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Unformatted text preview: Power Systems I Multimachine Systems & Each synchronous machine is represented by a constant voltage source behind the direct axis transient reactance & The input powers are assumed to remain constant & Using the prefault voltage, all loads are converted to equivalent admittances to ground and are assumed to remain constant & Damping or asynchronous powers are ignored & The mechanical rotor angle of each machine coincides with the electrical angle of the excitation voltage source Power Systems I Modeling Steps & Solve the initial load flow and obtain the initial bus voltage magnitude and phase angle & Calculate the machine currents prior to the disturbance & Obtain the voltages behind the transient reactances & Convert all loads to equivalent admittances * * i mach i mach i mach V S I = i mach d i mach i mach I X j V E + = 2 2 * i i i i i i V Q j P V S y = = Power Systems I Modeling Steps & Combine the generator models with the networks bus admittance matrix with converted loads...
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This note was uploaded on 11/27/2011 for the course EEL 4213 taught by Professor Thomasbaldwin during the Spring '11 term at FSU.
 Spring '11
 THOMASBALDWIN
 Volt

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