Guidelines for Stability Analysis of the DDSRF-PLL Using LTI and LTP Modelling in the Presence of Imbalance

Lucia Beloqui Larumbe, Zian Qin*, Pavol Bauer

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
214 Downloads (Pure)

Abstract

In this article, the Linear Time Invariant (LTI) and Linear Time Periodic (LTP) models of two different implementations of the DDSRF-PLL in the presence of voltage imbalance are derived analytically. The accuracy of the models is investigated with time domain simulations, frequency scans, and stability analysis. On top of this, a guideline for properly choosing between LTI and LTP models for stability assessment of the DDSRF-PLL according to the degree of grid voltage imbalance is proposed. Furthermore, it is revealed that, depending on the DDSRF-PLL implementation, the positive-sequence voltage might also cause LTP dynamics, rendering the LTI model inaccurate even when the imbalance is low.
Original languageEnglish
Article number9781849
Pages (from-to)339-352
Number of pages14
JournalIEEE Open Journal of the Industrial Electronics Society
Volume3
DOIs
Publication statusPublished - 2022

Keywords

  • DDSRF-PLL
  • Linear Time Periodic
  • LVRT
  • small-signal stability
  • unbalanced system
  • voltage imbalance

Fingerprint

Dive into the research topics of 'Guidelines for Stability Analysis of the DDSRF-PLL Using LTI and LTP Modelling in the Presence of Imbalance'. Together they form a unique fingerprint.

Cite this