直驱风电系统LVRT无源混合控制研究  

Passivity-based Hybrid Control to Research on the LVRT of Direct-drive Wind Power

作　　者：马先芹[1] 王久和[1] 

机构地区：[1]北京信息科技大学自动化学院,北京100192

出　　处：《电气传动》2014年第6期31-35,41,共6页Electric Drive

基　　金：国家自然科学基金资助项目(5107705);北京市高校创新能力提升计划项目(PXM2013_014224_000095);北京市教委科技发展计划面上项目(SQKM-201211232009);北京市青年拔尖人才培育计划项目(CIT&TCD201304111)

摘　　要：为了加强永磁直驱风电系统低电压穿越能力和输出功率的稳定性,提出将网侧电压的跌落信号反馈到整流侧,作为整流侧输出功率的参考值,减小了直流端的功率不平衡。对此,采用以无源控制为主、PI控制为辅的混合控制策略,分别建立了机侧和网侧变流器的EL数学模型,得到了dq轴电流解耦的控制律,为提高变流器的动态性能,采用注入阻尼的方法对控制器进行优化。仿真结果表明所提控制策略是可行的。In order to enhance low voltage ride through（LVRT）capability and stabilize output power of direct-drive permanent magnet wind power system,presented using the grid-side voltage drop signal feedback to the rectifier side as the output power reference value,and decreased the DC side power imbalance. For this novel hybrid control strategy based on passivity and PI control is adopted. Euler- lagrange（EL）model of the dual- PWM converter are established. And the control law that can decouple dq axis currents based on the EL model,in order to improve the dynamic performance of the inverter,we can adopt the approach called injecting damping to optimize the controller.The simulation results show that based on the proposed control strategy is feasible.

关 键 词：直驱风力发电 PWM变流器 无源控制 低电压穿越 阻尼注入 

分 类 号：TM315[电气工程—电机]