基于预测电流控制算法三相电源功率因数校正的研究

有源电力滤波器(APF)是一种能动态抑制谐波的电力电子设备。在APF的传统控制方法中,首先要检测出负载电流的谐波成分作为指令信号,然后使APF输出电流跟踪指令,从而抵消负载电流的谐波,使电网电流为理想的工频正弦波。通常只是检测的精度和速度会影响APF的补偿精度。本文针对滞环比较法和三角波比较法存在的缺点,提出一种新的预测电流控制策略,建立了数学模型,并在模型的基础上对其进行仿真。仿真结果表明,预测电流控制可以很好地改进功率因数。

Research on Three-phase Power Factor Correction based on Current Predictive Control Algorithm

Active Power Filter （APF） is a kind of power electronic equipment that can dynamically suppress harmonics. In the traditional controlling method of APF, firstly examined the harmonic components of load current as a commanding signal,and then output current following instructions by APF, thereby offset the load current harmonics, which makes powerfrequency current be the ideal sine wave. Usuaily only the testing accuracy and speed will affect the accuracy of APF compensation. The current predictive control strategy is introduced for shortcomings of hysteresis loop comparative law and triangle wave comparative law. A mathematical model was established and the system was simulated on the bases of the model. Simulation results show that the predictive current control can be a good improvement of power factor.