Transformer harmonic transmission correction algorithm under resistive active power filter background

The invention relates to the technical field of transformer harmonic transmission correction, in particular to a transformer harmonic transmission correction algorithm under the background of a resistive active power filter. After a model of a transformer under harmonic transmission is established, the whole control system is modeled, and the influence mechanism of the transformer on the system performance is analyzed, so that a transfer function needing to be compensated is obtained; the method specifically comprises the following steps: deducing a current control block diagram of the RAPF, and deducing a relation between a PCC point harmonic voltage and an actual output current of the RAPF from the block diagram; substituting a specific value to obtain a voltage-current relation; a feedforward item is obtained through calculation and serves as a correction part, and errors caused by current control are compensated. On the basis of the principle that a current instruction is generated by multiplying a port h