Study on the influence of layout methods of fluorescent fibers on the detection of partial discharge signals

Partial discharge optical measurement method has a strong anti-interference ability and high sensitivity, becoming one of the most important and effective methods to evaluate the insulation condition of electrical equipment, whose signal detection capability is closely related to the way the fluorescent fiber sensor is laid out. In order to clarify this point, an experimental platform for fluorescent fiber PD detection was built in this paper. Compared with the commonly used UHF method, the influence of the variation of the relative distance between the sensor and the insulation defect on the PD detection effect was studied in two cases: linear layout and Archimedes layout. The results show that the sensitivity of the fluorescent fiber Archimedes layout is better than the linear layout for the same horizontal distance; when the distance from the PD defect is less than 45 cm, the two layout methods of fluorescent fiber sensors have higher detection sensitivity than the UHF sensors. For a linear layout, increasing horizontal distance has a more detrimental effect on PD detection than vertical distance.