Answered: Compared to three-phase machines (for…

Compared to three-phase machines (for the same rated capacity), single phase machines have O higher power factor O less flexibility in the choice of voltages O higher efficiency O smaller sizes

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.31P: Consider two interconnected voltage sources connected by a line of impedance Z=jX, as shown in...

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Concept explainers

HVDC

HVDC stands for high voltage direct current in the electric power transmission system. The high voltage direct current system uses direct current (DC) for the transmission of electrical power through transmission lines in contrast with the alternating current that is the AC system. The HVDC is used to transmit bulk power point-to-point through long distances transmission lines. Power is rapidly transferred because the efficiency of transmission lines is greatly increased over long distances due to HVDC lines.

Question

Compared to three-phase machines (for the same rated capacity), single phase machines have
O higher power factor
O less flexibility in the choice of voltages
O higher efficiency
O smaller sizes
If the line-to-neutral capacitance of a single-phase transmission line is 12 µF, then line- to-line
capacitance equals to
O 12 µF
O 24 µF
O 6 µF
O 3 µF

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