Q3. A 30 line is 100 km transmission line is delivering 100MW, 0.8 p.f. lag at 132KV. Each conductor has a resistance of 0.2 Q/km, reactance 0.5 /km and admittance 5x106 mho/km. If the load is balanced and leakage is neglected, calculate the sending end voltage, sending end power factor, efficiency, regulation of the transmission line using nominal "II" (pi) model.
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A: It is given that: l=300kmf=60HzL=0.36 mHkm per phaseC=0.0115 μFkmVR=500 kVPR=800MWcosϕ=0.9
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Q: 2) A 200 km long transmission line reactant was given as x=0.25 N / km and shunt admittance as…
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Q: Q3/ A 3-phase, 50HZ, 150 km line has a resistance, inductive reactance and capacitive shunt…
A: Total resistance 'R' per phase of the line, R=0.1*150 =15Ω Total inductive reactance 'XL'…
Q: Q4. A 3-phase, 60 Hz, 500-kV transmission line is 300 km long. The line inductance is 0.97 mH/km per…
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A: i) Nominal T method- Total resistance, R=0.275*160 =44Ω Total inductive reactance, XL=0.5625*160…
Q: Q3. A 30 line is 100 km transmission line is delivering 100MW, 0.8 p.f. lag at 132kV. Each conductor…
A: Q3) A 3-ph line has, Line length= 100 km Receiving end power (Pr)= 100 MW at 0.8 lagging…
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Q: Q3/ A 3-phase, 50HZ, 150 km line has a resistance, inductive reactance and capacitive shunt…
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Q: A bundled 500kv, 60Hz three phase completely transposed overhead line having three ACSR…
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Q: Q5: A 3-phase, 50Hz, 150 km line has a resistance, inductive reactance and capacitive shunt…
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Q: A 3-ph, 50 Hz, 150 km line has resistance, inductive reactance and capacitive admittance of 0.1, 0.5…
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Q: . Sending end current
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Q: Problem 3 - A 500-kV, 300-km, 60-Hz three-phase overhead transmission line, assumed to be lossless,…
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Q: Q3. A 30 line is 100 km transmission line is delivering 100MW, 0.8 p.f. Iag at 132KV. Each conductor…
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Q: Q4. A 3-phase, 60 Hz, 500-kV transmission line is 300 km long. The line inductance is 0.97 mH/km per…
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Q: Question: A three-phase, 60-Hz, completely transposed 345-kV, 200-km line has line constants: z=…
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Q: Q3. A three-phase, 50 Hz, completely transposed 345 kV, 200 km line has two conductors per bundle…
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Q: km, and C=8.86nF/km. At full load, the line delivers 250MW at 0.9 pf lagging and 230 kV. Using the z…
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- A 40-km, 220-kV, 60-Hz, three-phase overhead transmission line has a per-phase resistance of 0.15/km, a per-phase inductance of 1.3263 mH/km, and negligible shunt capacitance. Using the short line model, find the sending-end voltage, voltage regulation, sending-end power, and transmission line efficiency when the line is supplying a three-phase load of (a) 381 MVA at 0.8 power factor lagging and at 220 kV and (b) 381 MVA at 0.8 power factor leading and at 220 kV.A single-phase overhead transmission line consists of two solid aluminum conductors having a radius of 3 cm with a spacing 3.5 m between centers. (a) Determine the total line inductance in mH/m. (b) Given the operating frequency to be 60 Hz, find the total inductive reactance of the line in /km and in/mi. (c) If the spacing is doubled to 7 m, how does the reactance change?A three-phase power of 460 MW is transmitted to a substation located 500 km from the source of power. With VS=1. per unit, VR=0.9 per unit, =5000 km, Zc=500, and =36.87, determine a nominal voltage level for the lossless transmission line based on Eq. (5.4.29) of the text. Using this result, find the theoretical three-phase maximum power that can be transferred by the lossless transmission line.
- The 500-kV, 60-Hz, three-phase line in Problems 4.20 and 4.41 has a 180-km length and delivers 1600 M W at 475 kv and at 0.95 power factor leading to the receiving end at full load. Using the nominal circuit, calculate the (a) ABCD parameters, (b) sending-end voltage and current, (c) sending-end power and power factor, (d) full-load line losses and efficiency, and (e) percent voltage regulation. Assume a 50C. conductor temperature to determine the resistance of this line.A three-phase overhead transmission line is designed to deliver 190.5 M VA at 220 kV over a distance of 63 km, such that the total transmission line loss is not to exceed 2.5 of the rated line MVA. Given the resistivity of the conductor material to be 2.84108-m, determine the required conductor diameter and the conductor size in circular mils. Neglect power losses due to insulator leakage currents and corona.A small manufacturing plant is located 2 km down a transmission line, which has a series reactance of 0.5/km. The line resistance is negligible. The line voltage at the plant is 4800V(rms). and the plant consumes 120kW at 0.85 power factor lagging. Determine the voltage and power factor at the sending end of the transmission line by using (a) a complex power approach and (b) a circuit analysis approach.
- In three-phase short transmission line with end-of-line interphase voltage UR = 31,5kV , from the end of the line active power absorbed PR = 9000 kW, end of line power factor is cosφ = 0,70 (end) and the length of the line is l = 20km, The resistance of the line per km is R'= 0,125 Ohm/km, the reactance per km is X'= 0,375 Ohm/km.With the help of given information; a) Calculate the current drawn from the line (IR) as a phasor. b) Calculate the line-to-line-neutral voltage (VS) as a phasor, determine the effective line-to-line voltage (US) Calculate its value. c) Calculate the line head power factor, active and reactive power drawn from the line head, d) Draw the phasor diagram of the system. ..The length of a transmission line is (1000/3) kilometers. For this transmission line r=0.15 ohm/km x=0.8 Ohm/km y=5 * 10^-6 S/km given in the form. At the end of the line (36) MW is drawn and the end-of-line voltage is (220) kV. power factor: 0.95 (back) a. Assuming the line as a short line, calculate the VS and IS values with their angles. b. A, B, C, D by accepting the line as a mid-length line and using the "T" model approach. Calculate the parameters (Vs Is calculation is not needed) C. Calculate only parameter A, assuming the line as a long line.A 500 kV, 60 Hz uncompensated three-phase transmission line is 500 km long. The line has three ACSR 1113-kcmil (Finch) conductors per phase with parameters Current carrying capability of single ACSR 1113-kcmil (Finch) conductor is 1,110 A. Calculate the theoretical maximum (steady state stability limit) real power that this line can deliver and compare with the thermal limit of the line. Assume VS = VR = 1.0 per unit and unity power factor at the receiving end.
- Given a three-phase load of 125 MW at power factor of 0.8 lagging, operating at 69kV, with a transmission line efficiency of 97% and voltage regulation of 95%, and the line length of 50 km, design a transmission line system and determine the best conductor configuration, conductor resistance and inductance, and conductor radius values to achieve the efficiency and voltage regulation set. Assume a two-bundled conductor configuration with GMR of 0.0496 m and bundle spacing of 30 cm.A 40-km, 220-kV, 60-Hz three-phase overhead transmission line has a per-phase resistanceof 0.15 W/km, a per-phase inductance of 1.3263 mH/km, and negligible shunt capacitance.Using the short line model, find the ABCD parameters. The sending-end voltage, voltageregulation, sending-end power, and transmission line efficiency when the line is supplyinga three-phase load of: (a) 381 MVA at 0.8 power factor lagging and at 220 kV, (b) 381MVAat 0.8 power factor leading and at 220 kV. How does the load type (capacitive or inductive)affect the sending voltage magnitude, voltage regulation and efficiency?Given a three-phase load of 125 MW at power factor of 0.8 lagging, operating at 69kV, with a transmission line efficiency of 97% and voltage regulation of 95%, and the line length of 50 km, design a transmission line system and determine the best conductor configuration,conductor resistance and inductance, and conductor radius values to achieve the efficiencyand voltage regulation set. Assume a two-bundled conductor configuration with GMR of 0.0496 m and bundle spacing of 30 cm.