带感应耦合器的永磁同步风力发电系统建模与分析

对一种新型风力发电系统——带感应耦合器的永磁同步风力发电系统进行了研究.建立了自然风、风力涡轮机、感应耦合器及永磁同步发电机的数学模型和仿真模型.建立基于传递函数的系统整体动态仿真模型,并将其作为分析研究系统动态特性的工具.对阵风和涡轮机转矩产生7.5Hz波动条件下,有和无感应耦合器两种情况下永磁同步风力发电机的特性进行对比分析.讨论了感应耦合器的等效电阻对系统特性的影响.研究结果表明,引入感应耦合器有效削弱了干扰对系统的影响,降低了电压闪变程度,改善了风速变化或涡轮转矩波动时系统运行不稳定的情况.另外,耦合器等效电阻的减小可减小其运行的转差率,提高系统效率,但稳定性有所下降.

Modeling and analysis of the synchronous permanent magnet wind generator system with induction coupling

A new type of wind generator system: synchronous permanent magnet wind generator system with induction coupling (SS-PMG) has been studied.The modeling of natural wind and turbine,induction coupling and synchronous permanent-magnet generator has been done.The dynamic performance simulation model based on transfer function of the system has been established and used for analysis.The different performance of the system whether the induction coupling is inside it or not,to changes in wind and 7.5 Hz turbine torque pulsation has been studied.The effective of different resistance of induction coupling to the system has been discussed.The conclusion shows that the induction coupling acts like a filter to disturbance,prevent voltage flickering and unstable operation due to oscillatory wind speed and turbine pulsations.Furthermore,the reducing of induction coupling resistance will decrease the slip,and leads to higher efficiency but less stability.