MSc forsvar Anton Elbæk Sloth

Supervisorer: Niels-Erik Clausen og Kaushik Das, DTU Vindenergi

Censor: Jørgen Boldt, prev. HOFOR

Titel: “Wind hydrid power plant design – case study”

In 2020 there is more focus on sustainable energy than ever before. With the goal of having a carbon neutral energy strategy, the weaknesses and potential shortcomings of the proposedenergy solutions needs to be acknowledged and properly managed - specifically the invariability of renewables such as wind and solar energy. Through the use of hybridised power plants (HPP) containing both solar photovoltaic power production and wind energy power production, the risk of going entirely without one resource is significantly diminished. With the introduction of hybrid power plants come several new issues that need to be taken into account, including optimal PV/wind ratios and sizing based upon regional weather data, grid capacity and available area.

A Python-based modelling approach was constructed and optimised, in collaboration with DTU Risø researchers, in order to perform relevant simulations and analysis of HPP projects. The model integrates NREL cost-modules for balance of site, as well as turbine costs, and uses historical hourly normalised wind and solar production, and Nordpool electricity prices, to investigate all possible wind/PV ratios in order to find the optimal profit-maximisation solution.

Through modelling of two example cases, and a case-study regarding the estate of Vennerslund, this thesis looks to investigate the importance of several key variables in regards to the planning of HPP systems. Two example scenarios are modelled based upon Denmark and France, and are used to validate the code - through comparisons to real life projects - as well as to investigate the interactions between the model and input parameters such as varying weather conditions. A modelling of the proposed Vennerslund Estate project - developed by DTU Risø - is performed as a case study, with the focus on creating a relevant real-life simulation. This is done in order to confirm the validity of assumptions in the proposed project, and perform sensitivity analysis on key parameters - in particular grid connection capacity, CAPEX for PV and WT, and available area. Analysis of several scenarios are performed for the case study, and recommendations are given.
The proposed project is deemed to be economically viable, however it can be improved with the use of larger amounts of wind turbines. In the case of being given less than the requested 60 MW of grid capacity, scenarios on the change in revenue are presented. By viewing the project as an overplanted project, results for 30-40 MW of allowed grid capacity are analysed, and it is recommended to keep the proposed size, effectively overplanting. It is possible to further improve the proposed project by later overplanting, up to a proposed 115 MW, focusing primarily on the addition of wind turbines.


tor 05 mar 20
10:00 - 12:00


DTU Vindenergi


DTU Vindenergi, DTU Risø Campus, Frederiksborgvej 399, 4000 Roskilde, bygning 118, mødelokale Poul La Cour .