Wind Resource Assement, (WRA) and Energy Yield Assements (EYA)

The fundamental task of a wind estimate is to determine whether the project is profitable for the investor. Determining the feasibility of the project is a chain that involves all project components, from the geographical location of the windfarm to turbine locations, measurements and the turbine height and effect.

With all components in mind, we can advance from the wind estimate to the production analysis and feasibility calculation.

Advanced analytical tools

Wind estimation is primarily based on mast measurements, where we use market-leading analytical tools such as WindPRO. In complex terrain, we use WindSim’s CFD modelling for reliable results. We follow the wind power sector’s MEASNET and TR-6 standards in our analysis and produce estimates using internationally accepted best practices.

We have participated in European competitions in wind condition assessments and based on the results, we can proudly conclude that our expertise matches best actices and that our reports are on a bankable level.

Understanding inaccuracies

In wind estimations, understanding inaccuracies is one of our most important activities. Since the same team is involved from the beginning of the project development until realization, we have gathered a substantial amount of information about what causes inaccuracies.

The wind estimate and the production analysis must be such that the client can assess how uncertainties affect the project value and profitability.  

A detailed loss analysis is always included in the production analysis. We have done several studies to evaluate the accuracy of the loss estimates as it significantly affects the project’s financing model. On the Finnish market an interesting part of the loss analysis are the losses caused by icing.

Wind and production estimates (WRA or EYA)

  • Preliminary wind estimates
  • Suitable turbine type selection
  • Production analysis
  • Loss analysis
  • Uncertainty analysis (P50, P75, P90)