Publication detail

Evaluation of Harmonics Impact on Digital Relays

WANNOUS, K. TOMAN, P.

Original Title

Evaluation of Harmonics Impact on Digital Relays

Type

journal article in Web of Science

Language

English

Original Abstract

This paper presents the concept of the impact of harmonic distortion on a digital protection relay. The aim is to verify and determine the reasons of a mal-trip or failure to trip the protection relays; the suggested solution of the harmonic distortion is explained by a mathematical model in the Matlab Simulink programming environment. The digital relays have been tested under harmonic distortions in order to verify the function of the relays algorithm under abnormal conditions. The comparison between the protection relay algorithm under abnormal conditions and a mathematical model in the Matlab Simulink programming environment based on injected harmonics of high values is provided. The test is separated into different levels; the first level is based on the harmonic effect of an individual harmonic and mixed harmonics. The test includes the effect of the harmonics in the location of the fault point into distance protection zones. This paper is a new proposal in the signal processing of power quality disturbances using Matlab Simulink and the power quality impact on the measurements of the power system quantities; the test simulates the function of protection in power systems in terms of calculating the current and voltage values of short circuits and their faults. The paper includes several tests: frequency variations and decomposition of voltage waveforms with Fourier transforms (model) and commercial relay, the effect of the power factor on the location of fault points, the relation between the tripping time and the total harmonic distortion (THD) levels in a commercial relay, and a comparison of the THD capture between the commercial relay and the model.

Keywords

protection relay; Simulink; Matlab; Omicron CMC 256plus; power quality; enerlyzer; comtrade; distance protection

Authors

WANNOUS, K.; TOMAN, P.

Released

11. 4. 2018

Publisher

MDPI

ISBN

1996-1073

Periodical

ENERGIES

Year of study

11

Number

4

State

Swiss Confederation

Pages from

893

Pages to

893

Pages count

20

URL

http://www.mdpi.com/1996-1073/11/4/893

Full text in the Digital Library

http://hdl.handle.net/11012/70945

BibTex

@article{BUT146944,
  author="Kinan Hasan Wafaa {Wannous} and Petr {Toman}",
  title="Evaluation of Harmonics Impact on Digital Relays",
  journal="ENERGIES",
  year="2018",
  volume="11",
  number="4",
  pages="893--893",
  doi="10.3390/en11040893",
  issn="1996-1073",
  url="http://www.mdpi.com/1996-1073/11/4/893"
}