摘要
针对变速变桨风力发电机组(Variable Speed Variable Pitch,VSVP)如何在低风速时最大限度捕获风能以及在额定风速以上稳定输出功率进行研究。低风速时在传统风能追踪控制策略的基础上,提出通过改变最优增益系数来追踪最佳风能利用系数的自适应转矩控制策略。在额定风速以上,依据风机空气动力学原理、风轮扫及面内风速风切特性,提出基于桨叶方位角信号的独立变桨距控制策略。该策略通过权系数将统一变化的桨距角转化为3桨叶独立变化的桨距角。以国产某2 MW风力发电机组为验证对象,基于Bladed软件平台对所采用的控制策略进行仿真验证。结果表明,相对传统控制,所提出的控制策略在低风速时能够更好的追踪最大功率点。额定风速以上时,使风力发电机组能够在额定转速下保持稳定的电功率输出。
For VSVP （variable speed variable pitch） wind turbine, the control strategies are used to maximize the energy capture, maintain the stable power and reduce rotor speed fluctuation. Based on the tradition method of energy capture, with changing optimal mode gain, an adaptive torque control strategy based on the basic operation unit is proposed in this paper, It could track the optimal power coefficient in low wind speed. According to aerodynamics principle and wind shear characteristic, our proposed strategy can figure out the rated wind speed region according to the azimuth angle signal of individual pitch. The collective pitch angle is transformed into the individual variable pitch angle based on the weight number. With a research object of 2MW wind turbine, this control strategy is simulated on the GH Bladed software. Simulation results show that the proposed control strategy can achieve maximum power point in low wind speed region and the proposed strategy of individual pitch control can maintain power regulation and decrease the fluctuation of rotor speed in the rated wind speed region.
出处
《控制工程》
CSCD
北大核心
2012年第3期523-526,538,共5页
Control Engineering of China
基金
国家自然科学基金(51005255)
教育部高等学校博士学科点科研基金项目(20090191120005)
关键词
变速变桨
自适应转矩控制
最大功率点追踪
独立变桨
Bladed软件
variable speed variable pitch
adaptive torque control
maximum power point tracking
individual pitch control
Bladed software
