Correction of saturated current from measurement current transformer

Ozgonenel O.

IET ELECTRIC POWER APPLICATIONS, vol.7, no.7, pp.580-585, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 7
  • Publication Date: 2013
  • Doi Number: 10.1049/iet-epa.2013.0105
  • Journal Name: IET ELECTRIC POWER APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.580-585
  • Keywords: compensation, current transformers, magnetic hysteresis, magnetisation, transformer windings, saturated current correction, secondary current distorted, measurement-type current transformer, CT, compensating algorithm, magnetising current estimation, FroIhlich hysteresis approach, X-R ratio, winding topology, apparent power 10 VA, COMBINED WAVELET TRANSFORM, SECONDARY CURRENTS, NEURAL-NETWORK, COMPENSATION, HYSTERESIS, SIMULATION, MODEL, ALGORITHM
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

The suggested study presents an easy and effective way to compensate for the distorted secondary current of measurement-type current transformers (CTs). The suggested compensating algorithm is based on estimating the magnetising current from a Frohlich hysteresis approach. The efficiency of the proposed technique was first proved using computer simulations. The prototype compensating device was then tested in a laboratory environment using a 5/1A, 10VA, C0,5 measurement-type CT. The proposed compensation algorithm is dependent on CT burden and X/R ratio of the line where CT is connected. The outcomes of the study demonstrate that the technique is able to reconstruct the secondary current with an acceptable error and can be applied to any measurement-type CT regardless of its size and winding topology.