Historically, Task 27 has held back-to-back meetings with IEC Maintenance Team 2, a group of experts re-writing IEC 61400-2. Participants discussed IEC standard requirements for turbulence parameters, turbulence models, and sensitive load cases, which may differ from the current requirements that were historically taken from the large wind IEC standard 61400-1.
While there are a number of existing 3-D wind resource data sources, no ongoing research exists to help experts write better turbulence requirements. On some occasions, small commercial wind turbine projects have produced less electricity than expected when compared to production estimates based on independent testing results. This inconsistency has led to confusion among consumers regarding actual turbine production.
This lack of data and inconsistent production are linked to the turbulent environment where small wind turbines are installed. Highly turbulent sites where small wind turbine consumers live and work may have less efficient turbine production than estimated. Because of this, experts recognized the need for global, shared research on turbulence parameters for high turbulence cases.