兆瓦级风力发电机独立变桨控制策略分析

Independent pitch control strtegy anlysis of MW wind turbine

实际运行环境中,由于风剪、塔影等因素的影响,风轮平面内产生不平衡载荷,导致较大的叶尖变形,增加了叶片疲劳载荷,而统一变桨控制不能有效解决载荷不均匀问题。文中提出基于线性二次型调节和干扰自适应控制技术的独立变桨控制策略。采用风力机仿真分析软件对提出的控制策略进行仿真分析并与统一变桨比较。结果表明,该控制策略降低了风剪条件下风力发电机主要部件所受的载荷,提高了机组运行寿命。

Under rel circumstnces,wind sher,tower shdow nd other fctors led to unblnced lods on wind wheel plne nd lrge tip displcement.While trditionl wind turbine control strtegy cnnot effectively solve the problem of uneven lod.In view of this,n individul pitch control strtegy is proposed by combining the liner qudrtic regultor with the disturbnce ccommodting control.Then this control strtegy is simulted under the environment of FAST nd Mtlb/Simulink softwre.Results show tht the proposed strtegy of individul pitch control cn reduce lods of min components nd improve opertionl life of wind turbines under wind sher cses.