基于矢量解耦与预测电流控制相结合的APF的研究

由于基于瞬时无功理论的ip-iq谐波检测算法在非理想电网电压下不能准确地检测无功电流,介绍一种解耦控制与预测谐波电流控制相结合的控制算法。为克服解耦控制回路和预测谐波电流回路受电感参数变化的影响,提出一种基于合成矢量的无电感参数的解耦控制器,对解耦控制和预测控制回路进行改进,引入参数可自动调节的PI控制器,使控制回路适应电感参数的变化,增强控制系统的抗干扰性。最后,在Matlab/Simulink环境下,对其分别进行了仿真分析并进行比较,证明了改进之后控制算法的正确性与可行性。

Research on APF based on vector decoupling control and predictive current control

Because the ip-iq harmonic detection algorithm based on instantaneous reactive theory cannot detection reactive current under nonideal power grid voltage, this paper presents the operation mechanism of the shunt active filter with a new control algorithm. The control algorithm is composed of indirect current loop for active and reactive power control and predictive current loop for harmonic filtering control. Due to the parameters of inductor change, the value along with the current will produce error, so a decoupling controller based on synthetic vector is put forward to overcome the defect and improve the anti-interference ability of the system. The simulation is verified to the control strategy by Matlab/Simulink. The results show the correctness and effectiveness.