Modular multilevel converter based hvdc transmission system for offshore wind farms

  1. SOLAS MARTINEZ, ESTIBALIZ
Supervised by:
  1. Gonzalo Abad Biain Director
  2. Jon Andoni Barrena Bruña Co-director

Defence university: Mondragon Unibertsitatea

Fecha de defensa: 05 October 2012

Committee:
  1. Mariusz Malinowski Chair
  2. Igor Baraia-Etxaburu Zubiaurre Secretary
  3. Sergio Aurtenechea Larrinaga Committee member
  4. Luis María Marroyo Palomo Committee member
  5. Emilio José Bueno Peña Committee member
Department:
  1. 1ENG Electric energy

Type: Thesis

Teseo: 336445 DIALNET lock_openTESEO editor

Abstract

This doctoral thesis falls within the scope of electronic power converters oriented to high voltage transmission applications, in particular the power generated in remote offshore wind farms by means of HVDC subsea cables. This research is focused on the Modular Multilevel Converter (MMC) with two level submodules but also with multilevel topology submodules such as 3L-FC (three level flying capacitors) and 3L-NPC (three level neutral point capacitors). The main contribution of this thesis is the developed PWM based modulation strategy which allows the balancing of the total amount of submodules capacitors. It is applicable to the aforementioned submodule topologies under different working conditions as evidenced by experimental results.