电工技术学报2018，Vol.33Issue(8)：1884-1893,10.DOI:10.19595/j.cnki.1000-6753.tces.161987
基于转矩随动控制的风电机组最优发电研究
Optimal Generator Study Based on Torque Follow-up Control for Wind Turbine
摘要
Abstract
It is always an essential objective for designers to enhance the energy efficiency of variable-speed, pitch-regulated wind turbines. The speed-torque look-up table is commonly adopted to achieve the optimal tip-speed ratio tracking in large-scale commercialized wind turbines. Because of the constraints of the grid connection speed and rated speed of generator, only big slope transition curves can be used to characterize the relationship between torque and speed in the boundary speed of the look-up table. Nevertheless, this method affects the stability of the output power, shortens the optimal tip speed, and reduces energy yield. This paper presents an optimal control strategy with torque following the variation of generator speed optimally. That is, a unified PI (proportional integral) controller dynamically set the limit of the output torque according to generator speed. The strategy achieves the controlling target of maximal wind energy capture below rated wind speed by solving tricky problems about immeasurability of wind speed and intractability of wind speed variation.Simulation analysis and field test demonstrate that the algorithm has good stability and dynamic performance, which improves the energy efficiency. This control algorithm is easy to be realized and popularized in wind energy industry; accordingly, it has high practical engineering significance.关键词
最大风能捕获/最佳叶尖速比/转矩随动控制/比例积分控制器Key words
Maximum power point tracking/optimal tip speed ratio/torque follow up control/PI controller分类
信息技术与安全科学引用本文复制引用
娄尧林,蔡旭,叶杭冶,何国栋..基于转矩随动控制的风电机组最优发电研究[J].电工技术学报,2018,33(8):1884-1893,10.基金项目
国家科技支撑计划资助项目(2015BAA06B01). （2015BAA06B01）
