Effects of voltage harmonic on losses and temperature rise in distribution transformers. Issue 2 (1st November 2017)

• Record Type: Journal Article
• Authors: Dao, Thinh; Phung, Bao Toan
• Is Part Of: IET generation, transmission & distribution. Volume 12:Issue 2(2018)
• Page Start: 347
• Page End: 354
• Publication Date: 2017-11-01
• Subjects: power system harmonics -- power transformer testing -- distribution networks -- transformer oil -- eddy current losses; eddy‐current loss -- open‐circuit testing -- short‐circuit testing -- oil‐filled distribution transformer -- distorted voltage excitation -- supply network -- current harmonics -- power system -- harmonic pollution effect -- distribution transformers -- voltage harmonic effect; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2017.0498
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : The effects of harmonic pollution in the power system on distribution transformer losses and temperature rise have become an increasing concern. The pollution can be in the form of current and/or voltage harmonics present in the supply networks. Since the impact of voltage harmonics has hardly been investigated, this study examines the effects of distorted voltage excitation on oil‐filled distribution transformers. Short‐circuit and open‐circuit tests were conducted on two distribution transformers. The results revealed significant increase in both losses and temperature. An equation is developed to quantify the power loss. This study also derives an equation to evaluate the resistance corresponding to the eddy‐current loss.