machine
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What is common method to supply dc to rotor ?with drawing a) supply the dc power from an external dc source to the rotor by means of slip rings .and brushes b) Supply the dc power from a special dc power source mounted directly on the shaft of the synchronous generator
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A brushless exciter circuit : A small phase current is rectified and used-3 to supply the field circuit of the exciter, which is located on the stator. The output of the armature circuit of the exciter (on the rotor) is then rectified and used to supply the field current of the main machine
what is the advantage or reasons for paralleling operation ? .a) Handling larger loads .b) Maintenance can be done without power disruption .c) Increasing system reliability d) Increased efficiency
?state condition for paralleling operation or what is paralleling condition .a) RMS line voltages must be equal b) The generators to be paralleled must have the same phase sequence .Generator output phase angles must be the same d) The oncoming generator (the new generator) must have a slightly higher operating frequency as compared to the system frequency ? what is infinite bus is apower system so large that its voltage and frequency do not vary regardless of how much real and reactive power is .drawn from or supplied to it ?What is governor effect and field current in infinite bus :Governor Control Effects The increase for governor point cause increase for output power since infinite bus the frequency and voltage doesn’t change
Field current ncreasing the field current in a synchronous generator operating in parallel with an infinite bus increases the reactive power output of the generator
What is effect governor and field current for small generation غير متصل بالشكبه متصلين بالحمل مباشر when 2 generators are operating together, an increase in governor set points on one of them .increases the system frequency .1 increases the power supplied by that generator, while reducing the power supplied by .2 the other .one What happens if the field current of G2
?is increased .The system terminal voltage is increased . The reactive power Q supplied by that generator is increased, while the reactive .2 power supplied by the other generator is decrease ? how shift power with out changing frequency and vice versa we change governor point increase for one generator and decrease for another generator to shift the frequency Increase governor in both generators
How to shift reactive power without changing in voltage terminal and vic ?versa we change field currentt increase for one generator and decrease for another generator to shift the frequency Increase field current in both generator as shown
.
A brushless exciter circuit : A small phase current is rectified and used-3 to supply the field circuit of the exciter, which is located on the stator. The output of the armature circuit of the exciter (on the rotor) is then rectified and used to supply the field current of the main machine
what is the advantage or reasons for paralleling operation ? .a) Handling larger loads .b) Maintenance can be done without power disruption .c) Increasing system reliability d) Increased efficiency
?state condition for paralleling operation or what is paralleling condition .a) RMS line voltages must be equal b) The generators to be paralleled must have the same phase sequence .Generator output phase angles must be the same d) The oncoming generator (the new generator) must have a slightly higher operating frequency as compared to the system frequency ? what is infinite bus is apower system so large that its voltage and frequency do not vary regardless of how much real and reactive power is .drawn from or supplied to it ?What is governor effect and field current in infinite bus :Governor Control Effects The increase for governor point cause increase for output power since infinite bus the frequency and voltage doesn’t change
Field current ncreasing the field current in a synchronous generator operating in parallel with an infinite bus increases the reactive power output of the generator
What is effect governor and field current for small generation غير متصل بالشكبه متصلين بالحمل مباشر when 2 generators are operating together, an increase in governor set points on one of them .increases the system frequency .1 increases the power supplied by that generator, while reducing the power supplied by .2 the other .one What happens if the field current of G2
?is increased .The system terminal voltage is increased . The reactive power Q supplied by that generator is increased, while the reactive .2 power supplied by the other generator is decrease ? how shift power with out changing frequency and vice versa we change governor point increase for one generator and decrease for another generator to shift the frequency Increase governor in both generators
How to shift reactive power without changing in voltage terminal and vic ?versa we change field currentt increase for one generator and decrease for another generator to shift the frequency Increase field current in both generator as shown
