Retrofitting the BCTRAN Transformer Model with Non-Linear Magnetizing Branches for the Accurate Study of Low-Frequency Deep Saturating Transients

Ming Yang, Reza Kazemi, Saeed Jazebi, Digvijay Deswal, Francisco De Leon

Research output: Contribution to journalArticle

Abstract

In the paper, an extension to the multi-winding BCTRAN model is proposed for the study of low-frequency saturating transients in single-phase transformers. The conventional experimentally obtained BCTRAN (winding leakage) susceptance matrix is retrofitted with a previously missing experimentally obtained non-linear (core magnetizing) model. The assembled model gives accurate results for transients in all terminals. The model parameters can be acquired from information available in the nameplate plus terminal tests without the need of detailed transformer design or construction information. Only needed are standard no-load and impedance tests plus a newly introduced saturation test. Very simple formulas are proposed to compute the parameters. Illustration examples on how the parameters are computed are given for three transformers rated 1.8 kVA, 5 kVA, and 75 kVA. For model validation, laboratory inrush currents tests are carried out and compared with simulations using the EMTP-RV. The results show that the simulations and experimental results match very closely giving great confidence in the model correct-ness and parameter estimation method.

Original languageEnglish (US)
JournalIEEE Transactions on Power Delivery
DOIs
StateAccepted/In press - Apr 9 2018

Fingerprint

Retrofitting
Nameplates
Parameter estimation

Keywords

  • BCTRAN
  • Circuit faults
  • Computational modeling
  • electromagnetic transients
  • EMTP
  • Integrated circuit modeling
  • Magnetic cores
  • Magnetic flux
  • saturation inductance
  • Saturation magnetization
  • terminal measurements
  • transformer modeling
  • Windings

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

@article{35232e28903e4c6ca5baace92f302734,
title = "Retrofitting the BCTRAN Transformer Model with Non-Linear Magnetizing Branches for the Accurate Study of Low-Frequency Deep Saturating Transients",
abstract = "In the paper, an extension to the multi-winding BCTRAN model is proposed for the study of low-frequency saturating transients in single-phase transformers. The conventional experimentally obtained BCTRAN (winding leakage) susceptance matrix is retrofitted with a previously missing experimentally obtained non-linear (core magnetizing) model. The assembled model gives accurate results for transients in all terminals. The model parameters can be acquired from information available in the nameplate plus terminal tests without the need of detailed transformer design or construction information. Only needed are standard no-load and impedance tests plus a newly introduced saturation test. Very simple formulas are proposed to compute the parameters. Illustration examples on how the parameters are computed are given for three transformers rated 1.8 kVA, 5 kVA, and 75 kVA. For model validation, laboratory inrush currents tests are carried out and compared with simulations using the EMTP-RV. The results show that the simulations and experimental results match very closely giving great confidence in the model correct-ness and parameter estimation method.",
keywords = "BCTRAN, Circuit faults, Computational modeling, electromagnetic transients, EMTP, Integrated circuit modeling, Magnetic cores, Magnetic flux, saturation inductance, Saturation magnetization, terminal measurements, transformer modeling, Windings",
author = "Ming Yang and Reza Kazemi and Saeed Jazebi and Digvijay Deswal and {De Leon}, Francisco",
year = "2018",
month = "4",
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doi = "10.1109/TPWRD.2018.2825252",
language = "English (US)",
journal = "IEEE Transactions on Power Delivery",
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AU - Kazemi, Reza

AU - Jazebi, Saeed

AU - Deswal, Digvijay

AU - De Leon, Francisco

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AB - In the paper, an extension to the multi-winding BCTRAN model is proposed for the study of low-frequency saturating transients in single-phase transformers. The conventional experimentally obtained BCTRAN (winding leakage) susceptance matrix is retrofitted with a previously missing experimentally obtained non-linear (core magnetizing) model. The assembled model gives accurate results for transients in all terminals. The model parameters can be acquired from information available in the nameplate plus terminal tests without the need of detailed transformer design or construction information. Only needed are standard no-load and impedance tests plus a newly introduced saturation test. Very simple formulas are proposed to compute the parameters. Illustration examples on how the parameters are computed are given for three transformers rated 1.8 kVA, 5 kVA, and 75 kVA. For model validation, laboratory inrush currents tests are carried out and compared with simulations using the EMTP-RV. The results show that the simulations and experimental results match very closely giving great confidence in the model correct-ness and parameter estimation method.

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