Analysis of the effects of magnetizing inrush current on power transformer differential protection

  • Authors:

  • Fouad Rekina;Dris Ouahdi

  • Affiliations:

  • LREEI, University of Boumerdes, Faculté des hydrocarbures et de la chimie, Algeria;LREEI, University of Boumerdes, Faculté des hydrocarbures et de la chimie, Algeria

  • Venue:
  • AEE'07 Proceedings of the 6th conference on Applications of electrical engineering
  • Year:
  • 2007

Quantified Score

Hi-index 0.00

Visualization

Abstract

In this paper, a differential protection using second harmonic restrain and fifth harmonic block schemes for power transformer protection is presented. First we review the concept of differential protection, and describe the magnetizing inrush current and over-excitation phenomena as they belong to the causes of the protection male-operation. Second, we investigate harmonic restrain scheme and microprocessor based-protection on power transformer differential protection. Finally the relay logic and the algorithm that uses Discreet Fourier transformer for extraction of fundamental and higher harmonics components of differential current are presented.