无互联通信下多三相永磁风力发电机分布式控制关键技术研究

海上风电由于运行环境复杂多变，运维难度大，对系统可靠性要求高。由多三相永磁发电机和多变流器组成的拓扑具有典型的模块化特征，冗余程度高，是未来大型海上风电系统拓扑发展的重要趋势。然而，现有集中式和带互联线分布式控制架构限制了该拓扑高冗余度优势的发挥。因此，项目提出在多三相永磁风力发电系统中采用无互联分布式控制架构。但由于取消了控制器间的物理互联通信，本地控制器无法直接获得其他绕组单元的状态信息，绕组单元间解耦与PWM载波同步控制的实现难度激增。为解决该难题，项目研究：1)复杂磁场耦合下绕组单元对外表征机理及局部模型演变规律；2)动态功率分配下绕组单元的局部参数自辨识与自解耦控制方法;3)低开关频率下的PWM载波偏差自检测与同步自校正方法。项目提出的方法可完全发挥出多三相永磁风电系统拓扑冗余度高的优势，有效提升系统的可靠性。相关研究成果可有效推动海上风电的发展，具有重要的科学意义和工程价值。

The offshore wind power has high requirements for reliability since the complex and changeable environment leads to the difficult maintenance. The topology composed of multi-three phase permanent magnet generators and multiple converters has typical modular characteristics. It leads to high redundancy for the offshore wind power system. The topology represents the development trend of offshore wind power in the future. However, the existing centralized and distributed control architectures with interconnected line limit the redundancy of this topology. Therefore, this project proposes a wireless distributed control architecture in the offshore wind turbine based on the multi-three phase permanent magnet synchronous generator. However, due to the cancellation of the physical interconnection line between the controllers, the local controller cannot directly obtain the state of other winding units. The decoupling and PWM carrier synchronization control become more difficult. In order to solve this problem, this project prepares to study: 1) The external representation mechanism and local model evolution law of the winding unit under complex magnetic field coupling; 2) The local parameter self-identification and self-decoupling control method of the winding unit under dynamic power distribution; 3) PWM carrier deviation self-detection and self-synchronous correction method under low switching frequency. The proposed method can fully take advantage of the high redundancy of the topology in multi-three phase permanent magnet wind power system, so it can improve the reliability of the system. The research can promote the development of offshore wind power, and it has important scientific significance and engineering value.