A 275kV, 50HZ three-phase transmission line is 110 km long. The line is supplying a three-phase load of 280MVA at 0.85 pf lagging at 275kV. The line comprises the following characteristics per-phase, resistance 0.0350/km, inductance 0.85mH/km and capacitance 0.0112 pF/km. i. Calculate the sending end voltage based on ABCD constant of the transmission line (T- network). ii. Determine the voltage regulation.
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A: According to question: Using nominal 'T' approximation: The sending end voltage is calculated as…
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Q: . Sending end current
A: As per Bartleby policy we can answer one part at a time. All parameters are per unit length…
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Q: Please all parts.
A: We are authorized to answer three subparts at a time since you have not mentioned which part you are…
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Q: 2. A balanced load of 30 MW is supplied at 132 kV, 50 Hz and 0-85 p.f. lagging by means of a…
A: As per our guidelines we are supposed to answer only one question. Kindly repost other questions as…
Q: Solve this math : A 210-km, 192-KV, 60 Hz three-phase line has a positive-sequence series impedance…
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Q: Question 4 If the phase parameters for this 50HZ, 40km transmission line are R=20, L=10mH, and…
A: R= 2 ohms L = 10 mH and C = 8000 μF, f = 50 Hz XL = 2πfL = 2 x 3.14 x 50 x 10 x 10 -3 = 3.14j ohms…
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- Consider a long radial line terminated in its characteristic impedance Zc. Determine the following: (a) V1/I1, known as the driving point impedance. (b) | V2 |/V1|, known as the voltage gain, in terms of al. (c) | I2 |/| I1 |, known as the current gain, in terms of al. (d) The complex power gain, S21/S12, in terms of al. (e) The real power efficiency, (P21/P12)=, terms of al. Note: 1 refers to sending end and 2 refers to receiving end. (S21) is the complex power received at 2; S12 is sent from 1.A 30-km, 34.5-kV, 60-Hz, three-phase line has a positive-sequence series impedance z=0.19+j0.34/km. The load at the receiving end absorbs 10 MVA at 33 kV. Assuming a short line, calculate: (a) the ABCD parameters, (b) the sending-end voltage for a load power factor of 0.9 lagging, and (c) the sending-end voltage for a load power factor of 0.9 leading.Calculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three-phase line in Problem 4.18. Also calculate the line-charging current in kA/phase if the line is 110 km in length and is operated at 230 kV. Neglect the effect of the earth plane.
- 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?A 3 phase, 50 Hz, 150 km line has a resistance, inductive reactance and capacitive shunt admittance of 0.1Ω, 0.5Ω, and 3 x 106 S per km per phase. If the line delivers 50MW at 110kV and 0.8 pf lagging, Assume a nominal phi circuit for the line determine: a. Sending end current b. Line value of the sending end voltage c. Transmission efficiency d. Voltage regulation e. Sending end power factorA 230 kV, three-phase transmission line has a per phase series impedance of z = (0. 05 + j0.45) ΩΩ per Km and a per phase shunt admittance of y = j(3.4×10−6×10−6) siemens per km. The line is 80 km long. Using the nominal ππ 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 kV.(c) 306 MW, unity power factor at 220 kV.
- 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.A bundled 500kv, 60Hz three phase completely transposed overhead line having three ACSR 1113kcmil(556.50mm) conductors per bundle,with 0.5m between conductors in the bundle. The horizontal phase spacings between bundle centers are 10,10,and 20m.Calculate the capacitance -to- neutral in F/m. and the admittance -to-neutral in S/km.Question 1. The impedance of a 150 km long transmission line is ? = 0.06 + ?0.48 ?/??, and the shunt admittance value is given as ? = ?3.33?10−6 ?/??. Under 250 kV voltage at the end of the line A power of 250 MW is drawn with a reverse power factor cos ? = 0.95. Nominal π equivalent using the circuit; a) Find the ABCD parameters. b) Find the voltage, current and power factor per line.
- A 230-kV, three-phase transmission line has a per phase series impedance of z = 0.05+j0.45 Ω per Km and a per phase shunt admittance of y = j3.410-6 siemens per km. The line is 80 km long. Using the nominal π model, determine(a) The transmission line ABCD constants. Find the sending end voltage andcurrent, voltage regulation, the sending end power and the transmissionefficiencywhen the line delivers(b) 200 MVA, 0.8 lagging power factor at 220 kV.(c) 306 MW, unity power factor at 220 kV.A short three phase transmission line of parameters R-0.4Ω and X=0.4Ω is delivering 2000kVA to a load at a pf of 0.8 lagging at the receiving enf=d of the line.if the load voltage is 3000 V, determine the voltage regulation and efficiency of the line.A three-phase transmission line is 160 km long and supplies a load of 12 MW at 0.85 powerfactor lagging at 80 kV, 50 Hz. Each conductor has a resistance of 0.275 Ω / km, an inductivereactance of 0.5625 Ω / km and a capacitance to neutral of 0.008625 µF / km. Calculate the line-to-line sending end voltage and the sending end current, using: i. The nominal T method.ii. The nominal Π method. If the sending end voltage remains constant, estimate the approximate rise in voltage at thereceiving end when the load is switched off. Hence calculate the per unit voltage regulation ofthe transmission line.