基于复合预测控制的并联有源电力滤波器研究

通过建立线性预测数学模型,分析了线性预测的不稳定性和差一拍控制对谐波补偿输出的影响,提出了将线性预测与记录一周期谐波电流采样点作为后续预测电流相复合的无差拍控制,消除了采样与计算延时对系统的影响。仿真结果表明,平均滤波器应用于ip-iq谐波电流检测算法中,谐波检测精度较高、响应速度较快;采用复合无差拍控制,对谐波抑制与无功补偿有较好的稳态精度和动态响应速度。在整体上提高了并联有源电力滤波器的谐波抑制与无功补偿性能。

Study of Parallel Active Power Filter with Compound Predictive Control

By setting up the linear prediction mathematical model,the instability of linear prediction and the effect of the deadbeat control to the harmonic compensation output are studied.It provides that the value of linear prediction and a cycle of harmonic current sampling points are used for the deadbeat control for the current.Simulation results show that the application based on the instantaneous reactive power theory ip-iq harmonic current detection algorithm has the advantages of high accuracy of harmonic detection and fast response speed and the deadbeat control and improves the steady-state accuracy and dynamic response speed of harmonic suppression and reactive power compensation.