无刷双馈风力发电机的变速恒频最大功率跟踪

发布时间：2018-02-15 00:06

本文关键词： 风力发电无刷双馈发电机直接转矩控制控制绕组磁链最大功率跟踪变速恒频　出处：《太阳能学报》2014年11期 　论文类型：期刊论文

【摘要】：针对风力发电用变速恒频无刷双馈发电机系统,提出采用直接转矩控制方法,通过控制无刷双馈发电机的转矩和功率因数来调节其有功功率,采用最大功率因数原则设定控制绕组的磁链给定,以提高发电效率,改善电能质量,且在估计转矩时使功率绕组侧输出电压在并网前满足并网条件,以同时实现最大功率跟踪控制和变速恒频运行。此外,为了改善无刷双馈发电机直接转矩控制系统的低频性能,采用模型参考自适应辨识技术来设计控制绕组的磁链观测器,以控制绕组的电流作为比较信号,同时考虑控制绕组的电阻变化对磁链观测的影响,并利用Lyapunov稳定性定理来推导自适应率。最后通过仿真分析和实验研究验证了所提出控制方案的正确性和可行性。
[Abstract]:Aiming at variable speed constant frequency brushless doubly-fed generator system for wind power generation, a direct torque control method is proposed to regulate the active power of brushless doubly-fed generator by controlling the torque and power factor of the brushless doubly-fed generator. The maximum power factor principle is used to set the flux setting of the control winding to improve the generation efficiency and the power quality, and to make the output voltage of the power winding side meet the grid-connected condition before the grid connection when the torque is estimated. In order to improve the low frequency performance of brushless doubly-fed generator direct torque control system, model reference adaptive identification technique is used to design the flux observer of control winding. The current of the control winding is taken as the comparative signal, and the influence of the change of the resistance of the control winding on the flux observation is considered. The Lyapunov stability theorem is used to derive the adaptive rate. Finally, the correctness and feasibility of the proposed control scheme are verified by simulation analysis and experimental research.
【作者单位】：沈阳工业大学电气工程学院;
【基金】：国家自然科学基金(51277124;51277125) 辽宁省教育厅一般项目(L2012027)
【分类号】：TM315

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