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Tesi etd-09102018-122252


Thesis type
Tesi di laurea magistrale
Author
BECCACECE, ALESSIO
URN
etd-09102018-122252
Title
Modelling, Analysis and Control of Offshore Wind Generation Systems
Struttura
INGEGNERIA DELL'ENERGIA, DEI SISTEMI, DEL TERRITORIO E DELLE COSTRUZIONI
Corso di studi
INGEGNERIA ELETTRICA
Commissione
relatore Prof. Bolognesi, Paolo
correlatore Dott.ssa Biagini, Veronica
correlatore Dott. Biskoping, Matthias
Parole chiave
  • electric generator control
  • wind farm
  • DC wind turbine
Data inizio appello
28/09/2018;
Consultabilità
completa
Riassunto analitico
Countries all around the world are setting new targets, on renewable energy, to be<br>achieved in the coming years. Europe is proceeding in line with its 2020 targets,<br>and current discussion within EU indicate that the overall renewable targets<br>could be raised to 35% by 2030. Due to this there is still a great need around the<br>world for new power generation, which is clean, a ordable, reliable and quick to<br>install. Wind power is leading the transition away from fossil fuels and continues<br>to blow away the competition on price, performance and reliability. The industry<br>is maturing really fast, especially the o shore sector. O shore prices for projects<br>to be completed in the next ve years or so are half of what they were for the last<br> ve years, installations in 2017 almost doubled the one in 2016 marking a record<br>year for the o shore wind industry.<br>This thesis, developed in collaboration with the ABB Corporate Research<br>Center in Ladenburg (Germany), deals with the analysis of an innovative o shore<br>wind farm con guration based on a DC grid. First the state of art and the<br>di erent o shore wind farm topologies were introduced, then the system analysed<br>in the thesis was presented and discussed in details through software modelling<br>and simulations.<br>Chapter 2 shows how the main components of the system were modelled using<br>the PLECS software. A detailed description of all components was provided, with<br>equations and models.<br>The control system was designed and modelled using the reference feedforward<br>technique because it has several advantages compare to the classical feedback<br>con guration. It was implemented in Matlab/Simulink how shown in Chapter 3.<br>The cable length was designed to avoid resonances in the interconnection<br>cable between the wind turbine and the o shore substation. Investigating the<br>in<br>uence of the control parameters a new way to avoid resonances was found,<br>which is changing the gains of the PI controller.<br>In the end, simulations results are shown and discussed in details to demon-<br>strate the e ectiveness of the analysed system and of the adopted designing<br>method.
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