Renewable energy was responsible for producing this year around 59% of the total amount of electricity in Portugal and it is expected that 1/3 comes from wind energy sources, according to data disclosed by APREN. It becomes more and more crucial to support alternative solutions to produce energy, a topic that was highlighted on the 2016 Portuguese Association of Renewable Energies Award which has honoured Bernardo Marques Amaral Silva, a INESCTEC researcher and a MIT Portugal Program Sustainable Energy Systems Phd doctorate at the Faculty of Engineering of the University of Porto with the first prize for his thesis “Multi-terminal HVDC Grids: Control Strategies for Ancillary Services Provision in Interconnected Transmission Systems with Offshore Wind Farms” , a pioneering approach to take the best profit of Wind farms (WF).
Wind Energy (WE) has largely contributed to the de-carbonisation of the energy sector and consequently to the deﬁnition of the European Commission (EC) targets on renewable-based electricity generation. During the last decade, massive investment has culminated in the substantial installation of Wind Farms (WF). Moreover, the ambitious plans for increasing these targets on renewable-based electricity generation demand the deployment of more WF. However, the European Union has settled the goal for the level of greenhouse gas reduction by 40% (by comparison with 1990 levels) until 2030 and the share of renewable energy to 27% in terms of energy consumption.
Simultaneously, the Fukushima incident has put pressure on European governments regarding the use of nuclear power plants which, although not considered as renewable, have reduced emission of greenhouse gases (compared to conventional power plants based on fossil fuels).
In order to meet the new goals, it is expected a significant contribution from offshore wind farms (at sea). From a technical point of view, the adoption of High Voltage Direct Current (HVDC) is crucial to allow the installation of high power PE and to manage high connexion distances from the mainland. Recent procedures intend to adopt direct current networks rather than connections “point-to-point” since they may also support the connection between mainland AC networks, allowing a greater integration of renewable sources and enabling the development of a European electricity market.