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High-Frequency Modeling of a Three-Winding Power Transformer Using Sweep Frequency Response Analysis

Authors
Yoon, YeunggurlSon, YongjuCho, JintaeJang, SuHyeongKim, Young-GeunChoi, Sungyun
Issue Date
7월-2021
Publisher
MDPI
Keywords
FRA; parameter estimation; power transformer; SFRA; transformer
Citation
ENERGIES, v.14, no.13
Indexed
SCIE
SCOPUS
Journal Title
ENERGIES
Volume
14
Number
13
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/127744
DOI
10.3390/en14134009
ISSN
1996-1073
Abstract
A power transformer is an essential device for stable and reliable power transfer to customers. Therefore, accurate modeling of transformers is required for simulation-based analysis with the model. The paper proposes an efficient and straightforward parameter estimation of power transformers based on sweep frequency response analysis (SFRA) test data. The method first develops a transformer model consisting of repetitive RLC sections and mutual inductances and then aligns the simulated SFRA curve with the measured one by adjusting parameters. Note that this adjustment is based on individual parameter impacts on the SFRA curve. After aligning the two curves, the final transformer model can be obtained. In this paper, actual single-phase, three-winding transformer model parameters were estimated based on field SFRA data, showing that SFRA curves simulated from the estimated model are consistent with the measured data.
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공과대학 (전기전자공학부)
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