Guidelines for Aeroelastic Analyses of Wind Turbines Using Multi Body Simulations D8, D2

Wind turbine load simulations are currently mostly performed using tools that were specifically designed for that purpose. One of the draw backs of those tools is the inability to add more detail to the structural model when required. For example, there are very few degrees of freedom available in a drive train while one may need more for their...

Improved Aeroelastic Simulations using SIMPACK D6

Wind turbine load simulations are currently mostly performed using tools that were specifically designed for that purpose. One of the draw backs of those tools is the inability to add more detail to the structural model when required. For example, there are very few degrees of freedom available in a drive train while one may need more for their...

Development and testing of an advanced wind turbine control design tool

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An Overview of possible Aeroelastic Instabilities for Wind Turbine Blades

Aeroelastic instabilities can be disastrous for wind turbines. In the early years of wind turbines, aeroelasticity was not a problem, but once wind turbines became larger than 500 kW, some turbines experienced problems due to aeroelastic instabilities. Therefore it is important to design wind turbines with full knowledge of possible aeroelastic...

Enhanced approach for simulation of rotor aerodynamic loads

Uncertainty in aerodynamic load prediction is an important parameter driving the price of wind energy, especially for offshore locations. Blade Element Momentum (BEM) theory is the current standard for estimating the wind forces in load case calculations. The variety between the several engineering extensions used in different BEM...

PROcedures for TESTing and measuring wind turbine components results for yaw and pitch system and drive train

PROcedures for TESTing (PROTEST) and measuring wind energy systems) was a pre-normative project that ran from 2008 to 2010 in order to improve the reliability of mechanical components of wind turbines. Initiating the project, it was concluded that the procedures concerning these components should be further improved. Within the PROTEST project,...

Comparing different dynamic stall models

The dynamic stall phenomenon and its importance for load calculations and aeroelastic simulations is well known. Different models exist to model the effect of dynamic stall; however, a systematic comparison is still lacking. To investigate if one is performing better than another, three models are used to simulate the Ohio State University...

PROTEST, Final Report

The main results of the PROTEST project are summarised in this report. The PROTEST project was a pre-normative project focussing on improvement of the design and development procedure for the mechanical components in a wind turbine: the drive train, the pitch system and the yaw system. The current state-of-the-art is discussed and the short...

Setting up a prototype measurement campaign for mechanical components

The reliability of mechanical components of wind turbines needs to be improved. In the PROTEST project, a pre-normative project, complementary procedures are developed to improve the specification of the design loads at the interfaces where the mechanical components (pitch and yaw system as well as the drive train) are attached to the wind...

PROTEST. Suggestions for improved standards

The pre-normative PROTEST project looked at possibilities to improve the current standards by using wind turbine prototype measurements to validate the drive train, pith system and yaw system models. The main conclusions from this project that could be valuable for the standards committees are summarised in this report. These recommendations...

Determination of load cases and critical design variables

An overview of systems for which the Critical Design Variables (CDV’s) and a minimum set of Design Load Cases (DLC’s) should be specified is given. At least drive train, pitch system and yaw system should be considered, but the possibility of adding other components if required existed, however the above mentioned three systems were sufficient....

Recommended Practices for Measuring in Situ the Loads on Drive Train, Pitch System and Yaw System

The current standards and guidelines concerning prototype measurement campaigns are discussed. The experience in and requirements of load measurements is given concerning the three mechanical components: drive train, pitch system and yaw system. Based on this, a new method is proposed for setting up a prototype measurement campaign with the aim...