With the analysis on the drawbacks of the traditional direct power control for three‐phase pulse width modulation (PWM) rectifier, including the unfixed switching frequency, the higher grid‐side current harmonic component, and the longer system setting time, one method of the model predictive direct power control based on error correction for three‐phase voltage source PWM rectifier is proposed in this paper. Based on instantaneous power theory, the PWM rectifier model predictive objective function of is built. Its partial derivative is calculated to predict the variations of active and reactive power in the next sampling period and achieve the tracking control for the given power of the next period. The second‐order Lagrange interpolation method is introduced to correct the predict power to achieve the minimum error of active and reactive power between actual value and the predicted value. Instead of switch table, space vector PWM is adopted to drive the power switch of rectifier. This method simplifies power control inner‐loop structure and is able to achieve the fixed switching frequency. The experimental results show that this method has better dynamic and static performance; the system is not sensitive to the change of inductance parameters; it can reduce the total harmonic distortion of grid current effectively and improve the power factor.

中文翻译：

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基于误差校正的三相电压源PWM整流器模型预测直接功率控制

通过分析传统的直接功率控制的三相脉宽调制（PWM）整流器的缺点，包括不固定的开关频率，更高的电网侧电流谐波分量和更长的系统设置时间，一种方法是提出了一种基于误差校正的三相电压源PWM整流器模型预测直接功率控制。基于瞬时功率理论，建立了PWM整流器模型的预测目标函数。计算其偏导数可预测下一个采样周期中有功功率和无功功率的变化，并实现对下一个周期给定功率的跟踪控制。引入了二阶Lagrange插值方法来校正预测功率，以在实际值和预测值之间实现有功和无功功率的最小误差。代替开关表，采用空间矢量PWM驱动整流器的电源开关。这种方法简化了功率控制内环结构，并能够达到固定的开关频率。实验结果表明，该方法具有较好的动态和静态性能。系统对电感参数的变化不敏感；可以有效降低电网电流的总谐波畸变，提高功率因数。这种方法简化了功率控制内环结构，并能够达到固定的开关频率。实验结果表明，该方法具有较好的动态和静态性能。系统对电感参数的变化不敏感；可以有效降低电网电流的总谐波畸变，提高功率因数。该方法简化了功率控制内环结构，并能够实现固定的开关频率。实验结果表明，该方法具有较好的动态和静态性能。系统对电感参数的变化不敏感；可以有效降低电网电流的总谐波畸变，提高功率因数。