Improving the Impedance-Based Stability Criterion by Using the Vector Fitting Method

Mohammadkazem Bakhshizadeh Dowlatabadi, Frede Blaabjerg, Jesper Hjerrild, Lukasz Kocewiak, Claus Leth Bak

Research output: Contribution to journalJournal articleResearchpeer-review

63 Downloads (Pure)

Abstract

In this paper, some issues related to the impedance-based stability criterion, such as RHP poles in the minor-loop gain, how to specify source and load impedances, and node-dependent stability margins are discussed and the vector fitting method is used to improve the method. This results in an eigenvalue analysis of the system instead of using the Nyquist diagram, and leads to obtain more information about the system. Furthermore, a participation factor analysis can be used to identify the problematic subsystem. The proposed method is examined in the assessment of a stable and an unstable system, and simulation results are used for verification.
Original languageEnglish
Article number8391731
JournalI E E E Transactions on Energy Conversion
Volume33
Issue number4
Pages (from-to)1739 - 1747
Number of pages9
ISSN0885-8969
DOIs
Publication statusPublished - Dec 2018

Fingerprint

Nyquist diagrams
Stability criteria
Factor analysis
Poles

Keywords

  • Eigenvalue analysis
  • impedance
  • harmonic stability
  • power converter
  • vector fitting

Cite this

Dowlatabadi, Mohammadkazem Bakhshizadeh ; Blaabjerg, Frede ; Hjerrild, Jesper ; Kocewiak, Lukasz ; Bak, Claus Leth. / Improving the Impedance-Based Stability Criterion by Using the Vector Fitting Method. In: I E E E Transactions on Energy Conversion. 2018 ; Vol. 33, No. 4. pp. 1739 - 1747.
@article{73b694431abf46bfb78d7c2ac71f719c,
title = "Improving the Impedance-Based Stability Criterion by Using the Vector Fitting Method",
abstract = "In this paper, some issues related to the impedance-based stability criterion, such as RHP poles in the minor-loop gain, how to specify source and load impedances, and node-dependent stability margins are discussed and the vector fitting method is used to improve the method. This results in an eigenvalue analysis of the system instead of using the Nyquist diagram, and leads to obtain more information about the system. Furthermore, a participation factor analysis can be used to identify the problematic subsystem. The proposed method is examined in the assessment of a stable and an unstable system, and simulation results are used for verification.",
keywords = "Eigenvalue analysis, impedance, harmonic stability, power converter, vector fitting",
author = "Dowlatabadi, {Mohammadkazem Bakhshizadeh} and Frede Blaabjerg and Jesper Hjerrild and Lukasz Kocewiak and Bak, {Claus Leth}",
year = "2018",
month = "12",
doi = "10.1109/TEC.2018.2849347",
language = "English",
volume = "33",
pages = "1739 -- 1747",
journal = "I E E E Transactions on Energy Conversion",
issn = "0885-8969",
publisher = "IEEE",
number = "4",

}

Improving the Impedance-Based Stability Criterion by Using the Vector Fitting Method. / Dowlatabadi, Mohammadkazem Bakhshizadeh; Blaabjerg, Frede; Hjerrild, Jesper; Kocewiak, Lukasz; Bak, Claus Leth.

In: I E E E Transactions on Energy Conversion, Vol. 33, No. 4, 8391731, 12.2018, p. 1739 - 1747.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Improving the Impedance-Based Stability Criterion by Using the Vector Fitting Method

AU - Dowlatabadi, Mohammadkazem Bakhshizadeh

AU - Blaabjerg, Frede

AU - Hjerrild, Jesper

AU - Kocewiak, Lukasz

AU - Bak, Claus Leth

PY - 2018/12

Y1 - 2018/12

N2 - In this paper, some issues related to the impedance-based stability criterion, such as RHP poles in the minor-loop gain, how to specify source and load impedances, and node-dependent stability margins are discussed and the vector fitting method is used to improve the method. This results in an eigenvalue analysis of the system instead of using the Nyquist diagram, and leads to obtain more information about the system. Furthermore, a participation factor analysis can be used to identify the problematic subsystem. The proposed method is examined in the assessment of a stable and an unstable system, and simulation results are used for verification.

AB - In this paper, some issues related to the impedance-based stability criterion, such as RHP poles in the minor-loop gain, how to specify source and load impedances, and node-dependent stability margins are discussed and the vector fitting method is used to improve the method. This results in an eigenvalue analysis of the system instead of using the Nyquist diagram, and leads to obtain more information about the system. Furthermore, a participation factor analysis can be used to identify the problematic subsystem. The proposed method is examined in the assessment of a stable and an unstable system, and simulation results are used for verification.

KW - Eigenvalue analysis

KW - impedance

KW - harmonic stability

KW - power converter

KW - vector fitting

UR - http://www.scopus.com/inward/record.url?scp=85048857361&partnerID=8YFLogxK

U2 - 10.1109/TEC.2018.2849347

DO - 10.1109/TEC.2018.2849347

M3 - Journal article

VL - 33

SP - 1739

EP - 1747

JO - I E E E Transactions on Energy Conversion

JF - I E E E Transactions on Energy Conversion

SN - 0885-8969

IS - 4

M1 - 8391731

ER -