Wind inconsistency prevents the wind turbine from operating at its rated power most of the time. The concept of capacity factor (CF) is usually employed to evaluate the expected (usually annual) energy yield of wind turbine. The linear approximation is no longer valid for the winds outside the mentioned range. In this note, a nonlinear approximation of CF is proposed, valid in the whole feasible speed range. The proposed function depends on the turbine rated power and rotor blade diameter only as well and is verified by comparing the approximated CF to the CF, calculated using spreadsheet approach. A method of simple CF prediction of wind turbines, operating under Rayleigh winds, was discussed in the paper. The approach is based on a nonlinear approximation of the CF versus average wind speed curve, which only necessitates information regarding turbine rated power and rotor diameter. The presented derivation was inspired by a previously proposed linear approximation, valid only in moderate wind speeds range.
|Number of pages||4|
|Journal||International Transactions on Electrical Energy Systems|
|State||Published - 1 Dec 2014|
ASJC Scopus subject areas
- Modeling and Simulation
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering