It is well-known that the presence of non-linear loads in the distribution system can impair the power quality. The problem becomes worse in microgrids and power electronic-based power systems as the increasing penetration of single-phase distributed generation may result in a more unbalanced grid voltage. Shunt active power filters (SAPFs) are used for improving the power quality and compensating for the unbalance grid voltage. This study presents a modification of the classical control structure based on the finite control set model predictive control (FCS-MPC). The proposed control structure can retain all the advantages of FCS-MPC, while improving the input current quality. Furthermore, a computationally efficient cost function based on only a single objective is introduced, and its effect on reducing the current ripple is demonstrated. The presented solution provides a fast response to the transients as well as compensates for the unbalanced grid voltage conditions. A straightforward single loop controller is compared to the conventional way of realising the active power filters, which is based on space vector pulse width modulation. The simulation results have been obtained from MATLAB/SIMULINK environment, while the obtained experimental results, utilising a 15 kVA power converter, highlight the effective performance of the proposed control scheme and verifies the introduced MPC-based method as a viable control solution for SAPFs.

中文翻译：

---

利用基于预测电流控制的有源功率滤波器来降低谐波和实现非理想的电压补偿

众所周知，配电系统中非线性负载的存在会损害电能质量。在微电网和基于电力电子的电力系统中，此问题变得更加严重，因为单相分布式发电的普及率不断提高，可能导致电网电压更加不平衡。并联有源功率滤波器（SAPF）用于改善电源质量并补偿电网不平衡电压。这项研究提出了基于有限控制集模型预测控制（FCS-MPC）的经典控制结构的修改。所提出的控制结构可以保留FCS-MPC的所有优点，同时改善输入电流质量。此外，介绍了仅基于单个目标的高效计算成本函数，并论证了其对减少电流纹波的影响。提出的解决方案提供了对瞬态的快速响应，并补偿了不平衡的电网电压条件。将简单的单环控制器与基于空间矢量脉冲宽度调制的实现有源功率滤波器的常规方法进行了比较。从MATLAB / SIMULINK环境获得了仿真结果，而利用15 kVA功率转换器获得的实验结果则突出了所提出的控制方案的有效性能，并验证了所引入的基于MPC的方法作为SAPF的可行控制解决方案。这是基于空间矢量脉冲宽度调制的。从MATLAB / SIMULINK环境获得了仿真结果，而利用15 kVA功率转换器获得的实验结果则突出了所提出的控制方案的有效性能，并验证了所引入的基于MPC的方法作为SAPF的可行控制解决方案。这是基于空间矢量脉冲宽度调制的。从MATLAB / SIMULINK环境获得了仿真结果，而利用15 kVA功率转换器获得的实验结果则突出了所提出的控制方案的有效性能，并验证了所引入的基于MPC的方法作为SAPF的可行控制解决方案。