Question

A 33 kV, three-phase, 50 Hz line of resistance 2 Ω/ph and reactance j9 Ω/ph supplies...

A 33 kV, three-phase, 50 Hz line of resistance 2 Ω/ph and reactance j9 Ω/ph supplies a 33 kV/440 V transformer having negligible resistance and reactance of j2 Ω/ph referred to 33 kV. The transformer supplies a 440 V feeder of resistance 0.01 Ω/ph and reactance j0.007 Ω/ph. If VR, the receiving-end voltage, is 440 V, calculate VS, the sending-end voltage, when the three-phase load delivered is 440 kW at unity power factor.          

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
Use MATLAB: A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a series reactance...
Use MATLAB: A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a series reactance of 6.08 Ohms as referred to its high-voltage terminals. The transformer is supplying a load of 375 MVA, with 0.89 power factor lagging at a voltage of 24 kV (line-to-line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.17 + j 2.2 Ohms connected to its high-voltage terminals. The total load in the system remains constant at 375 MVA....
A three-phase 12-mile, 50 kV (line), 60 Hz line has a resistance of 0.1, capacitance of...
A three-phase 12-mile, 50 kV (line), 60 Hz line has a resistance of 0.1, capacitance of 0.01 and inductance of 1 mH/km. The load at the receiving end of the line absorbs 10 MVA at 90 percent of rated voltage. Calculate: ABCD parameters of the line The sending-end voltage if the load power factor is 0.8 lagging. The sending-end line voltage, line current and complex power if the load has a power factor of 0.7 leading.
A 100 MVA, 13.2 kV three phase generator (G) having a synchronous reactance of 10% is...
A 100 MVA, 13.2 kV three phase generator (G) having a synchronous reactance of 10% is connected to a three phase Y-Y transformer T1 which feeds a 132 kV 10 miles transmission line having an impedance per phase of 2 + j5 ?/mile. At the receiving end of the transmission line is a Y-Y step down transformer T2. Three loads are connected to the secondary side of the transformer T2. Loads are as follows: Load#1 40 MVA at 0.8 pf...
a) A three phase transformer rated at 30 MVA 10 kV(Δ)/1 kV(Y) is supplying a load...
a) A three phase transformer rated at 30 MVA 10 kV(Δ)/1 kV(Y) is supplying a load at the low voltage side. The load absorbs 5 MVA, 0.7 power factor lagging at line to line voltage 0.9 kV. The transformer has an equivalent reactance 0.05 Ω/phase. Assuming 10 MVA and 1 kV as base value, draw the per unit diagram for the system. Find the Line to Line voltage at the primary side of the transformer. b) A three-phase synchronous generator...
A 20 kVA single phase transformer 4800/480V has primary resistance and reactance of 5Ω and 15Ω...
A 20 kVA single phase transformer 4800/480V has primary resistance and reactance of 5Ω and 15Ω respectively, while the resistance and reactance of secondary winding is 0.1Ω and 0.15 Ω respectively. Calculate: (i) The parameter referred to primary side of transformer and draw the equivalent circuit (ii) The approximate value of secondary voltage at full load power factor of 0.8 lagging if 4.8kV primary supply
A 42 kVA three-phase synchronous generator with line voltage 4.16 kV at a frequency of 60...
A 42 kVA three-phase synchronous generator with line voltage 4.16 kV at a frequency of 60 Hz, is connected in star configuration. The generator has a winding whose armature resistance is 0.8 Ω and a synchronous reactance of 7.4 Ω, both per phase. Determine the voltage regulation when the power factor is 0.600 lagging.
A 250 km , three- phase , 50 Hz transmission line is delivering 25 MVA at...
A 250 km , three- phase , 50 Hz transmission line is delivering 25 MVA at 0.8 lagging power factor to a balanced load at 132 KV ( line-line) . The conductor resistance is 0.11 ohm/km . The line inductance per phase is 1.24 mH/km and the line to neutral capacitance is given as 9.4 x 10 – 9 F/km. a ) find the nominal – Л representation. b) find the sending end voltage , VS by nominal – Л...
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 100 km long, three phase 50 hz transmission line has resistance per phase per km...
A 100 km long, three phase 50 hz transmission line has resistance per phase per km of 0.1 ohms, reactance per phase per km of 0.5 ohms, susceptance per phase per km of 10 x 10-6 siemens. If the line supplies a load of 20 MW at 0.9 pf lagging at 66 KV at the receiving end, calculate the regulation and efficiency of the line using the following assumptions: a. nominal pi vector solution b. nominal T vector solution c....
A 3-phase, 5 MVA, kV, 60 Hz synchronous machine has a synchronous reactance of 10 ohms...
A 3-phase, 5 MVA, kV, 60 Hz synchronous machine has a synchronous reactance of 10 ohms per phase. The machine is connected to kV, 60 Hz bus and is operated as synchronous condenser (synchronous motor at no-load condition) a. For normal excitation (excitation voltage terminal voltage), find the line current. Draw the phasor diagram b. If the excitation is increased to 150% of the normal excitation, find the line current and reactive power delivered or absorbed by the bus. Draw...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT