9887

Adjustment of Protection Zones in an Impedance Relay for Two Adjacent Transmission Lines

This Demonstration shows how to calculate adjustments for the protection zones in an impedance relay between two adjacent transmission lines.
The "AB transmission line parameters" are the resistance and reactance of the first line. The adjacent BC line is treated analogously.
The "properties of the adjustment" controls are the parameters needed to adjust in the impedance relay. Zone 1 gives the percentage of the AB transmission line that needs protection. Zones 2 and 3 protect the AB and BC lines. Zone 3 is backup protection for zone 2, and zone 2 is backup protection for zone 1.
The "maximum torque angle" control is a parameter for electromechanical relays and represents the angle of adjustment. Every protection adjustment is referenced to this angle.

SNAPSHOTS

  • [Snapshot]
  • [Snapshot]
  • [Snapshot]

DETAILS

References
[1] W. D. Stevenson, Jr., Elements of Power System Analysis, 3rd ed., New York: McGraw–Hill, New York, 1975.
[2] C. R. Mason, "Line Protection with Distance Relays," Art & Science of Protective Relaying, Hoboken, NJ: Wiley, 1956 pp. 295–321.
[3] "Distance Protection," Network Protection & Automation Guide, Paris, France: AREVA, 2005 pp. 171–191.
[4] "Impedance Relay and Protection Assemblies," Zurich, Switzerland: ABB, 1999.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.









 
RELATED RESOURCES
Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in Step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2014 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+