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为减小有源滤波器的容量,提出了一种新型混合有源滤波器的拓扑结构。其基本思想是:根据分流原理,适当控制有源部分来等效增大系统支路的谐波阻抗,提高无源滤波器的滤波效果;将有源部分与基波谐振电路并联来减小有源部分容量;合理地配置注入支路的参数,以保证滤波器具有较好的滤波能力和一定的无功补偿能力。仿真和实验结果证明了所提出的混合有源滤波器的可行性和正确性,所提出的拓扑结构消耗的有效材料少,体积小,占地面积小。
In order to reduce the capacity of active filter, a novel hybrid active filter topology is proposed. The basic idea is: according to shunt principle, properly control the active part to equivalently increase the harmonic impedance of the system branch to improve the filtering effect of passive filter; the active part and the fundamental resonant circuit in parallel to reduce the Source part of the capacity; reasonable configuration injection parameters of the branch to ensure that the filter has a good filtering ability and a certain degree of reactive power compensation capability. The simulation and experimental results prove the feasibility and correctness of the proposed hybrid active filter. The proposed topology consumes less material, has smaller size and covers less area.