双驱风力发电机的并网建模与仿真

摘要

The decoupled control of active and reactive power has been always considered as the key technology of a variable-speed constant-frequency wind power generator. The ability to control and distribute the active and reactive power is needed for a double-driver wind turbine generator in order to improve power supply quality and reduce power loss further. Considering its grid-connected operation, the decoupled control and independent regulation of active and reactive power were implemented by combing stator-flux-oriented vector control method and applicable coordination transformation. The grid connection model and decoupled module of the double-driver wind turbine generator were created. The simulation results conducted by Matlab/Simulink simulation package show the validity of the proposed method.%风力发电机的有功功率和无功功率的解耦控制一直被认为是变速恒频风力发电系统的关键技术.为进一步提高供电质量、减少功率损耗,需要双驱电机拥有控制和分配有功及无功功率的能力.针对双驱电机并网情况,选择合适的坐标变换,应用定子磁链定向的矢量控制方法,完成有功功率和无功功率的解耦工作,实现两者的独立调节.应用Matlab/simulink仿真工具,建立双驱风力发电机的并网模型及解耦模块,仿真结果充分证明了该理论的正确性.