Homework Answers
Add Answer to:
A three-phase transmission line is 200 km long. lt has a total series impedance of 25+j110)Ω...
PROBLEM: A 230-kV, 50 Hz, three-phase transmission line is 120 km long. The line has a per phase ...
PROBLEM: A 230-kV, 50 Hz, three-phase transmission line is 120 km long. The line has a per phase series impedance of z-0.05 +j0.45 Ω per km, and a per phase shunt admittance of y 3.4x10-6 Siemens per km. The line delivers (at the receiving end) 200 MVA, 0.8 lagging power factor at 220 kV. Now consider two cases: A- Assume that shunt parameters of the transmission line are ignored (i.e. even if this is a medium length transmission line, under...
A 50-Hz, three-phase transmission line is 300 km long. It has a total series impedance of...
A 50-Hz, three-phase transmission line is 300 km long. It has a total series impedance of 23 + j75 Ohms and a shunt admittance of j500 µS. It delivers 50 MW at 220 kV, with a power factor of 0.88 lagging. Find the voltage at the sending end using: 1) the short line approximation. 2) the medium-length approximation. 3) the long line equation. How accurate are the short- and medium-length approximations for this case?
A 230-kV, three-phase transmission line has a per phase series impedance of z = 0.05j0.45 2...
A 230-kV, three-phase transmission line has a per phase series impedance of z = 0.05j0.45 2 per km and a per phase shunt admittance ofy = j3.4 x 10-6 siemens per km. The line is 80 km long. Using the nominal r model, determine (a) The transmission line ABCD constants. Find the sending end voltage and current, voltage regulation, the sending end power and the transmission efficiency when the line delivers (b) 200 MVA, 0.8 lagging power factor at 220...
A 230kV three phase transmission line has a per phase series impedance of z=0.05+j0.45ohms per km...
A 230kV three phase transmission line has a per phase series impedance of z=0.05+j0.45ohms per km and a per phase shunt admittance of y= j3.4x10^-6 siemens per km. The line is 80km long. Using the medium line pi model: (a) Determine the transmission line model constants A, B, C, and D (b) Find the sending end (generating) voltage, current and power when the line delivers to a load of 1. 200 MVA with 0.8 lagging power factor at 220 kV...
Question: A three-phase, 60-Hz, completely transposed transmission line has a length of 100-km and has a...
Question: A three-phase, 60-Hz, completely transposed transmission line has a length of 100-km and has a series impedance per phase of (0.25+j0.85) ohms/mile and shunt admittance of 5.0*10^-5 Siemens/mile. The transmission line delivers 150 MW at 0.85 lagging power factor to a load connnected to its receiving end. The line-to-line voltage at the receiving end is 138-kV. Note: The Medium Length Line method should be used since it is used for distances between 50 miles to 150 miles. Determine the...
Q2. Draw the nominal π circuit that is used to represent the medium-length transmission line model with total series impedance Z and total shunt admittance Y. Then derive the equations to express the...
Q2. Draw the nominal π circuit that is used to represent the medium-length transmission line model with total series impedance Z and total shunt admittance Y. Then derive the equations to express the ABCD parameters (a) 20% (b)A 200 km, 230 kV, 50 Hz three-phase overhead transmission line has a positive-sequence series impedance z (0.08 + j0.48) Ω/km, and a positive-sequence shunt admittance y-j3.33 x 10T° S/km. At full load, the line delivers 250 MW at 0.99 power factor lagging...
QUESTIONS 1- A 69-kV, three-phase transmission line is 20 km long. The line has a per...
QUESTIONS 1- A 69-kV, three-phase transmission line is 20 km long. The line has a per phase series impedance of 0,120 + 10,4325 per km. Detemine the sending end voltage, voltage regulation, the sending end power, and the transmission efficiency when the line delivers (a) 60 MVA, 0.8 lagging power factor at 60 kV. (b) 110 MW, unity power factor at 60 kV
2) A 50 Hz transmission line 300 km long has a series impedance of 40 j125...
2) A 50 Hz transmission line 300 km long has a series impedance of 40 j125 ohms and a total shunt admittance of 103 S. The load draws 500 MW at 220 kV with 0.8 pf lagging. Find the sending end voltage using (a) Short line approximation and (b) Nominal π method.
A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence series impedance ?=0.08+?0.48 Ω/km and a positive-sequence...
A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence
series impedance ?=0.08+?0.48 Ω/km and a positive-sequence shunt
admittance ?=?3.33×10−6 S/km. At full load, the line delivers 250
MW at 0.99 pf lagging and at 220 kV. Using the nominal ? circuit,
calculate:
a. The ABCD parameters,
b. The sending-end voltage and current,
c. The percent voltage regulation.
4. A 500 km, 500kV,60 Hz three-phase transmission line has a positive sequence series impedance z...
4. A 500 km, 500kV,60 Hz three-phase transmission line has a positive sequence series impedance z =j 0.38.2/km and a shunt admittance y =j 4.0 x 10-6S/km. Line losses are neglected. a. Calculate the line's characteristic impedance Zc, the propagation constant y and the exact ABCD parameters of the line... b. Calculate the surge impedance loading (SIL) in MW and the maximum power that the line can deliver at rated voltage C. At full load the line delivers 1000 M...
PROBLEM: A 230-kV, 50 Hz, three-phase transmission line is 120 km long. The line has a per phase series impedance of z-0.05 +j0.45 Ω per km, and a per phase shunt admittance of y 3.4x10-6 Siemens per km. The line delivers (at the receiving end) 200 MVA, 0.8 lagging power factor at 220 kV. Now consider two cases: A- Assume that shunt parameters of the transmission line are ignored (i.e. even if this is a medium length transmission line, under...
A 230-kV, three-phase transmission line has a per phase series impedance of z = 0.05j0.45 2 per km and a per phase shunt admittance ofy = j3.4 x 10-6 siemens per km. The line is 80 km long. Using the nominal r model, determine (a) The transmission line ABCD constants. Find the sending end voltage and current, voltage regulation, the sending end power and the transmission efficiency when the line delivers (b) 200 MVA, 0.8 lagging power factor at 220...
Q2. Draw the nominal π circuit that is used to represent the medium-length transmission line model with total series impedance Z and total shunt admittance Y. Then derive the equations to express the ABCD parameters (a) 20% (b)A 200 km, 230 kV, 50 Hz three-phase overhead transmission line has a positive-sequence series impedance z (0.08 + j0.48) Ω/km, and a positive-sequence shunt admittance y-j3.33 x 10T° S/km. At full load, the line delivers 250 MW at 0.99 power factor lagging...
QUESTIONS 1- A 69-kV, three-phase transmission line is 20 km long. The line has a per phase series impedance of 0,120 + 10,4325 per km. Detemine the sending end voltage, voltage regulation, the sending end power, and the transmission efficiency when the line delivers (a) 60 MVA, 0.8 lagging power factor at 60 kV. (b) 110 MW, unity power factor at 60 kV
2) A 50 Hz transmission line 300 km long has a series impedance of 40 j125 ohms and a total shunt admittance of 103 S. The load draws 500 MW at 220 kV with 0.8 pf lagging. Find the sending end voltage using (a) Short line approximation and (b) Nominal π method.
A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence
series impedance ?=0.08+?0.48 Ω/km and a positive-sequence shunt
admittance ?=?3.33×10−6 S/km. At full load, the line delivers 250
MW at 0.99 pf lagging and at 220 kV. Using the nominal ? circuit,
calculate:
a. The ABCD parameters,
b. The sending-end voltage and current,
c. The percent voltage regulation.
4. A 500 km, 500kV,60 Hz three-phase transmission line has a positive sequence series impedance z =j 0.38.2/km and a shunt admittance y =j 4.0 x 10-6S/km. Line losses are neglected. a. Calculate the line's characteristic impedance Zc, the propagation constant y and the exact ABCD parameters of the line... b. Calculate the surge impedance loading (SIL) in MW and the maximum power that the line can deliver at rated voltage C. At full load the line delivers 1000 M...
Most questions answered within 3 hours.
-
The extent to which assets are financed by borrowed funds and
other liabilities is indicated by:...
asked 3 minutes ago -
Explain in detail
Germany is the fifth largest economy
explain what goods and services Germany specializes...
asked 18 minutes ago -
The density of platinum is 21.45 g/mL. If a cube of platinum
with a mass of...
asked 23 minutes ago -
Accounts Receivable
Sales
A/R Posting
Extended Sales Invoice
Packing Slip
Compare invoice to packing slip 2...
asked 26 minutes ago -
Michaella, age 23, is a full-time law student and is claimed by
her parents as a...
asked 27 minutes ago -
Why are polymers not typically casted into products?
asked 44 minutes ago -
When rolling a die 129 times, what is the probability of rolling
a 6 no more...
asked 1 hour ago -
4. A call option currently sells for $7.75. It has a strike
price of $85 and...
asked 49 minutes ago -
1.
You need to prepare 10.0 liters of an acid aqueous solution with a
pH of...
asked 52 minutes ago -
Along an aggregate supply curve, if the level of output is less
than the natural level...
asked 53 minutes ago -
By 2025, annual consumption in emerging markets will total $30
trillion and contribute more than ________...
asked 58 minutes ago -
At what point does reformation cease to be a viable option for
those who are oppressed...
asked 1 hour ago