The selection of the bulk power transmission technology in offshore wind
farms is strongly related to the wind farm size and its distance to shore.
Several alternatives can be evaluated depending on the rated power of the
offshore wind farm, the transmission losses and the investment cost for
constructing the transmission system. However, when is necessary to
connect larger and more distant offshore wind farms; the best
technological solution tends to the transmission system based on highvoltage
and direct-current with line commutated converters (LCC-HVdc).
This dissertation proposes the use of diode-based rectifers as a technical
alternative to replace the thyristor-based rectifers in an LCC-HVdc link with
unidirectional power flow. This alternative shows advantages with regard
to lower conduction losses, lower installation costs and higher reliability.
Nonetheless, as a counterpart the offshore ac-grid control performed by
the thyristor-based HVdc rectifer is no longer available. This lack of control
is compensated by using new control strategies over an offshore wind
farm composed by wind turbines with permanent-magnet generators and
fully-rated converters. The control strategies have been based mainly on
the ability of the wind turbine grid-side converter to perform the control of
the offshore ac-grid voltage and frequency. The performance has been
evaluated by using PSCAD. Wherein, the most common grid disturbances
have been used to demonstrate the fault-ride-through capability as well as
the adequate steady state and transient response. / Rodríguez D'derlée, JJ. (2013). Control strategies for offshore wind farms based on PMSG wind turbines and HVdc connection with uncontrolled rectifier [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/34510
| Identifer | oai:union.ndltd.org:upv.es/oai:riunet.upv.es:10251/34510 |
| Date | 16 December 2013 |
| Creators | Rodríguez D'Derlée, Johel José |
| Contributors | Blasco Giménez, Ramón Manuel, Universitat Politècnica de València. Departamento de Ingeniería de Sistemas y Automática - Departament d'Enginyeria de Sistemes i Automàtica |
| Publisher | Universitat Politècnica de València |
| Source Sets | Universitat Politècnica de València |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/doctoralThesis, info:eu-repo/semantics/acceptedVersion |
| Source | Riunet |
| Rights | http://rightsstatements.org/vocab/InC/1.0/, info:eu-repo/semantics/openAccess |
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