A model for losses and costs predictions in the electrical grid of an onshore wind farm

• Main Author: Ledieu, Maud
• Format: Others
• Language: English
• Published: KTH, Kraft- och värmeteknologi 2015
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170366

When developing a wind power project, it is necessary to have a lifetime perspective to make the most economically viable choices. This is particularly true when designing the internal electrical grid of the windfarm. Quite often, the impact of the losses is set aside and only the investment cost is considered. The objective of this thesis is to develop a model that can be used for any wind project to calculate the costs associated to the internal electrical grid over the lifetime. The model can take from one to ten wind distribution as an input, includes optimization tools to help dimensioning the grid, and gives information on the economic impact of these choices over the lifetime of the windfarm. Integrated in Excel, the model has shown satisfying results when compared to measured data with a difference under 5% and given interesting insights on the impact of the choice of voltage level and the dimensioning of the cables on the economy of the park, among others. The model includes additional features concerning the connection options and the connection tariffs, to give a complete overview of the electrical structure, but this aspect is part of another thesis performed simultaneously by Malin Sundberg.