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中文摘要：
直驱永磁同步风力发电（D-PMSG）系统无变速箱，效率高，稳定性好，能获得质量较好的电能，通过变换器与电网相连，可灵活控制系统的电压和频率，能够对输出的有功功率和无功功率进行相对独立的控制。文章利用电力系统分析软件DIGSILENrr／PowerFactory．在建立D—PMSG和双PWM变换器模型的基础上．结合典型算例系统结构进行了仿真分析，验证了所建模型的正确性。
英文摘要：
Due to gearbox-free, high efficiency and better stabilization, the directly driven wind tur- bine with permanent magnet synchronous generator（D-PMSG）system is able to obtain better quality of electric power, through converter attached with power grid, it can flexibly control the voltage and frequency of system and is able to independently control the output active power and reactive power relatively. Based on the model of D-PMSG and back-to-back PWM convertor by DIGSILENT/Power Factory, the typical structure of power factory was simulated, the final results testify the validity of the model.
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