在过去的20多年里，风力涡轮机的规模从20千瓦增加到5兆瓦。

During the last two decades, the production of wind turbines has grown in size from 20 KW to 5 MW. 

目前，风力发电系统存在着各种相互竞争的技术，它们的区别在于系统的复杂性、成本和控制程度。

There currently exist various competing technologies for wind generator systems whose differences lie in the complexity, cost and degree of control over the system characteristics. 

在风能系统中，风力机捕获风的能量。

In the wind energy conservation system, the wind turbine captures the wind energy. 

然后发电机将它转换成电能。

Then the generator changes it to the electrical power. 

风力机分为定速风力机和变速风力机两种。

Wind turbines are classified into two types as fixed speed wind turbine and variable speed wind turbine. 

变速风力发电机产生的能量比定速的多，还能够降低功率起伏，提高无功功率的供给。

Variable speed wind turbines yield more energy than the fixed speed wind turbines, reduce power fluctuations and improve reactive power supply. 

变速发电机主要采用直驱永磁同步发电机（PMSG）和双馈感应发电机（DFIG）。

Basically direct drive Permanent Magnet Synchronous Generator (PMSG) and Double Fed Induction Generator (DFIG) are used in variable speed wind turbine generator. 

本文对带永磁同步发电机和电力电子装置的变速风力发电机组在不同输入条件下的性能进行了仿真分析。

In this paper, the simulations of a variable-speed wind turbine with a permanent magnet synchronous generator and power electronics devices have been analyzed to performance during various input wind velocities. 

参考论文见International Journal of Recent Research and Review, Vol. VII, Issue 2, June 2014. 

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