摘要
对直驱永磁同步风力发电(DDPMG)系统的功率解耦控制技术进行了研究。发电机功率经整流-逆变后接入电力系统,在变流器直流侧运用boost电路实现最大功率跟踪(MPPT);当风速高于额定值时,运用PI调解器完成变桨距控制;在风力发电网侧逆变器动态数学模型基础上,采用空间矢量脉冲宽度调制(SVPWM)方式和电网电压合成矢量定向,实现了电流有功分量和无功分量的解耦及功率因数的可调控制。对方案进行了MATIAB仿真研究。结果表明,系统动态响应快,具有MPPT和功率解耦控制功能,验证了方案的可行性和正确性,为直驱永磁同步风力发电系统的进一步研究提供了可靠的理论依据。
The technology of power decoupling control of direct drive permanent { DDPMG } synchronous wind power system is studied in this paper. Wind power system is accessed to grid by rectifier-inverter and the boost circuit is used to achieve the maximum power point tracking （ MPPT} in DC side. The PI controller is used to complete the pitch control when the wind speed is higher than the rated value. Based on the dynamic mathematical model of the wind power grid-connected inverter, with the space vector pulse width modulation { SVPWM） method and grid voltage vector oriented, the adjustable control of the power factor and the decoupling of the active and reactive power are realized. MATIAB is used to study this control strategy. The simulation results show the system with this control scheme has a fast dynamic response together with MPPT and the function of power decoupling control. The feasibility and correctness of this control strategy are verified by MATIAB simulation. This paper provides a reliable theory foundation for the further study of direct-driven type wind Dower system.
出处
《电气自动化》
2013年第2期37-39,42,共4页
Electrical Automation
基金
西北民族大学中央高校基本科研业务费专项资金资助项目(zyz2011049)
关键词
风力发电
功率解耦控制
最大功率跟踪
空间矢量脉冲宽度调制
wind power generation
power decoupling control
maximum power point tracking
space vector pulse width modulation
