Nonlinear Virtual Inertia Control of WTGs for Enhancing Primary Frequency Response and Suppressing Drivetrain Torsional Oscillations

Bi Liu, Junbo Zhao, Qi Huang, Federico Milano, Yingchen Zhang, Weihao Hu

Research output: Contribution to journalArticlepeer-review

37 Scopus Citations

Abstract

Virtual inertia controllers (VICs) for wind turbine generators (WTGs) have been recently developed to compensate the reduction of inertia in power systems. However, VICs can induce drivetrain torsional oscillations of WTGs. This paper addresses this issue and develops a novel nonlinear VIC based on objective holographic feedback theory and the definition of a completely controllable system of Brunovsky type. Simulation results under various scenarios demonstrate that the proposed technique outperforms existing VICs in terms of enhancement of system frequency nadir, suppression of WTG drivetrain torsional oscillations, fast and smooth recovery of WTG rotor speed to the original maximum power point (MPP) before the disturbance as well as preventing secondary frequency dip caused by traditional VIC. The proposed technique is also able to adaptively coordinate multiple WTGs to enhance the frequency support and the dynamic performance of each WTG.
Original languageAmerican English
Pages (from-to)4102-4113
Number of pages12
JournalIEEE Transactions on Power Systems
Volume36
Issue number5
DOIs
StatePublished - 2021

NREL Publication Number

  • NREL/JA-5D00-79281

Keywords

  • frequency control
  • power system stability
  • torsional oscillations
  • virtual inertia control
  • wind generation

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