差动调速风电系统传动比的有限时间历程优化

Limited time history optimization for transmission ratio of wind power system with differential speed regulation

针对差动调速风电系统的总体方案,提出在有限时间历程下对总体方案中3个关键位置的变速齿轮传动比进行优化。首先,建立了调速电机的峰值功率表达式,以其最小为优化目标,并利用FAST(Fatigue,Aerodynamics,Structures,Turbulence)软件仿真获得了风轮转速,以计算在一定时间历程中的调速电机峰值功率;其次,研究了齿圈输入功率与输出功率的临界点,并利用转速平面法选定差动轮系结构参数值,作为优化的约束条件;再次,采用惩罚函数外点法编程计算;最后,按照优化结果搭建了基于差动调速的1.5 MW风电系统的SIMULINK模型并进行仿真,获得了风轮、调速电机以及同步发电机的转速、转矩和功率关系,验证了上述理论分析和参数配置的有效性。

In view of the wind turbine with differential speed regulation, a limited optimization method under time history is proposed. The transmission ratio of variable gear in three key position for the overall scheme is optimized. The expression of peak power for speed regulating motor is established with its minimum as the optimization goal. FAST software is used for simulation to obtain the wind rotor speed for calculating peak power of speed regulating motor under time history. The critical conditions about input power or output power for ring gear driven by speed regulating motor is researched and the way to determine structure parameters of the differential gear train is put forward as constraint condition for optimization. The penalty function point method is adopt for calculation. A SIMULINK model of 1.5 MW wind power system based on differential speed regulation is built and ran. The rotational speed, torque and power of the wind rotor, the speed regulating motor and the synchronous generator were obtained respectively. The simulation verifies effectiveness of the theoretical analysis and parameter configuration.