A three-phase synchronous generator was open-circuit and short-circuit tested. During an opencircuit test of the synchronous generator, rated voltage of 380 V was obtained for the field current of IfNL = 5 A while for a short-circuit test, rated current of 8 A was reached for the field current of IfSC = 6 A. The synchronous generator is connected to rated voltage of 380 V. Assuming negligible armature resistance determine: (a) internal voltage E, under rated current and power factor of 0.8 lagging; (b) for the internal voltage from (a) determine the steady-state stability limit; (c) at the steady-state stability limit in (b), determine reactive power of the generator, and generator loading in pu. Use rated power of the machine as the base.
A three-phase synchronous generator was open-circuit and short-circuit tested. During an opencircuit test of the synchronous generator, rated voltage of 380 V was obtained for the field current of IfNL = 5 A while for a short-circuit test, rated current of 8 A was reached for the field current of IfSC = 6 A. The synchronous generator is connected to rated voltage of 380 V. Assuming negligible armature resistance determine: (a) internal voltage E, under rated current and power factor of 0.8 lagging; (b) for the internal voltage from (a) determine the steady-state stability limit; (c) at the steady-state stability limit in (b), determine reactive power of the generator, and generator loading in pu. Use rated power of the machine as the base.
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A three-phase synchronous generator was open-circuit and short-circuit tested. During an opencircuit test of the synchronous generator, rated voltage of 380 V was obtained for the field current of IfNL = 5 A while for a short-circuit test, rated current of 8 A was reached for the field current of IfSC = 6 A.
The synchronous generator is connected to rated voltage of 380 V. Assuming negligible armature resistance determine:
(a) internal voltage E, under rated current and power factor of 0.8 lagging;
(b) for the internal voltage from (a) determine the steady-state stability limit;
(c) at the steady-state stability limit in (b), determine reactive power of the generator, and generator loading in pu. Use rated power of the machine as the base.
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