In order to apply distributed optical fiber sensing technology to deformation monitoring of transformer windings

this paper researches the transformer winding deformation on different laying modes of fibers. In this pa-per

the transformer winding model of distributed fiber is laid on the inner diameter side

outer diameter side andsurface. These models are used to simulate the winding deformation in practical operation. The process of transformerwinding has been corresponding improved. When the winding is partially deformed

the optical fiber strain will bemeasured by Brillouin Optical Time Domain Reflectometer（BOTDR）. The results show that the distributed optical fi-ber laid on the outer diameter side of the winding has large pre-strain and the repeatability of the measurement re-sults is poor. The distributed optical fiber laid on the inner diameter side and the surface of the winding has less pre-strain

uniform strain distribution

and the reproducible results. However

when the distributed optical fiber is laidon the outer diameter side and the inner diameter side of the winding

the engineering implementation is complicatedand the original structure of the winding is greatly changed. In a word

the fiber laid on the winding surface is mostsuitable for deformation monitoring of transformer windings

which followed by laying on the inner diameter side of the winding. The worst method is the outer diameter side of the winding.