Icing on distribution lines can easily lead to conductor breakage

equipment burnout

or even tower collapses

posing a serious threat to power supply reliability. To ensure continuity of power supply and enhance de-icing efficiency

a de-icing transformer based on multi-stage voltage regulation on the low-voltage side is proposed

and its multiphysics behavior is analyzed. First

the operating principle and key design parameters of the de-icing transformer are elaborated. Second

a three-dimensional transient electromagnetic field model and a three-dimensional fluid-solid coupled model are constructed. Subsequently

the magnetic field distribution characteristics and loss variation patterns inside the transformer are analyzed

and the temperature rise distribution patterns under conventional power supply mode and parallel power supply-de-icing mode are compared. Finally

transformer temperature rise tests are conducted for validation. The results show that the calculated values agree well with the experimental results

effectively verifying the reliability of the proposed computational methodology and providing new insights and technical support for the innovative optimization of distribution line de-icing technologies.