Study on SF

6

combination of electrical partial discharge detection and precise location is of great significanceto improve equipment maintenance efficiency. In this paper

some special cases GIS partial discharge pinpoint prob-lems

first

a new type of wideband UHF（0.7

4

GHz）equiangular spiral antenna sensor is developed

and compre-hensive treatment and delay times based on the weighted average of the positioning of the partial discharge waveformalgorithm are proposed

and a method for auxiliary confirmation of partial discharge defects based on X-ray excita-tion is established. Taking the spot location of GIS partial discharge defect in the 220 kV station

No. 2 transformer asan example

compared with the existing UHF location method

it has been proved that the integrated diagnosis meth-od proposed in this paper is more effective for the precise location of partial discharge in some special cases.