一种改进的虚拟永磁风力发电系统模拟平台

摘要

提出了一种包含风剪塔影效应的风力发电系统的改进型模拟方案.以背靠背三相变流器平台为基础,建立了考虑包含风剪塔影效应的虚拟永磁直驱风力发电系统的数学模型,进而搭建其控制系统;针对简化叶尖速比与转矩系数拟合的问题,提出了一种基于Kalman滤波的分段线性拟合的方法来简化拟合方程;利用MATLAB/Simulink仿真软件搭建虚拟风力发电系统模拟平台,对负载变化时的模拟平台输出以及有无风剪塔影效应时风力机的机械转矩变化进行仿真分析.仿真结果表明,该平台能够较好地模拟出风力机发电机组地运行特性.%A wind turbine generator improved simulator including wind shear and tower shadow effect was proposed.Based on 3-phase back-to-back converter platform,the control system was established on the mathematical models of the direct-driven permanent magnet wind power generator,it contained wind shear and tower shadow effect.In order to simplify the equation of the speed ratio and torque,a curve fitting method based on Kalman filter was proposed.It built the virtual platform in MATLAB/Simulink,which simulates the output of current,voltage and power as the load was changed.With the effect and without the effect,the mechanical torque output was simulated respectively.The simulation results showed that the platform could simulate the operation characteristics of wind turbine generator.