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REGULATION OF 3-PHASE ALTERNATOR BY POTIER AND ASA METHODS


Posted by: smart paper boy
Created at: Friday 29th of July 2011 04:51:34 AM
Last Edited Or Replied at :Friday 29th of July 2011 04:51:34 AM
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oad current passing through either an inductive or capacitive load with zero power and tabulate the readings.
8. Conduct a Stator Resistance Test by giving connection as per the circuit diagram and tabulate the voltage and Current readings for various resistive loads.
PROCEDURE TO DRAW THE POTIER TRIANGLE (ZPF METHOD):
(All the quantities are in per phase value)
1. Draw the Open Circuit Characteristics (Generated Voltage per phase VS Field Current)
2. Mark the point A at X-axis, which is obtained from short circuit test with full load armature current.
3. ..................[:=> Show Contents <=:]



armature reaction for synchronous machine ppt


Posted by:
Created at: Sunday 18th of November 2012 10:26:59 AM
Last Edited Or Replied at :Monday 19th of November 2012 01:49:19 AM
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ppt..................[:=> Show Contents <=:]



simulated model for reverse power protection of an alternator ppt


Posted by: v nandakumar
Created at: Thursday 23rd of February 2012 12:59:55 PM
Last Edited Or Replied at :Thursday 23rd of February 2012 12:59:55 PM
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can..................[:=> Show Contents <=:]



automatic voltage regulator for alternator


Posted by: m sufyan
Created at: Tuesday 03rd of January 2012 04:32:58 AM
Last Edited Or Replied at :Friday 12th of October 2012 01:30:00 AM
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what is automatic volt..................[:=> Show Contents <=:]



ALTERNATOR BRUSHLESS TYPE


Posted by: smart paper boy
Created at: Tuesday 02nd of August 2011 06:21:56 AM
Last Edited Or Replied at :Tuesday 02nd of August 2011 06:21:56 AM
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RATING PRINCIPLE
In the separately excited system (PMG) there is separate source of exciter field power from a small permanent magnet field AC generator mounted on same shaft as the main machine. Hence the machine title is separately excited.
The permanent magnet produces and output voltage that is only dependent on speed and is independent of load condition. This constant output voltage is fed to the exciter field winding through the AVR.By comparing the main output sensed voltage with the set reference voltage the AVR decides on the proportion of permanent magnet machine output to rect..................[:=> Show Contents <=:]



SLIP TEST ON 3-PHASE ALTERNATOR


Posted by: smart paper boy
Created at: Friday 29th of July 2011 04:51:52 AM
Last Edited Or Replied at :Friday 29th of July 2011 04:51:52 AM
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urrent
=125% of 4A= 5A
THEORY:
In a salient pole alternator, the reactance of magnetic circuit along is along its quad stator axis. The alternator is driven by auxiliary prime mover at a speed slightly less than the synchronous speed under these conditions. The armature current is when the armature current mmf is in line with the field poles. The reactance by the magnetic field current is minimum. The ratio of maximum voltage to minimum current gives the direct axis impedance and the ratio of minimum voltage to maximum current gives the armature axis impedance.
PRECAUTIONS:[/b..................[:=> Show Contents <=:]



REGULATION OF 3-PHASE ALTERNATOR BY POTIER AND ASA METHODS


Posted by: smart paper boy
Created at: Friday 29th of July 2011 04:51:34 AM
Last Edited Or Replied at :Friday 29th of July 2011 04:51:34 AM
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Join the points B and D also drop the perpendicular line DE to BC, where the line DE represents armature leakage reactance drop (IX¬L)
BE represents armature reaction excitation (Ifa)...................[:=> Show Contents <=:]



Harmonic effects on synchronous generators voltage regulation


Posted by: seminar class
Created at: Friday 11th of March 2011 09:50:31 PM
Last Edited Or Replied at :Friday 11th of March 2011 09:50:31 PM
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a synchronous generator depends on the flux in the machine, the frequency or speed of rotation, and the machine’s construction. However, this voltage is not the voltage that appears at the terminals of the generator when an armature current is flowing in the machine. The difference between E and V is caused by the armature reaction and the self inductance and resistance of the armature coils.
Case Study
DESCRIPTION OF TEST:
Motor-Generator set is employed as an integral part of Power System Simulator to supply power to various loads during the performance of the test. The s..................[:=> Show Contents <=:]



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