A three-phase, 765-kV, 60-Hz transposed line is composed of four ACSR 1,431,000, 45/7 Bobolink conductors per phase with flat horizontal spacing of 14 m. The conductors have a diameter of 3.625 cm and a GMR of 1.439 cm. The bundle spacing is 45 cm. The line is 400 Km long, and for the purpose of this problem, a lossless line is assumed. (a) Determine the transmission line surge impedance Ze, phase constant ß, wave length 2, the surge impedance loading SIL, and the ABCD constant. (b) The line delivers 2000 MVA at 0.8 lagging power factor at 735 kV. Determine the sending end quantities and voltage regulation. (c) Determine the receiving end quantities when 1920 MW and 600 Mvar are being transmitted at 765 kV at the sending end. (d) The line is terminated in a purely resistive load. Determine the sending end quantities and voltage regulation when the receiving end load resistance is 264.5 at 735 kV.

A three-phase, 765-kV, 60-Hz transposed line is composed of four ACSR 1,431,000, 45/7 Bobolink conductors per phase with flat horizontal spacing of 14 m. The conductors have a diameter of 3.625 cm and a GMR of 1.439 cm. The bundle spacing is 45 cm. The line is 400 Km long, and for the purpose of this problem, a lossless line is assumed. (a) Determine the transmission line surge impedance Ze, phase constant ß, wave length 2, the surge impedance loading SIL, and the ABCD constant. (b) The line delivers 2000 MVA at 0.8 lagging power factor at 735 kV. Determine the sending end quantities and voltage regulation. (c) Determine the receiving end quantities when 1920 MW and 600 Mvar are being transmitted at 765 kV at the sending end. (d) The line is terminated in a purely resistive load. Determine the sending end quantities and voltage regulation when the receiving end load resistance is 264.5 at 735 kV.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Short Transmission Line

A short transmission line is a transmission line that has a length less than 80 kilometers, an operating voltage level of less than 20 kV, and zero capacitance effect.

Power Flow Analysis

Power flow analysis is a topic in power engineering. It is the flow of electric power in a system. The power flow analysis is preliminary used for the various components of Alternating Current (AC) power, such as the voltage, current, real power, reactive power, and voltage angles under given load conditions and is often known as a load flow study or load flow analysis.

Complex Form

A power system is defined as the connection or network of the various components that convert the non-electrical energy into the electric form and supply the electric form of energy from the source to the load. The power system is an important parameter in power engineering and the electrical engineering profession. The powers in the power system are primarily categorized into two types- active power and reactive power.

Question

4. A three-phase, 765-kV, 60-Hz transposed line is composed of four ACSR 1,431,000, 45/7 Bobolink
conductors per phase with flat horizontal spacing of 14 m. The conductors have a diameter of 3.625
cm and a GMR of 1.439 cm. The bundle spacing is 45 cm. The line is 400 Km long, and for the
purpose of this problem, a lossless line is assumed.
(a) Determine the transmission line surge impedance Ze, phase constant ß, wave length λ, the surge
impedance loading SIL, and the ABCD constant.
(b) The line delivers 2000 MVA 0.8 lagging power factor at 735 kV. Determine the sending end
quantities and voltage regulation.
(c) Determine the receiving end quantities when 1920 MW and 600 Mvar are being transmitted at 765
kV at the sending end.
(d) The line is terminated in a purely resistive load. Determine the sending end quantities and voltage
regulation when the receiving end load resistance is 264.5 2 at 735 kV.

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Step 3: a) pPhase constant, wavelength, the surge impedance loading SIL, and ABCD constant

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Step 4: b) sending end quantities and voltage rehulation

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Step 5: c) Receiving end quantities

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Step 6: d) Sending end quantities and voltage regulation for resisitve load

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please help solve this question A 100 km Three-Phase 50 Hz transposed transmission line is composed of bundle of three ACSR, 1,431,000 cmil, 47/7 Bobolink conductors as shown in Figure 2 (a). The Three-Phases (bundled Conductors) have flat horizontal spacing of 11 meters as shown in the Figure 2(a). The conductors have a diameter of 3.8 cm and a GMR of 1.5 cm. The Line is going to be replaced with a six conductor bundle of ACSR, 477,000 cmil, 26/7 Hawk conductors. The conductors have a diameter of 2.5 cm and a GMR of 0.9 cm. The new line will have a horisontal phase spacing of 14 meters as it is going to be operated at higher Voltage rating. The new line is shown in Figure 2 (b). The spacing between the bundles in Figure 2 (a) and (b) is 45 cm. Determine,a) The capacitance for each case and the percentage change in capacitanceb) The inductive reactance for each line and the percentage change.c) The inductance for each case and the percentage change ininductance