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电网技术  2014 

变桨风力发电机组控制器优化设计

DOI: 10.13335/j.1000-3673.pst.2014.12.026, PP. 3436-3440

Keywords: 变桨风力机,控制器优化,加性分解,稳定性证明

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Abstract:

风速的随机性和风电机组控制系统的非线性导致难以获取风电机组精确的数学模型。鉴于实际的风电工程通常采用简单的比例-积分-微分(proportionalintegraldifferential,PID)控制器或比例-积分(proportionalintegral,PI)控制器达到输出恒定功率的控制目标,不涉及复杂的智能控制算法,在风速高于额定风速时,提出了一种基于加性分解原理的方法来规范风力发电机组变桨控制器的设计参数,将风力发电机组变桨控制问题分解为2个简单的子问题,即线性时不变主系统的追踪问题和辅系统的镇定问题。基于该原理,设计出了简单的PI控制器,并在此基础上进行了控制器优化设计,而且通过理论推导给出了该控制器的稳定性证明,最后通过仿真验证优化后的控制器能够大大增加输出功率的平稳性。这将为今后设计风力发电机组变桨控制器设计提供一定的准则。

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