With the development of electrified railways

steel

chemical and other shock loads

coupled with the increase in the penetration rate of new energy generation using a large number of power electronics technologies

the problem of cross-coupling of power quality in power systems has become increasingly complex.The study of harmonic transmission through transformers Characteristics are significant.This paper starts from the equivalent harmonic model of the double winding transformer.Using the harmonic voltage coefficient and the harmonic current coefficient as the basis for measuring the law of harmonic transfer

the transfer characteristics of the harmonic voltage source and the harmonic current source through the double-winding transformer under different load rates

different power factors and different short-circuit capacities are studied respectively

which provides theoretical guidance for transformer selection and filter device design and commissioning in practical systems.