风力机偏航控制策略及系统设计

采用爬山控制算法控制风力机偏航机构,与常规的偏航控制系统必须依赖风速风向传感器不同的是,该方法不需要风速风向传感器装置,只要测量风力发电机的输出电压和电流,根据风力机输出功率的变化,不断寻找最大功率点,由DSP控制器发出指令调节偏航电机的起停和转向,通过减速传动装置,从而快速有效的控制机舱始终处于迎风状态。文中给出了1.5MW双馈风力机偏航控制系统的软硬件设计,用PSCAD软件进行了仿真。采用DSP控制器,实时性好,数据处理速度快,采用大的传动比,使得机舱具有对风快速、平稳特点。

Yaw Control Strategy and System Design for Wind Turbine

Applying Hill-Climbing control algorithm to a yaw setup for wind turbine,it is independent of any anemoscope and wind direction measure device compareing to general yaw control system.Only through measuring the voltage and current of the turbine out-put and according to the changes of the turbine output power,the on-off and rotating derection of the yaw motor can be adjusted by controller,accordingly the turbine cabin will be always on windward status through gearing-down.The paper presents the software and hardware design of yaw control system for 1.5MW DFIG,and simulates the theory analyse by dint of PSCAD software.It also has a good real-time and fast data processing performance with DSP controller,and because of designing larger drive ratio of gearing,cab-in of the system has a faster and balanced windward characteristic.