Example 3.2 A three phase 60HZ completely transposed 345kV, 200km line has two 403mm2 26/2 ACSR conductors per bundle and the following positive sequence line constant: z= 0.032 + j0.35 0/km y= j4.2 x 10-6 S/km Full load at the receiving end of the line is 700MW at 0.99 power factor leading and at 95% of rated voltage. Assuming a medium length line with nominal n line, determine the following: a) ABCD parameters of the nominal circuit b) Sendingend voltage Vs, current Is and real power Ps c) Percent voltage regulation d) Transmission line efficiency at full load

Example 3.2 A three phase 60HZ completely transposed 345kV, 200km line has two 403mm2 26/2 ACSR conductors per bundle and the following positive sequence line constant: z= 0.032 + j0.35 0/km y= j4.2 x 10-6 S/km Full load at the receiving end of the line is 700MW at 0.99 power factor leading and at 95% of rated voltage. Assuming a medium length line with nominal n line, determine the following: a) ABCD parameters of the nominal circuit b) Sendingend voltage Vs, current Is and real power Ps c) Percent voltage regulation d) Transmission line efficiency at full load

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A three-phase 765 kV, 60Hz, 300 km, line has the following positive sequence impedance and admittance: z=0.0165+j0.3306-0.3310<87.14° 22/km, y=j4.674x10-6 S/km. Identical shunt reactors (inductors) are connected from each phase conductor to neutral at both ends of the 300-km line during light load conditions, providing 50% compensation. The reactors are removed during heavy load conditions. Full load is 1.8 kA at unity p.f. and at 730 kV. Assuming that the sending- end voltage (Vs) is constant, determine the following: a) ABCD parameters of nominal circuit b) Sending end voltage (Vs) and current (Is) c) Percent voltage regulation of the uncompensated line d) Percent voltage regulation of the compensated line
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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