Calculate the machine power factor, Mechanical Engineering

A 3-phase, 15-kV, 4-pole, cylindrical rotor synchronous generator is connected to a 50-Hz infinite bus. The synchronous reactance of the machine is Xs = 0.6 ohms per phase and the excitation voltage is set to E0 = 12 kV line-to-neutral. 

 a)  Draw single-phase equivalent circuit representing the machine connected to infinite bus. 

b)  Consider the machine running as a synchronous condenser.

(i)  What is the amount of active power generated by the machine? 

(ii)  Calculate the amount of current injected by the machine to the infinite bus. 

(iii)  Calculate the amount of reactive power generated by the machine. 

 Now, the excitation voltage has been reduced to 8.66 kV and the steam turbine supplies mechanical torque on the shaft such that the torque angle of the machine is equal to +30°.

 c)  Draw phasor diagram for this operating conditions showing clearly the bus voltage, the excitation voltage and the stator current. 

d)  Calculate the machine power factor.

Posted Date: 2/18/2013 2:32:39 AM | Location : United States







Related Discussions:- Calculate the machine power factor, Assignment Help, Ask Question on Calculate the machine power factor, Get Answer, Expert's Help, Calculate the machine power factor Discussions

Write discussion on Calculate the machine power factor
Your posts are moderated
Related Questions
Working of Impulse turbine: The technique in which multiple system of rotors are keyed to a common shaft, in series and the steam pressure of jet velocity is absorbed in stage

(a) At a point in a material under stress, the resultant intensity of stress across a certain plan is 100 N/mm 2 (compressive) inclined at 30 o to its normal. On another plane th

Determine minimum value of weigh to cause motion: Determine minimum value of weight W required to cause motion of block, which rests on a horizontal plane. The block weighs 3

Contents of Cast Iron: Cast Iron or CI is prepared form melting pig iron in cupola furnace or in electric furnace. This furnace offers better quality. CI contains various

In a nuclear power plant saturated steam at 30 bar enters a h.p. turbine and expands isentrophically to a pressure at which its quality is 0.841. At this pressure the steam is pass

Define O.R. and what are the applications in Industry ? A firm uses lathe, milling and Grinding machine to make two machine parts. The table below show the machining time requir

As per American welding society (AWS) Welding is defined as "a localized coalescence of metals or non-metals produced either by heating the material to suitable temperature, wi

a) An epicyclic gear have three wheels A, B and C. Wheel A has 72 internal teeth, wheel C has 32 external teeth. The wheel B gears with both A and C is carried on an arm which move

A hollow circular shaft has an internal diameter of 48 mm and an external diameter of 54 mm. Calculate the shear stress produced at the outer and inner surfaces of the shaft when t

Illustrate the Centrifugal Clutch in Detail with neat sketch ? Illustrate the Electromagnetic Clutch in Detail with neat sketch ? Illustrate the Diaphragm spring Clutch in