3 3 THREE PHASE ELECTRIC POWER LOTTERY TRANSFORMER HAVING HARMONIC ACTIVE FILTER FUNCTION USING THREE PHASE POWER SINGLE PHASE TRANSFORMER

摘要

An object of the present invention is to provide a phase recovery device which can be used as a phase recovery device for preventing an accident that one phase is formed in an emergency and can be used as an autonomous harmonic filter capable of simultaneously outputting three phases of 380 V and three phases of 220 V. Also, Phase active harmonic filter. In order to achieve the above object, a transformer according to an aspect of the present invention includes a plurality of zigzag connection portions 130 connected to a power supply system 100 having three-phase connection for supplying AC power to a load 110, (R1, Rn, S1, Sn; T1, Tn) of the three-phase transformer and the zigzag symmetric windings (R2, Rn *; S2) of the three-phase transformer have a single- , Sn *; T2, Tn *) are wound and the winding R2 end (Rz) and S1 start (Sa) of the 3-phase transformer are connected to S phase; S2 end (Sz), T1 start (Ta) is connected to T; T2 end (Tz), R1 start (Ra) is connected to R phase; Three Ns at the beginning of Rn, Sn and Tn, and three Ns at the ends of Rn *, Sn * and Tn * are all connected to the N phase.