Effects of current harmonics on maximum loading capability for solar power plant transformers

Bonginkosi A. Thango, Jacobus A. Jordaan, Agha F. Nnachi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

16 Citations (Scopus)

Abstract

Distribution transformers are commonly designed and manufactured to operate at fundamental frequency and to facilitate sinusoidal loads. The operation of loads that draw distorted currents culminate in higher losses, hotspot temperatures, degradation of insulation materials and declined service life. To avert these technical challenges, the continuous power rating of the transformer under current harmonics has to be reduced. This paper presents some analysis into the effect of current harmonics on the maximum loading capability of oil-filled transformers that are intended to operate within solar power plants. The harmonic spectrum derived by the presence of non-linear loads and seen by the transformer during service is presented. A recommended practice for derating the transformer described in the IEEE std. C57. 10-2018 is adopted in the study.

Original languageEnglish
Title of host publication2020 International SAUPEC/RobMech/PRASA Conference, SAUPEC/RobMech/PRASA 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728141626
DOIs
Publication statusPublished - Jan 2020
Externally publishedYes
Event2020 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa, SAUPEC/RobMech/PRASA 2020 - Cape Town, South Africa
Duration: 29 Jan 202031 Jan 2020

Publication series

Name2020 International SAUPEC/RobMech/PRASA Conference, SAUPEC/RobMech/PRASA 2020

Conference

Conference2020 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa, SAUPEC/RobMech/PRASA 2020
Country/TerritorySouth Africa
CityCape Town
Period29/01/2031/01/20

Keywords

  • Degradation of insulation
  • Derating
  • Distribution transformers
  • Hotspot temperatures
  • Losses
  • Service life

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Vision and Pattern Recognition
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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