基于激光测风雷达的风速前馈控制算法设计

Design of Wind Speed Feedforward Control Algorithm Based on Laser Lidar

文章提出了基于激光测风雷达的风速前馈控制算法设计,其特点是通过激光雷达准确有效地测得风力发电机组前方一定距离的风速、风向信号,并把所测信号引入到原有变桨控制算法中,设计了风速前馈控制器,实现变桨速率前馈补偿。以国产某1.5 MW风力发电机组设计为例,基于Bladed软件平台对所采用的算法进行仿真验证。结果表明,在来流作用于风轮之前,控制器就已经接收到超前信号,提前准备变桨动作,避免或大大减少风力发电机组的超速故障,降低了机组载荷,提高了风力发电机组在极端风况下的安全性,进而有助于提高发电量,改善风力发电机组的运行效率。

A design of wind speed feedforward control algorithm was presented based on laser lidar in this paper. Through measuring the wind speed and wind direction signal accurately at a certain distance in front of the wind turbine, and introducing the measured signals into the pitch control algorithm, the wind speed feedforward controller was designed, then achieved the pitch rate feed- forward compensation. Taking 1.5 MW wind turbine as an example, this algorithm was simulated based on the GH Bladed software in this paper. The simulation results showed that the controller would receive the leading signal and ready ahead to perform pitch action before the flow was acted on the wind turbine. It avoided or greatly reduced the over speeding fault of wind turbine and low-ered the load. So it improved the safety of wind turbine in extreme wind conditions, which helps to improve the power generation and the efficiency of wind turbine.