直驱型永磁同步风力发电机混沌运动的非线性比例控制

Nonlinear proportional control of chaotic property in direct-driven permanent magnet synchronous generators for wind turbines

根据直驱型永磁同步风力发电机(DPMSG)的数学模型,通过仿射变换和时间尺度变换,将转子磁场定向坐标系下的永磁同步发电机模型变换成一种简单的无量纲数学模型。验证系统在某些参数条件下会出现混沌运动,提出直驱型永磁同步发电机混沌运动的非线性比例控制方法。该方法以直轴和交轴电压为控制变量,通过发电机状态的非线性反馈,将直轴和交轴电流方程中的耦合项解耦,并使直轴和交轴电流可以跟踪设定值。该控制方法可以根据实际要求设置唯一稳定的平衡点。仿真结果表明了理论分析的正确性和有效性,为DPMSG风力发电系统的混沌控制提供了有效的控制方法。

The mathematical model of the directly driven wind turbine with permanent magnet synchronous generator （DPMSG） was investigated. The PMSG model based on rotor field-orien- ted coordinates was transformed into a simple dimensionless model through the affine transfor- mation and time scale transformation. A nonlinear proportional control method for controlling chaos in DPMSG were used as the was presented in this paper. The direct axis and quadrature axis stator voltages manipulated variables. The coupling terms in the direct-axis and quadrature-axis stator current equations were decoupled through the nonlinear feedback of the motor＇s states. And the direct-axis and quadrature-axis stator current can track the set value. As a direct result of the control method, the controlled system has a unique stable equilibrium point which can be set to any value according to the practical requirement. The simulation results showed that the theoretical analysis was correct and effective. The research results provide effective control method for the chaos control of DPMSG wind power systems.