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A novel control solution for improved trajectory tracking and LVRT performance in DFIG-based wind turbines

  • Ahmad HashemiEmail author
  • Christian Conficoni
  • Andrea Tilli
Article
  • 6 Downloads

Abstract

This paper presents a new control strategy for the rotor side converter of Doubly-Fed Induction Generator based Wind Turbine systems, under severe voltage dips. The main goal is to fulfill the Low Voltage Ride Through performance, required by modern grid codes. In this respect, the key point is to limit oscillations (particularly on rotor currents) triggered by line faults, so that the system keeps operating with graceful behavior. To this aim, a suitable feedforward-feedback control solution is proposed for the DFIG rotor side. The feedforward part exploits oscillation-free reference trajectories, analytically derived for the system internal dynamics. State feedback, designed accounting for control voltage limits, endows the system with robustness and further tame oscillations during faults. Moreover, improved torque and stator reactive power tracking during faults is achieved, proposing an exact mapping between such quantities and rotor-side currents, which are conventionally used as controlled outputs. Numerical simulations are provided to validate the capability of the proposed approach to effectively cope with harsh faults.

Keywords

Doubly-fed induction generator (DFIG) wind turbine (WT) feedforward-feedback control mapping solution low voltage ride through (LVRT) 

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Copyright information

© South China University of Technology, Academy of Mathematics and Systems Science, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Authors and Affiliations

  • Ahmad Hashemi
    • 1
    • 2
    Email author
  • Christian Conficoni
    • 1
  • Andrea Tilli
    • 1
  1. 1.The Center of Complex Automated Systems (CASY) at the Department of Electrical, Electronic and Information Engineering (DEI)University of BolognaBolognaItaly
  2. 2.Sama Technical and Vocational training CollegeIslamic Azad University, Kermanshah BranchKermanshahIran

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