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为提高无源滤波器组效能和获得高容量、高性能的有源电力滤波装置,提出了一种串入式串联混合有源电力滤波器,其电路拓扑结构是在传统串联混合有源电力滤波器(SHAPF)的基础上在其逆变器的交流侧上串入一个基波串联谐振装置。由于基波串联谐振电路具有在基波频率处的阻抗近似为零而在谐波频率处阻抗很大且随频率线性增大的功能,从而能使逆变器承受较小谐波电压,因此能增加主回路谐波阻抗,减少系统阻抗和无源滤波器组参数变化的影响。最后,仿真分析和实验结果证实了串入式SHAPF能提高无源滤波器组效能,降低有源部分容量和改善整个滤波装置的滤波性能,是一种高性能、实用的有源滤波装置。
In order to improve the efficiency of passive filter banks and to obtain high-capacity, high-performance active power filter devices, a series-in-line hybrid active power filter is proposed. Its circuit topology is based on traditional series hybrid active power filter (SHAPF) based on the inverter side of the AC string into a fundamental series resonant device. Since the fundamental series resonant circuit has a function that the impedance at the fundamental frequency is approximately zero and has a large impedance at the harmonic frequency and a linear increase in frequency so that the inverter can be subjected to a smaller harmonic voltage, Increase the main loop harmonic impedance, reduce the system impedance and passive filter group parameter changes. Finally, the simulation analysis and experimental results show that the SHAPF is a high-performance and practical active filter that can improve the efficiency of the passive filter bank, reduce the active part capacity and improve the filtering performance of the entire filter device.