlinear generator was programmed in Fortran IV. The program for simulation was based upon an iterative solution to facilitate the integration procedures and the nonlinear component representations. Test data are compared with the simulation output for eight different conditions. The comparable results for slowly changing load conditions indicated an extremely close agreement. The rapidly changing load tests indicated similar agreement except near the beginning of the transient condition where the deviation exceeded 5%. The use of d-c machines as control components require the increased accuracy of this method for digital control and simulation.
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file details MaraqaAbdelM1971.pdf 2017-08-14 Pubblico Scaricare