Loading...

Small-Signal stability analysis of DFIG-based wind turbines equipped with auxiliary control systems under variable wind speed

Ravanji, M.H ; Sharif University of Technology | 2020

657 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/EEEIC/ICPSEurope49358.2020.9160721
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2020
  4. Abstract:
  5. Providing ancillary services such as frequency support and power operating reserve by doubly fed induction gener-ator-based wind turbines has received considerable attention in the recent years, and several auxiliary controllers have been proposed to provide these services. In this paper, small-signal stability of wind turbines equipped with these controllers is assessed in presence of a frequency event and varying wind speed conditions. For this purpose, first, several auxiliary controllers are discussed, and a unified auxiliary controller (UAC) is proposed, which can represent all of these controllers simultaneously. Then, the overall transfer function from the wind speed to the wind turbine rotor speed considering the proposed UAC is derived. Moreover, by neglecting the power grid effects, an approximated first-order transfer function is also obtained. Exhaustive simulations examine the system stability with UAC, under both computer-generated and real wind speed profiles. In addition, simulation results confirm validity of the obtained detailed transfer function and the accuracy of its approximated version for several auxiliary controllers, by selecting appropriate UAC parameters. © 2020 IEEE
  6. Keywords:
  7. Deloading controller ; Doubly-fed induction generator (DFIG) ; Unified auxiliary controller ; Virtual inertial controller (VIC) ; Wind speed variation ; Wind turbine ; Asynchronous generators ; Control system analysis ; Control system stability ; Controllers ; Electric machine control ; Signal analysis ; Speed ; Transfer functions ; Wind ; Wind turbines ; Auxiliary controllers ; DFIG-based wind turbines ; Doubly-fed inductions ; Exhaustive simulation ; Small signal stability ; Small signal stability analysis ; Wind speed profiles ; Wind turbine rotors ; Electric power transmission networks
  8. Source: 2020 IEEE International Conference on Environment and Electrical Engineering and 2020 IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2020, 9 June 2020 through 12 June 2020 ; 2020
  9. URL: https://ieeexplore.ieee.org/document/9160721