基于双调谐结构的有源调谐型混合滤波器研究

Research on Active Tuned Hybrid Power Filter Based on Double Tuned Structure

针对无源滤波器滤波效果不确定、滤波器与电网阻抗间可能会出现谐振等固有问题,提出一种基于双调谐结构的有源调谐型混合滤波器(ATHPF)。该滤波器在结构上将有源滤波器与双调谐滤波器有机结合到一起;在控制策略上,采取用有源滤波器对无源滤波器进行连续自动调谐的控制策略。在建立系统等值电路和数学模型基础上,明确了双调谐滤波器参数摄动对无源滤波器的滤波效果影响,进一步分析了该混合滤波器基本滤波机理,并通过搭建实验平台进行验证。结果表明,该混合滤波器具有良好的滤波效果。

Aiming at the inherent shortcomings of passive power filter,such as indeterminacy of filtering effects and possible occurrences of resonance between filter and system impedance,an active tuned hybrid power filter(ATHPF)based on double tuned structure is proposed.For the proposed filter structure,the active power filter is organically combined with a double tuned filter.For the control principle,a continuous tuned automatically control strategy is adopted for passive power filter by using active power flter.Here,the system equivalent circuit and mathematical model are both established,and meanwhile,the effect of parameter perturbation of double tuned filter on filtering performance of passive power filter is clarified.On this basis,the filtering principles of the hybrid power filter are analyzed,and the experimental platform is built to verify it.The results show that the hybrid power filter can achieve satisfactory filtering performance.