Wind energy converter GROWIAN II. Windenergieanlage GROWIAN II

The objective of the program was to investigate advanced concepts for multi-MW-wind energy conversion systems in the rotor class of 135 m diam. A concept selection was performed amongst two-bladed and one-bladed candidate systems. The preferred solution was a variable-speed horizontal-axis downwind machine with a one-bladed teetering rotor and a guyed soft steel tower. A 1 : 3 scaled demonstrator with a rotor diameter of 48 m was built and erected at a site close to Bremerhaven. The demonstrator will undergo a 2-years verification test program under a follow-on contract.