A generating station is laid out as shown in Fig. 17.21. The ratings and per- centage reactances of different elements are as indicated. If a 3-phase short-circuit occurs on any feeder near transformer secondary (e.g. point F), find the short-circuit MVA fed to the fault.

A generating station is laid out as shown in Fig. 17.21. The ratings and per- centage reactances of different elements are as indicated. If a 3-phase short-circuit occurs on any feeder near transformer secondary (e.g. point F), find the short-circuit MVA fed to the fault.

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

Chapter5: Transmission Lines: Steady-state Operation

Section: Chapter Questions

Problem 5.40P

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Concept explainers

Nodal Analysis

In the analysis of any electric circuit, nodal analysis is the method of determining the potential difference or voltage between different nodes in an electric circuit. A node is a point where two or more branches connect each other. In the nodal analysis, the voltages are determined in the terms of branch currents. The nodal analysis is also known as the node voltage method or branch current method. The nodal analysis method is one of the several applications of Kirchhoff's Current Law (KCL).

Question

A generating station is laid out as shown in Fig. 17.21. The ratings and per-
centage reactances of different elements are as indicated. If a 3-phase short-circuit occurs on any
feeder near transformer secondary (e.g. point F), find the short-circuit MVA fed to the fault.
10 MVA
30%
10 MVA
10%
G
A
K
10 MVA
30%
10 MVA
10%
10 MVA
30 %
10 MVA
10%
5 MVA WWWWW
5 MVA WWWW
5% MWWM 5% MWWWWM
扣
F
000
M
Tie-bar
5 MVA WWWw
5% MW
sa mga

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