A 60-Hz, 230-mile, three-phase overhead transmission line has a series impedance z = 0.8431279.04° 0/mi and a shunt admittance y = 5.105 x 10-6290° S/mi. The load at the receiving end is 174 MW at unity power factor and at 215 kV. Using per-unit calculations, determine the sending-end line-to-line voltage (in kV) and line current (in A). (Enter the magnitudes. Use a base of 174 MVA and 215 kv.) voltage 154.2 x kv current A

A 60-Hz, 230-mile, three-phase overhead transmission line has a series impedance z = 0.8431279.04° 0/mi and a shunt admittance y = 5.105 x 10-6290° S/mi. The load at the receiving end is 174 MW at unity power factor and at 215 kV. Using per-unit calculations, determine the sending-end line-to-line voltage (in kV) and line current (in A). (Enter the magnitudes. Use a base of 174 MVA and 215 kv.) voltage 154.2 x kv current A

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.33MCQ

See similar textbooks

Similar questions

i. Some reasons for adopting high transmission line voltages are to improve ------and the enhancement of. ii. The per phase power transmitted under surge impedance loading of a transmission line is given by: iii. Power transmission lines are limited in their power handling capability by the and
1) A 60-Hz, ...-km, three-phase overhead transmission line has a series impedance z = 0.8431L79.04 ohm/km and a shunt admittance y = 5.105 × 106 L90 S/km. The load at the receiving end is 125 MW at unity power factor and at 215 KVLL. Determine the voltage, current, real and reactive power at the sending end and the percent voltage regulation of the line for nominal pi network. (Please determine the length of the transmission line within the specified limits: 150-220 km. By considering the length value you determined yourself, solve the question.)
In the medium-length power transmission line model given below, since the end-of-line voltage value of the nominal-T equivalent circuit is 154 kv, find the voltage regulation value for this line and draw the phasor diagram.
A three-phase transmission line operating at 345 kV, 600 MVA, 0.95 power factor lagging. The CT ratio is 1000:5 and the VT ratio is 3000:1. Determine the CT secondary current and the VT secondary voltage.
At the end of the 8 km overhead line given in the figure below, there are two distribution transformers, one of which is 800kVA and the other is 1200kVA, operated with power coefficients of 0.6 and 0.8, respectively. The end-of-line voltage is 6kV. Find the required rated cross section and line head voltage so that the power loss on the line is less than %pk = 10.
Q4(b) The equivalent circuit of a single phase short transmission line is shown in Figure Q4(b). Here, the total line resistance and inductance are shown as lumped instead of being distributed. i) Sketch the phasor diagram and assess with by labeling the details for the A.C. series circuit shown in Figure Q4(b) for the lagging power factor at load point (Vn). ii) Summarize, what if the load change from low value to high value shown in Figure Q4(b). R XL el Vs Vn Figure Q4(b) Load
The equivalent circuit of a single phase short transmission line is shown in Figure Q4 (b). Here, the total line resistance and inductance are shown as lumped instead of being distributed. i) Sketch the phasor diagram and assess with by labeling the details for the A.C. series circuit shown in Figure Q4 (b) for the lagging power factor at load point (Vn). ii) Summarize, the impact of voltage regulation and efficiency, if the line resistance and line increases are doubled Figure Q4(b). R XL Vs Vn Figure Q4(b) Load
A 345-kV transmission line has a series impedance of (4 + j60) Q and a shunt admittance of j2 x 10-3 S. Using 100 MVA and the line voltage as base values, calculate the per-unit impedance and per-unit admittance of the line.
The 13.2 kV 50-Hz generator feeds a load over a line with (Zload) impedance Zline. Load is 800n + j500n and impedance of the line is 20 + j300 a) If the generator is directly connected to the load as given in (a), what will be the line losses? b) If the generator is connected to the load using step-up and step-down transformers as given in (b), what will be the line losses? c) How much is the increase in efficiency compared to (a) from (b)? Zline 2. (a) 1:10 10:1 Zline Tr Tr2 (b) Zload Zload
A 3-phase overhead transmission line delivers a load of 80 MW at0.8 p.f. lagging and 220 kV between the lines. Its total seriesimpedance per phase and total shunt admittance per phase are 200ohms with an angle of 80 degrees and 0.0013 mho with an angle of90 degrees per phase respectively. Using nominal-T method,determine the following:(i) A, B, C, D constants of the line(ii) Sending end voltage(iii) Sending end current(iv) Sending end power factor(v) Transmission efficiency of the line
In a three phase overhead system , each line is suspended by a string of three insulators. The voltages across top unit and the middle unit are 8KV and 11KV respectively. Calculate a) ratio of shunt capacitance to self capacitance b) line voltage c) string efficiency.
30) In a lightly loaded long distance EHV lines, line loading is and has a power factor: (A) Capacitive, lagging. (B) Capacitive, leading (C) Inductive, lagging (D) Inductive, leading. please contact me in whatsapp +962782974574