The common dual-pulse-width-modulation converter adopts the independent method to control the rectifier and inverter, which has the defects including direct current voltage fluctuation, slow system response and so on. A coordinate strategy of dual-pulse-width modulation based on direct power control with load power feed-forward is proposed in this paper. The fixed switching frequency method with space vector pulse width modulation is provided to overcome the instability of power devices, caused by the hysteresis comparators in the conventional direct power control. With the analysis on the dynamic performance of load power feed-forward coordination, the principle of load power feed-forward is introduced to control the dual-pulse-width-modulation converter. According to the state variable of the alternating current motor, the load power is estimated to construct the feed-forward channel. The experimental results show that the proposed coordinate control method has rapid response, direct current bus voltage fluctuation minimization, lower capacity and unit power factor.

中文翻译：

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基于负载功率前馈直接功率控制的双脉宽调制变换器协调策略

常见的双脉宽调制变换器采用独立方式控制整流器和逆变器，存在直流电压波动大、系统响应慢等缺陷。提出了一种基于负载功率前馈直接功率控制的双脉宽调制协调策略。提供具有空间矢量脉宽调制的固定开关频率方法来克服传统直接功率控制中由滞后比较器引起的功率器件的不稳定性。通过对负载功率前馈协调动态性能的分析，引入负载功率前馈原理来控制双脉宽调制变换器。根据交流电机的状态变量，估计负载功率以构建前馈通道。实验结果表明，所提出的协调控制方法响应快，直流母线电压波动最小，容量和单位功率因数较低。