Variable Speed-Variable Pitch Controllers for Aero-Servo-Elastic Simulations of Wind Turbine Support Structures
スポンサーリンク
概要
- 論文の詳細を見る
Site-specific fatigue evaluation of wind turbine support structures has been required by Japanese domestic rule since the revision of the Building Code in 2007. Fatigue loads are strongly affected by wind turbine controllers, as well as by the characteristics of wind and the wind turbines themselves. It is difficult for anyone but expert wind turbine controller engineers to design wind turbine controllers. For this project, blade pitch and generator torque controllers for a typical land-based variable speed- and pitch-controlled wind turbine were formulated using a Loop-Shaping Method, considering wind turbine characteristics such as rotor aerodynamics, tower vibration, and control systems. Controller gains were calculated by defining the gain cross frequency and phase margin for pitch control as well as the peak gain and damping ratio for generator torque control, without introducing control design tools such as the Bode diagram or the Nyquist diagram. Controllers that are compatible with the fatigue loads of towers and blades as well as pitch rate were investigated through case studies of three kinds of towers. Fatigue loads of the support structures were shown to depend not on gain cross frequencies themselves but on those frequencies first normalized by tower mode-bending frequencies. The normalized gain cross frequencies of pitch controllers were recommended to be about 20%. Furthermore, gain scheduling, which reduces pitch commands to filtered pitch angles, was shown to be effective in reducing fatigue loads with improved characteristics.
論文 | ランダム
- シンガポール・マレーシア 華人社会と宗教信仰 (直江廣治先生退官記念集)
- シンガポ-ル・マレ-シア華人社会と宗教信仰 (直江広治先生退官記念集)
- 食道切除後の再建術 食道回腸吻合・食道結腸吻合 (マスターしておきたい縫合・吻合法の実際--より安全・確実に行うために) -- (縫合・吻合法の実際)
- Na利尿ペプチド受容体と浸透圧適応 (総特集 魚類の生育・適応機能と遺伝子)
- 2-P3-23 脳外傷における社会的行動障害の効率的な診断について(脳外傷,ポスター,一般演題,リハビリテーション医学の進歩と実践,第43回日本リハビリテーション医学会学術集会)