风力机传动链扭转振动无源控制

PASSIVITY-BASED CONTROL OF DRIVETRAIN TORSIONAL VIBRATION OF WIND TURBINE

以永磁同步风力发电系统为研究对象,研究基于其端口受控的哈密尔顿(PCH)模型的传动链扭转振动无源性控制(PBC)问题。首先,建立传动链的两质量块模型,并将其转化为能反映系统物理结构特性的PCH模型。然后,从系统能量角度出发,基于传动链的PCH模型,设计结构简单,调整参数物理意义明确的无源控制器。最后,在Matlab平台上进行无源控制策略与PID控制策略的仿真对比,仿真结果表明所提出的无源控制策略不仅能有效降低传动链的疲劳载荷,抑制扭转振动,还能提高输出功率的品质,且比PID控制策略有更好的控制效果。

The passivity-based control （PBC） for drivetrain torsional vibration was studied based on the port controlled Hamihonian （PCH） model of permanent magnet synchronous wind turbine systems. Firstly, the two-mass model of drivetrain was built, which was transformed into PCH model reflecting the physical structure characteristics of the system. Then the passivity-based controller with simple structure and parameters having clear physical meaning was designed from the system energy point and based on the drivetrain PCH model. Finally, the simulation comparison of proposed passivity-based control strategy and PID control strategy was carried out in Matlab platform. The simulation results showed that the PBC control strategy can not only effectively reduce the fatigue load of drivetrain and suppress the torsional vibration, but also improve the quality of output power, and have better control effect than PID control strategy.