风电机组复杂工况下振动抑制模糊控制策略

Fuzzy Control Strategy for Wind Turbine Vibration Suppression under Complicated Operating Conditions

复杂地形特定区域风力湍流强度大,风电机组频繁触发振动超限故障,执行停机保护,发电量损失严重。为了减少风电机组停机故障次数,提高风电机组运行稳定性,文章对风电机组特定地域、强湍流风等复杂工况下的运行特性进行分析,并基于模糊控制的理论,提出一种基于特定场址复杂工况下的振动抑制模糊控制方法。该方法通过建立振动识别算法进行振动工况分级,在此基础上基于模糊控制算法进行振动抑制,相较常规停机或分扇区控制,该模糊控制策略避免了机组频繁启停,保证了发电量,提升了机组运行稳定性。以3.x MW机组为研究对象,使用Bladed软件进行仿真分析,并在风电场进行实验验证,结果表明,采用该振动抑制模糊控制方法能使风机快速穿越特定地域、强湍流风等复杂工况,机舱前后加速度均方根最大值降低23.87%,有效提高了机组的可靠性。

Complicated terrains,specific regions,and high wind turbulence intensity frequently trigger shutdown protection of wind turbines due to vibration beyond the designated limit,resulting in serious loss of power generation.This paper aims at reducing the frequency of shutdowns and improving operational stability of wind turbines.Operational characteristics of wind turbines under complicated conditions such as specific regions and strong turbulent wind were analyzed.A fuzzy control approach was proposed based on pertinent theory,to deal with complicated operating conditions at specific sites.This strategy incorporates a vibration recognition algorithm to classify vibration conditions and a fuzzy control algorithm for vibration suppression based on the categorized conditions.Compared with the conventional shutdown or sector-based control methods,the proposed fuzzy control strategy of vibration suppression eliminates the frequent starting and stopping of wind turbines,thus ensuring power generation and improving operational stability.Furthermore,a simulation analysis was performed using Bladed software,taking 3.x MW wind turbines as the research object.Subsequent experimental verification was carried out at a wind farm.In the experiment,the application of the fuzzy vibration suppression control method effectively led to the quick ride-through of the wind turbine amid the complicated operating conditions including the specific region and strong turbulent wind.A 23.87%reduction in the maximum RMS of the front and rear accelerations of the nacelle demonstrated a substantial enhancement in the wind turbine reliability.