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Project #1

Project Title: Short Circuit Study

Description: Complete a short-circuit study for 5 bus test system described in the Appendix I. The system Z matrices

are given. Consider the following type of fault:  Three-phase-ground fault, fault resistance Rf = 0 p.u. Assuming that the fault occurs at each non-source system bus (one at a time), calculate:  Fault current (all phases)  All bus voltages (all phases)  All branch currents (all phases)

Deliverables: Report consisting of two parts:

 Explanation of the work completed  The results as described above (see note below as well)

***Note: Express all results in polar form. The results in rectangular form will not be acceptable.

Programming Consideration: - Matlab, MathWorks should be used for programming.

- Procedural style of programming should be used (do not write spaghetti code).

Literature: Paul M. Anderson, “Analysis of Faulted Power Systems” Matlab Reference Manual, MathWorks Plagiarism: First page in the report should contain signed and dated statement that confirms that all the work in the

report is completed solely by the respective individual. Total Points: 25 pts. Due Dates: December 1, 2016 Submit: Report & Source Code

EE 777K

Fall 2016

  "On my honor, as a Shocker, I have neither given nor received unauthorized aid on this academic  work. In particular, I certify that I have listed in references all the sources that I consulted regarding  this assignment, and that I have not received or given any assistance that is contrary to the letter or  the spirit of the collaboration guidelines for this assignment."                      

Signature:

Printed Name:

WSU ID:

Date:

EE 777K Computer Program for Short-Circuit Studies

Appendix I

INPUT DATA FOR 5-BUS TEST SYSTEM

Parameters of the system are given in the following table:

Impedance

Number

Connecting

Nodes

Self Impedance Zero Sequence

Mutual Impedance

Mutual

Element Positive Negative Zero

1 4 - 1 0.25 0.25 0.03 … … 2 5 - 3 0.20 0.20 0.02 … … 3 1 - 2 0.08 0.08 0.14 … … 4 2 - 3 0.06 0.06 0.10 0.05 5 5 2 - 3 0.06 0.06 0.12 0.05 4 6 1 - 3 0.13 0.13 0.17 … …

The system sequence matrices are also given (all impedances are in p.u.):

  





  



 

1215.01151.00981.0

1151.01345.01061.0

0981.01061.01274.0

1

jjj

jjj

jjj

Z Positive-Sequence matrix

  





  



 

1215.01151.00981.0

1151.01345.01061.0

0981.01061.01274.0

2

jjj

jjj

jjj

Z Negative-Sequence matrix

  





  



 

0200.00200.00200.0

0200.00831.00546.0

0200.00546.01157.0

0

jjj

jjj

jjj

Z Zero-Sequence matrix

Notes: Assume that pre-fault voltage is flat, Vf = 1. All given impedances are in p.u. Buses 4 and 5 are source buses and they have been eliminated from the system matrices. All the results should be given in p. u.

1 2 3

4 5

1

3 4

5

2

6