The network below shows two generators feeding a common bus-bar, which in turn feeds a step-up transformer and a section of overhead line. A tree has fallen across the line at point F causing a three-phase short circuit, calculate the fault current that flows.

The network below shows two generators feeding a common bus-bar, which in turn feeds a step-up transformer and a section of overhead line. A tree has fallen across the line at point F causing a three-phase short circuit, calculate the fault current that flows.

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

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.61P

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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

The network below shows two generators feeding a common bus-bar, which in turn
feeds a step-up transformer and a section of overhead line. A tree has fallen across
the line at point F causing a three-phase short circuit, calculate the fault current that
flows.
15MVA, 10%
G₁
20MVA, 15%
G2
11kV
30MVA, 6%
∞
1:3
(4+j12)Q
33kV
Fault

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