Digital differential protection of transformers

Digital differential protection of transformers

For access to this article, please select a purchase option:

Buy chapter PDF
(plus tax if applicable)
Buy Knowledge Pack
10 chapters for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Digital Protection for Power Systems — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

This Chapter gives a brief general review of the principles of transformer differential protection. This is followed by an explanation of the application of digital techniques and the algorithms that have been developed specifically for application to transformer protection. The algorithms covered include finite duration impulse (FIR) filters, least-squares curve fitting, the digital Fourier algorithm and the flux-restrained current differential algorithm. Finally, the basic hardware arrangement for implementing digital techniques to the protection of transformers is described. It is, however, important to note that closely similar techniques can be applied to the protection of generators, although, in this case, the transformation ratio of currents is the same on each side of the protected zone.

Inspec keywords: curve fitting; power engineering computing; power transformer protection; FIR filters

Other keywords: digital Fourier algorithm; finite duration impulse filters; flux restrained current differential algorithm; transformer differential protection; least squares curve fitting; digital differential protection; digital techniques

Subjects: Transformers and reactors

Preview this chapter:
Zoom in

Digital differential protection of transformers, Page 1 of 2

| /docserver/preview/fulltext/books/po/pbpo015e/PBPO015E_ch10-1.gif /docserver/preview/fulltext/books/po/pbpo015e/PBPO015E_ch10-2.gif

Related content

This is a required field
Please enter a valid email address