中文摘要：

针对应用于风力机模拟的传统直接转矩控制存在的转矩脉动大的缺点，提出了一种改进的直接转矩控制方法。首先对传统的直接转矩控制转矩脉动产生的原因进行了分析，在此基础上通过向电压空间矢量中插入零矢量以及采用转矩控制双层滞环比较的方式对传统方法进行了改进，之后将改进方法应用于风力机模拟系统。仿真结果验证了改进方法在提高风力机模拟效果上的有效性。

英文摘要：

In allusion to the shortcomings of the traditional direct torque control applying in wind turbine simulation such as torque ripple, an improved direct torque control method was presented. First the reason of torque ripple in traditional direct torque control was analyzed and improved by inserting zero vector to voltage space vector and applying double- deck hysteresis comparison of torque control, after that the improved method was applied to simulation of wind turbine. The simulation results show that the method presented has more advantages in the wind turbine simulation than the traditional control method.