串联补偿式绕组开路永磁同步电机直流发电系统运行机理及控制策略研究

In order to promote the further development of AC motor power generation system, meet the requirements in the high safety field, novel open winding motor based generation system has gained wide attention in academic and industrial circles.This system has many advantages,such as strong fault-tolerant ability,high reliability, high currents control degree of freedom,easy multiphasing.However, as a novel power generation technology, this system has problems on topology structure, operating mechanism, control strategy, analysis methods, improvement of control performance and practicability techniques need to be solved.Therefore, this project will research on open winding permanent magnet synchronous motor (PMSM) based novel DC generation system, investigate working principle and control mechanism of series compensation open winding PMSM DC generator system, apply three-dimensional space vector theory to solve the three harmonic and zero sequence problems which classic space vector theory cannot solve. And this project will also research on the fault mode and tolerant control strategy.Therefore, study of this project is not only the theoretical and technical basis for the open winding motor generation system, but also the promotion to improve the development new theory and new technology of AC motor generation system.

为了推动交流电机发电系统的进一步发展，满足高安全性运行领域的要求，新型绕组开路电机发电系统获得了学术界和工业界的广泛关注。该系统具有容错能力强、可靠性高、电流可独立控制、易于扩展至多相等优势，但作为一种新兴发电技术，仍然存在系统结构、运行机理、控制策略、分析方法、性能提升与实用化等方面的重要问题亟待解决与完善。因此本申请项目拟研究基于绕组开路永磁同步电机的新型直流发电系统，探索串联补偿式绕组开路永磁直流发电拓扑的工作原理与控制机理，引入三维空间矢量理论，解决经典空间矢量理论在该系统中无法抑制三次谐波与零序分量等关键问题，并全面透彻的对系统故障模式与容错控制策略进行分析研究。本项目的成功研究不仅能够为绕组开路电机发电系统提供理论与技术基础，而且有望推动交流电机发电系统新理论与新技术的进一步发展和提升。

本项目研究了绕组开路永磁同步电机控制系统。研究中，分析了共直流母线绕组开路永磁同步电机系统的空间矢量分布、特点及各个矢量中零序分量大小；分析了零序分量产生机理及抑制原则。在此基础上，设计了矢量控制方法实现了系统的有效控制，且零序电流抑制效果良好。进一步，为了简化系统控制结构，提出了绕组开路永磁同步电机模型预测控制方法，通过构建简单的包含dq0轴电流误差的价值函数去除3个PI控制环，同时无需三维空间矢量调制，可提高系统动态特性。另外，分别提出基于不控侧电压矢量调节的模型预测控制方法与基于可控侧优化的模型预测控制方法，在保持预测控制动态优势的同时进一步提升了系统稳态性能。在理论分析基础上，搭建了物理试验样机，验证了理论分析的正确性。本项目的研究对于推动绕组开路电机系统的进一步实用化具有一定意义。