Harmonic shielding method for power grid based on four-winding induction filtering power transformer

The invention discloses a harmonic shielding method for a power grid based on a four-winding induction filtering power transformer. The method comprises the steps of acquiring operation parameters ofthe power grid; establishing a data model of each port of the four-winding induction filtering power transformer; judging the operation state of the power grid; selecting an external device of the four-winding induction filtering power transformer; and carrying out harmonic shielding on the power grid. According to the method, modeling is carried out on the four-winding induction filtering power transformer, harmonic suppression or reactive compensation is carried out on the power grid through the four-winding induction filtering power transformer under different conditions, and the harmonic shielding and reactive compensation of the power grid with the four-winding induction filtering power transformer are achieved. In addition, the method is high in reliability, good in stability and good in filtering effect. 本发