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Engineering

Electrical Engineering

power

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

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.38P: Consider a three-phase generator rated 300MVA,23kV, supplying a system load of 240 MA and 0.9 power...

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

What is the main direct cause of reactive power in AC system?
A. Resistance of transmission lines
B. Inductance and capacitance in the loads
C. Ideal transformer connected in the system
D. Power produced by generator
2. “Reactive power in a system is dissipated generally as thermal energy?”
A. TRUE
B. FALSE
3. Which of the following statements are correct for three phase circuit:
A. Sum of all the three phase currents is zero in unbalanced network
B. Total power transfer to load is constant with time
C. Neutral conductor is same size in terms of material used as in single phase conductors
D. Net apparent power consumed is equal to real power

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