新型三相三线制并联有源滤波器的模糊滑模控制方法

为了提高有源滤波器参考电流跟踪控制的精度,改善系统对非线性负载扰动的鲁棒性和适应性,采用一种新型的模糊滑模控制方法,设计了一种模糊滑模控制器,用于三相三线制并联有源滤波器的参考电流跟踪控制.谐波电流检测采用p-q谐波电流检测方法,能快速、准确地检测出负载电流中的谐波分量.直流侧电压采用PI控制方法实现稳定控制.Simulink仿真结果显示,与传统的滞环比较控制方法相比,所设计的新型模糊滑模控制方法能够有效地降低跟踪误差,提高有源滤波器的谐波补偿效果.

Novel Fuzzy Sliding Mode Control Method for Three-phase Three-wire Shunt Active Power Filter

In order to enhance the reference current tracking precision and improve the robust and adaptive charac- ter of the active power filter, a novel fuzzy sliding mode control method is designed to implement the reference cur- rent tracking control in three-phase three-wire shunt active power filter. The p-q harmonic detection method is ap- plied and the harmonic component in load currents can be extracted quickly and exactly. The PI control technique is used to control the stability of capacitor voltage in DC side. Simulation results reveal, compared to the hysteresis controller, the designed fuzzy sliding mode control method can reduce tracking error obviously and improve the har- momc compensation effect.