Research Article

Application Research of the Sparse Representation of Eigenvector on the PD Positioning in the Transformer Oil

Table 2

The positioning results based on sparse representation of the eigenvector.

GroupThe position of the PD source/cmTheoretical angle/(°)Direction angle/(°)The result of the three-array cross positioning/cmThe error/cm

14.5

24.7

34.5

44.4

54.5