Research on short-circuit force of power transformer windings considering residual

Transformer short-circuit force insufficient has been a hot research issue. There is some residual stress on the conductor section when winds the wounding, which produces adversely affect on winding short-circuit strength. This paper deduces the calculation model of the circular winding considering the residual stress. Taking the test transformer as an example, winding internal radiation short-circuit strength is simulated and researched. By comparing with the test, verifies the accuracy of the numerical model.