Abstract
Shunt active power filter (SAPF) has been widely used in active distribution network system. Improving the compensation performance of SAPF has become the focus of many scholars. The traditional filter interface usually adopts series resistance. In order to reduce the loss of damping resistance and ensure the compensation performance of SAPF, a new type of passive interface is adopted, and the double-loop control scheme of PI control combined with repeated control is adopted. By comparing the difference of the selected points of different feedback currents, when the feedback current is taken from the inverter, only a small damping resistance is needed to achieve good steady-state accuracy. Simulation results verify the correctness and effectiveness of the proposed scheme and the system feedback current selection method.
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