Mitigation of 2w-Ripple in PMSG-based Wind Turbine Under Unbalanced Grid Voltages Using DOBC Along With Notch Filter

Moayad Alanani, Rachid Errouissi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Typical PMSG based wind turbine consists of an electrical generator, machine-side converter (MSC), grid-side converter (GSC), dc-link capacitor, and a passive filter to connect the GSC to the grid. Under unbalanced grid voltage, the GSC can be used to control the active and reactive powers to implement fault ride through (FRT) algorithm. In such a case, the role of MSC reduces to regulating the dc-link voltage to a constant command value by controlling the stator currents of the PMSG. However, grid voltage unbalance can generate second-order harmonic ripples in the dc-link voltage, which can create a sinusoidal oscillation of frequency 2w in the torque of PMSG, where w is the grid frequency in rad/s. This paper proposes the use of notch filter to prevent the propagation of the dc-link voltage oscillation to the torque of PMSG. Moreover, disturbance observer-based control (DOBC) approach is used as a basis to design robust controllers for both GSC and MSC. The key feature of the proposed DOBC technique is its ability to achieve asymptotic regulation and accurate tracking of sinusoidal references of known frequencies to cope with voltage unbalance. Simulation tests have been conducted to verify the effectiveness of the proposed controllers.

Original languageEnglish
Title of host publicationEUROCON 2023 - 20th International Conference on Smart Technologies, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages484-489
Number of pages6
ISBN (Electronic)9781665463973
DOIs
Publication statusPublished - 2023
Event20th International Conference on Smart Technologies, EUROCON 2023 - Torino, Italy
Duration: Jul 6 2023Jul 8 2023

Publication series

NameEUROCON 2023 - 20th International Conference on Smart Technologies, Proceedings

Conference

Conference20th International Conference on Smart Technologies, EUROCON 2023
Country/TerritoryItaly
CityTorino
Period7/6/237/8/23

Keywords

  • Disturbance observer
  • PMSG based wind turbine
  • grid-tied converter
  • notch filter
  • sinusoidal disturbance rejection
  • unbalanced grid voltages

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Science Applications
  • Information Systems
  • Information Systems and Management
  • Electrical and Electronic Engineering
  • Instrumentation

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