内模控制方法在永磁直驱潮流发电系统中的应用研究

针对永磁直驱潮流发电控制系统设计的问题,对潮流流速模型、最大功率追踪策略、永磁电机矢量控制、并网逆变器控制等方面进行了研究,提出了一种基于内模控制的转速控制算法以及一种新型的并网逆变器模型。使用内模控制器代替了机侧转速外环PI控制器,同时使用并网逆变器小信号模型设计了较准确的并网逆变器的控制参数。最后,基于上述算法和模型,在Matlab软件平台中对潮流发电系统进行了仿真,并对比了传统PI控制和内模控制下潮流发电系统的输出波形。仿真结果显示,所提出的优化控制策略能够准确控制发电机输出的有功功率、并网有功功率并且能够实现无功功率独立调节以及高功率因数并网运行。

Application of internal model control method in permanent magnet direct-drive tide power generation system

Aiming at design of permanent magnet direct-drive tide power generation control system,tide current speed model,MPPT,vector control of PMSM and control of grid-connected inverter were researched.A kind of speed-regulating strategy based on internal model control method and a sort of novel small signal model of grid-connected inverter were proposed.On the machine side,the internal model controller was adopted instead of the speed PI controller and on the grid side,comparative accurate control parameter was designed based on the small signal model of grid-connected inverter.Finally,the direct-drive permanent magnet tidal current generation system was simulated in Matlab,and this paper also compared the traditional PI control method with the internal model control method under the MPPT.The simulation results indicate that the proposed optimal control strategy can realize accurate control of active power of generators,independent adjustment of reactive power and variable speed constant frequency operation.