(a) A balanced A-connected load with impedance 9+j 15 2 per phase is connected to balanced 3-phase Y-connected generator (phase voltage = 230 rms) through transmission lines of 0.15 + j2.02. Determine the line voltage at the sending end, line voltage at the receiving end, and also the power lost in the transmission line. (b) Two balanced three-phase loads are connected to 11 kV, 50 Hz line. Load- 1 draws 30 kW at a power factor of 0.6 lagging, while load-2 draws 45 kVAR at a power factor of 0.8 lagging. Determine the power factor of the combined load. Find the per-phase capacitance of A-connected capacitor bank that will raise the power factor 0.9 lagging.

(a) A balanced A-connected load with impedance 9+j 15 2 per phase is connected to balanced 3-phase Y-connected generator (phase voltage = 230 rms) through transmission lines of 0.15 + j2.02. Determine the line voltage at the sending end, line voltage at the receiving end, and also the power lost in the transmission line. (b) Two balanced three-phase loads are connected to 11 kV, 50 Hz line. Load- 1 draws 30 kW at a power factor of 0.6 lagging, while load-2 draws 45 kVAR at a power factor of 0.8 lagging. Determine the power factor of the combined load. Find the per-phase capacitance of A-connected capacitor bank that will raise the power factor 0.9 lagging.

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

Chapter8: Symmetrical Components

Section: Chapter Questions

Problem 8.5MCQ

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Concept explainers

Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

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6.
(a) A balanced A-connected load with impedance 9+j 15 2 per phase is connected to
balanced 3-phase Y-connected generator (phase voltage = 230 rms) through
transmission lines of 0.15 + j2.002. Determine the line voltage at the sending end, line
voltage at the receiving end, and also the power lost in the transmission line.
(b) Two balanced three-phase loads are connected to 11 kV, 50 Hz line. Load- 1 draws
30 kW at a power factor of 0.6 lagging, while load-2 draws 45 kVAR at a power factor
of 0.8 lagging. Determine the power factor of the combined load. Find the per-phase
capacitance of A-connected capacitor bank that will raise the power factor 0.9 lagging.

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