Impact of phase locked loop with different types and control dynamics on resonance of DFIG system

Zakiud Din, Jianzhong Zhang, Hussain Bassi, Muhyaddin Rawa, Yipeng Song

Research output: Contribution to journalJournal articleResearchpeer-review

14 Citations (Scopus)
12 Downloads (Pure)

Abstract

In recent years, the doubly fed induction generator (DFIG) operates in a weak grid, rather than a strong grid due to the high proportion of wind energy into the power grid. The impedance interaction between the DFIG system and series and parallel compensated weak grid might cause the subsynchronous resonance (SSR) and high frequency resonance (HFR) in the DFIG system, respectively. Phase locked loop (PLL) is a popular grid synchronization technique, and the high bandwidth PLL can cause resonance at middle frequencies in the DFIG system. However, the impact of PLL types and their controller dynamics on the resonance in the DFIG system are not adequately researched. The impact of the PLL controller with different types, such as synchronous reference frame (SRF) and Lead/Lag PLL, is studied in this paper to fill this gap. Additionally, an improved PLL is proposed, which can guarantee the high phase margin and decrease the likelihood of the resonance at middle frequencies in the DFIG system under a weak grid. Moreover, the phase margin of the DFIG system impedance with an improved PLL is less sensitive to its controller parameters. Simulation and experimental results verify the effectiveness of the proposed method.

Original languageEnglish
Article number1039
JournalEnergies
Volume13
Issue number5
ISSN1996-1073
DOIs
Publication statusPublished - 2020

Bibliographical note

Publisher Copyright: © 2020 by the authors.

Keywords

  • Doubly fed induction generator
  • Phase locked loop
  • Phase margin
  • Resonance

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