Conference Paper

Ad-hoc analytical solution based on local linearisations for doubly-fed induction generator wind turbine electromechanical simulations

Journal cp
IET Renewable Power Generation
  • Volumen: 8
  • Número: 5
  • Fecha: 01 January 2014
  • Páginas: 537-550
  • ISSN: 17521424 17521416
  • Source Type: Journal
  • DOI: 10.1049/iet-rpg.2013.0048
  • Document Type: Conference Paper
  • Publisher: Institution of Engineering and
This study presents a new methodology to solve the wind turbine modelling based on doubly-fed induction generator (DFIG) technology. The proposed solution allows us to simulate simultaneously a significant number of individuals DFIG submitted to different wind-speed profiles, minimising the computational time costs and avoiding excessive simplifications in comparison with previous solutions. For this proposal, a third-order induction generator model has been considered by the authors. The rotor current-control loops have been modelled through standard PI regulators, discussing in detail rotor voltage expressions and values of the parameters. The global non-linear equation system has been rearranged in state-space forms, by means of local linearisations and using two different software-packages that enable symbolic computation in a collaborative manner. The analytical results have been compared facing a traditional discretised solving methodology to assess the suitability of the proposed solution under different wind-speed conditions. Indeed, simulated and real-measured wind profiles have been considered for this purpose. Finally, a comparison of computational time costs for different time steps, including the effect of the number of wind turbines, is also included in this study. © The Institution of Engineering and Technology 2014.

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