电励磁同步发电机的变励磁控制策略

Variable Excitation Control Strategy for Electrically Excited Synchronous Generator

考虑到风电领域的电励磁同步发电机稳定工作需求,在恒定励磁电流的情况下分析电机的功角特性和运行风险,提出了结构简单、控制灵活的变励磁控制方案,该励磁模块直接由稳定的直流母线供电,省去了复杂的相控整流电源,安全可靠且成本低。基于Matlab仿真,研究了不同功率的励磁电流对电机功率因素和定子电流的影响。最后,通过实验结果证明了变励磁方案的可行性,及其相对恒励磁控制在发电效率上的优势。

Considering the stably operation of the electrically excited synchronous analyzed generator in the wind power field,the power angle characteristics and operational risk of the motor is and a simple, flexible, variable excitation control scheme with a simple structure is presented,in which scheme the excitation module is directly supplied by the stable DC bus,without complex phase controlled rectification power supply safely,reliably and economically. Based on the Matlab simulation,the influence of different power excitation current on the power factor and stator current of the motor is studied. Finally, the experiment results prove the feasibility of variable excitation scheme, and relatively constant excitation control in power efficiency advantage.