小型并网永磁直驱风电系统控制的研究

摘要

A low cost small scale grid-connected permanent magnet direct-drive wind power system was discussed. The system consists of a permanent-magnet synchronous generator (PMSG) , a diode rectifier, a Boost converter and a three-phase PWM VSI. The maximum power tracking is realized by controlling the Boost converter. The PWM VSI is controlled based on grid voltage orientation control to regulate the dc voltage and manipulate the reactive power output to the grid using double closed-loops vector control structure. Experimental results with a scaled 15 kW prototype validate the proposed control strategy.%该文讨论了一种低成本的小型并网永磁直驱风力发电系统.该系统由永磁同步发电机(PMSG)、二极管整流电路、Boost斩波电路和三相电压型PWM逆变器组成.通过控制Boost斩波电路,实现风力发电系统的最大功率跟踪.利用电网电压定向控制技术控制三相电压型PWM逆变器,采用双闭环矢量控制结构,调节直流电压并控制流向电网的无功功率.最后,以15 kW的样机的实验结果验证了系统控制策略的可行性.