CHENG Chuan yu

 

(Kunming Engineering Corporation Limited, Power China, Kunming 650051, China)

 

 

Abstract: Aiming that most of the fixed pitch wind turbines in the plateau areas are under state which the actual output is lower than the rated output, the fixed pitch wind turbine power performance inprovement  technology  were reseached. Combined with low air density and lagre temperature difference of plateau aresa enviornmental characteristics, one technology of adding the blade lengthening section was proposed. Through the way of adding the blade lengthening section, the rotor swept area was increased and power performance was improved. The software Bladed was used to simulate different length of the blade lengthening section, economic benefit and safety assessment was conduct and the optimal length of the blade lengthening section was calculated as 650mm. The results indicate that the power generating capacity gain rate of the wind turbines with blade lengthening section is 8.64% after monitoring power generating dataes one year, the static investment period are about 3 years and the generating gain in life period were about 1.68 million RMB.The technology is provided certain reference of the research that how to improve the output performance of the fixed pitch wind turbine in our country.

 

Key words: fixed pitch wind turbine; blade lengthening section; safety assessment; power curve; generating capacity