风力机风速测控系统的研究.pdfVIP

现代科学仪器 第3期2011年6月 12 Modern Scientific Instruments No.3 Jun. 2010 风力机风速测控系统的研究 李　俊　何玉林　苏东旭　黄　帅 （重庆大学机械传动国家重点实验室 重庆 400030） 摘　要　针对变速变桨风力机如何在额定风速以下时追踪最大风能利用系数，对在额定风速以上时抑制输出功率的波动 进行了研究。在风速测控系统中，提出了低风速时运用自适应转矩控制策略；高风速时为了稳定输出功率，根据估计的有效风 速给出合适的前馈桨距角，实现动态前馈补偿与传统PID反馈结合的变桨距控制策略。基于Bladed和MATLAB软件平台，应用 此方法对某 2MW 变速变桨风电机组进行仿真比较。结果表明：此系统在低风速时能够更好追踪最大功率点，在高风速时能有效 稳定输出功率。 关键词　 自适应转矩控制；卡尔曼滤波；牛顿-拉夫逊算法；风速估计；前馈控制 中图分类号　TH115 Research on Wind Speed Measurement and Control System of Wind Turbine Li Jun, He Yulin, Su Dongxu, Huang Shuai (State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China) Abstract Aiming at variable-speed variable-pitch (VSVP) regulated wind turbine, this paper investigates the tech- nique of tracking the maximum power coeffi cient under the rated speed, and constraining the output power fl uctuation above it. In the wind speed measurement and control system, the control strategy named self-adapting torque control at low wind speed was presented. While above the rated speed, the suitable feed-forward pitch angle was provided according to estimated effective wind speed. Also a variable-pitch control strategy was suggested with combined dynamic feed for- ward and traditional PID feedback in the system. Based on the Bladed and MATLAB software platform, we conducted the comparison of the proposed control scheme and the tradition one on certain 2MW VSVP wind turbine. The yielded results showed that the system has more maximum power tracking ability of the suggested control strategy under the rated speed, and the wind turbine can effectively maintain stable output power beyond it. Key words Self-adapting torque control; Kalman fi lter; Newton-Rap