📄 smeqvec6.mdl
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Multiplication "Matrix(K*u)"
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Annotation {
Name "The synchronous machine is running at no lo"
"ad at or close to synchronous speed when connected to an infinite\nbus. The "
"transients occurring during the synchronization process will depend on the in"
"itial state defined by the\nexcitation no-load voltage Ef, the speed, and the"
" phase (torque) angle.\nOnce synchronized, the machine is slowly loaded: firs"
"t the real power absorbed P is ajusted by ramping the input torque\n(negative"
"ly for generator operation and positively for motor operation); then the reac"
"tive power absorbed Q is adjusted by \ncontrolling the voltage vf applied to "
"the field (increasing the field and then weakening it in order to operate in "
"over- and \nunder-excited modes). Because of the slow ramping of these inputs"
", the machine system is in quasi equilibrium and is\nessentially in steady st"
"ate at every loading condition. As a consequence, steady-state characteristic"
"s of the synchronous\nmachine can be obtained such as V_curves. Note that the"
" system becomes unstable if the field excitation reaches a\nspecific low thre"
"shold that depends on the established active load P.\n"
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Annotation {
Name "SYNCHRONOUS MACHINE AGAINST AN INFINITE BUS"
" "
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"'SPEED versus ANGLE'),figure(2),plot(t,iff,'-g'),grid,title('FIELD CURRENT ve"
"rsus TIME'),\nfigure(3),plot(t,ia,'-r'),grid,title('STATOR CURRENT MAGNITUDE "
"versus TIME'), \nfi"
"gure(4),plot(iff,ia,'-b'),grid,title('V CURVES'),xlabel('Field current'),ylab"
"el('Stator current'), \nfigure(5),plot(P,Q"
",'-r'),title('Q versus P CURVES') "
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