提高风电机组发电量的转矩–变桨协调控制策略  

Torque-pitch Coordinated Control for Improving the Power Production of Wind Energy Conversion System

作　　者：贾锋[1] 蔡旭[1] 李征[2] 李悦强 

机构地区：[1]上海交通大学电子信息与电气工程学院风力发电研究中心,上海市闵行区200240 [2]东华大学信息科学与技术学院,上海市松江区201620

出　　处：《中国电机工程学报》2017年第19期5622-5632,共11页Proceedings of the CSEE

基　　金：台达环境与教育基金会资助项目(DREM2016005)~~

摘　　要：变速恒频风电机组由于受到变速范围及变速动态响应时间的限制,无法保持以最佳叶尖速比运行。推导出了最优桨距角随叶尖速比偏离程度变化的规律,并提出一种额定风速以下的转矩–变桨协调控制策略,当机组偏离最佳叶尖速比时,使机组工作在局部最优点上,从而提升发电量。同时,针对桨叶安装角误差对发电量及协调控制的影响问题,提出一种全局最优桨距角自寻优算法;针对有效风速难以直接获取的问题,提出了一种带动态补偿的多模式有效风速观测方法。基于RTDS和Bladed联合仿真平台,验证了转矩–变桨协调控制策略的有效性;并以实测风速进行长时间仿真和评估。结果表明所提出的方法可有效提升机组发电量。Due to the constrains of achievable speed operation range and slow tracking dynamics of generator rotor, the variable speed constant frequency wind turbines is not able to keep working on optimal tip speed ratio from cut-in wind speed all the way to rated wind speed. This paper deduced the character of optimal pitch angle, and the coordinated torque-pitch control strategy is proposed to let wind turbine operates on the possible local optimal working point when the tip speed ratio deviates from its optimal value, thus improve the power production. Meanwhile, the global optimum pitch angle self-tuning algorithm is proposed to rectify the installation error of the blades; a dynamic wind speed compensation method is proposed to estimate the immeasurable effective wind speed. The validity of coordinated control is verified with RTDS ＆ Bladed co-simulation platform; then the long time simulation with measured wind speed profile is carried out to further evaluate the promotion of power production. The results show that the proposed method can improve the power production effectively.

关 键 词：风电机组 协调控制 最大功率跟踪 变桨控制 有效风速 自寻优 

分 类 号：TM614[电气工程—电力系统及自动化]