Question

A 50-Hz, two-pole, 825 kVA, 2300 V, three-phase synchronous machine has a synchronous reactance of 7.47...

A 50-Hz, two-pole, 825 kVA, 2300 V, three-phase synchronous machine has a synchronous reactance of 7.47 and achieves rated open-circuit terminal voltage at a field current of 147 A.

c. For a constant load power of 700 kW, write a MATLAB script to plot the terminal current as a function of field current. For your plot, let the field current vary between a minimum value corresponding to a machine loading of 825 kVA, leading power factor, and a maximum value corresponding to a machine loading of 825 kVA, lagging power factor. What value of field current produces the minimum terminal current?

Please provide MATLAB code

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A submarine has a 3-phase, Y-connected, 2- pole, 60Hz synchronous generator rated to deliver 1687.5 kVA...
A submarine has a 3-phase, Y-connected, 2- pole, 60Hz synchronous generator rated to deliver 1687.5 kVA at a FP = 0.8 lagging with a line voltage of 450-V. The machine stator resistance RS = 0.004 ?. The synchronous reactance is Xs=0.08 ?. The actual system load on the machine draws 900 kW at FP = 0.6 lagging. Assume that a voltage regulator has automatically adjusted the field current so that the terminal voltage is its rated value. Mechanical losses are...
A 125 MVA 11 kV three phase 50 Hz synchronous generator has a synchronous reactance of...
A 125 MVA 11 kV three phase 50 Hz synchronous generator has a synchronous reactance of 1.33 p.u. The generator achieves rated open circuit voltage at a field current of 325 A. The generator is connected to a network with an equivalent line-line voltage of 11 kV and an equivalent impedance of 0.17 pu on the generator base. The generator is loaded to a real power of 110 MW. a- Find the generated voltage Eaf in p.u. such that the...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected synchronous generator has a synchronous reactance,...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected synchronous generator has a synchronous reactance, Xs = 17.9, and is connected to an infinite bus at rated voltage. If the rotational and electrical losses are negligivle, what is Ia, Ef, delta, theta, Tdrive, Phasor diagram, and power flow diagram (label completely with numerical values for, A) the machine as a generator; the prime-throttle is opened and If is adjusted so that the machine delivers rated kVA, 0.8 pf lagging,...
A synchronous generator 480-V, 50-Hz, Y-connected, six-pole has a power rating of 50 kVA at pf...
A synchronous generator 480-V, 50-Hz, Y-connected, six-pole has a power rating of 50 kVA at pf 0.8 lagging. The synchronous Reactance Generator is 1.0 Ω per-phase. This Generator is connected to the 45 kW steam turbine. The friction loss and the core generators are respectively 1.5 kW and 1.0 kW. Question : Draw a Capability curves!
The 400 V, 50 kVA, 0.8 power factor leading delta connected synchronous motor has synchronous reactance...
The 400 V, 50 kVA, 0.8 power factor leading delta connected synchronous motor has synchronous reactance of 3-ohm, resistance neglected. It is supplying a 12-kW load with initial power factor of 0.86 lagging. The windage and friction losses are 2.0 kW and the core losses are 1.5 kW. Determine (a) the motor efficiency; the line current; armature current; and excitation voltage. (b) If the flux of the motor is increased by 20 percent determine the excitation voltage; armature current; and...
A three phase, 200 kW, 2300 V, 50 Hz star (wye) connected non-salient rotor synchronous motor...
A three phase, 200 kW, 2300 V, 50 Hz star (wye) connected non-salient rotor synchronous motor has a synchronous reactance of 11 Ohms per phase. When it draws 175 kW the power angle is 10 electrical degrees. Neglect the ohmic losses. a. Determine the excitation voltage per phase. b. Calculate the supply line current. c. Determine the supply power factor. d. Draw the phasor diagram. e. By what percentage should the field current be changed to minimize the line current.
A balanced, symmetrical, round-rotor, 3-phase, 60 Hz, 2-pole, 100MVA, 13.8kV, synchronous generator is being driven at...
A balanced, symmetrical, round-rotor, 3-phase, 60 Hz, 2-pole, 100MVA, 13.8kV, synchronous generator is being driven at synchronous speed. During tests, an IFNL (field current required to produced rated terminal voltage under open circuit) of 150A and an IFSC (field current required to produced rated armature current under short circuit) of 100A were obtained. Use a linear model and neglect the armature resistance for the following calculations. a) What field current is needed to maintain rated terminal voltage when the generator...
A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ, synchronous generator has a synchronous reactance...
A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ, synchronous generator has a synchronous reactance of 30W and negligible resistance. The generator is connected to an infinite bus at 6.6 KV and 60 Hz. a)Determine the excitation voltage (Ea) when the machine is delivering rated power at o.8 PF lagging. b)The field excitation current is increased by 10% without changing the power input from the prime mover. Find the stator current (Ia), the power factor and the reactive power...
A 400-k VA, 2300 230, 60-hz transformer supplies a 0.8 lagging power-factor load whose KVA Is...
A 400-k VA, 2300 230, 60-hz transformer supplies a 0.8 lagging power-factor load whose KVA Is adjustable from no load to 120 percent rated KVA. The percent resistance, percent reactance, and percent core loss are 56, 3.16, and 0.42 respectively. For 2 KVA increments of load, tabulate and plot the efficiency of the transformer from no load to 120 percent rated load. Please state the formulas clearly
A n+350-KVA 2300+n - 230+n; volt, 60-hz transformer has percent core loss , resistance and percent...
A n+350-KVA 2300+n - 230+n; volt, 60-hz transformer has percent core loss , resistance and percent leakage reactance of m+0.56 ,m+ 33 and m+5.57 respectively. For 10 increments of power-factor angle, tabulate and plot percent regulation, and efficiency. Power factor for operation between 0.5 lagging and 0.5 leading. Use Matlab n=20 m=.2
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT