Publication detail

Analysis of accuracy of the differential protection function in the unit REF 542plus

PROKOP, V.

Original Title

Analysis of accuracy of the differential protection function in the unit REF 542plus

Type

conference paper

Language

Czech

English abstract

The differential protections present basic protection to protect power transformers, motors, generators, blocks power transformer-generator, bus bars and important lines. Differential protection has to operate in a very short time to faults in the protection zone but it must not operate to faults outside. Control and protection unit REF 542plus is used to protect in medium voltage systems. Unit REF 542plus has a lot of protection functions even the differential protection function. This paper deals with measuring of accuracy of the differential protection function algorithm in the unit REF 542plus applied to protect power transformer because in this case there are the highest requirements (vector group adaptation, difference between nominal primary current and nominal secondary current, etc.). It was measured the minimum setting values of the differential protection characteristic of power transformer. Function of blocking inrush current with 2nd and 5th harmonic was also measured. Differential current was generated by the amplitude and phase simulation of incoming and outgoing currents. Accuracy of the algorithm is evaluated in the end

Key words in English

Differential current, Bias current, Tripping time

Authors

PROKOP, V.

Released

16. 5. 2006

Publisher

Brno university of technology

Location

Brno

ISBN

80-214-3180-6

Book

Eletric Power Engineering 2006

Edition

Proccedings of the 7th ISC EPE 2006

Edition number

1

Pages from

207

Pages to

211

Pages count

5

BibTex

@inproceedings{BUT18973,
  author="Václav {Prokop}",
  title="Analysis of accuracy of the differential protection function in the unit REF 542plus",
  booktitle="Eletric Power Engineering 2006",
  year="2006",
  series="Proccedings of the 7th ISC EPE 2006",
  volume="7",
  number="7",
  pages="5",
  publisher="Brno university of technology",
  address="Brno",
  isbn="80-214-3180-6"
}