When the corona occurs due to partial discharge (PD) of a power facility, various signals such as ultraviolet (UV) rays, nitric oxide (NO), ozone (O3) and electron impact are detected. In particular, an UV camera and the ease of inspecting and diagnosing their safety features have attracted a great deal of interest. One of the most important and difficult problems is the basic research of the filter design, materials and corona discharge. In this paper, the electric characteristics and UV image of corona discharge were investigated using a prototype Korean UV camera.

Keywords: Corona, Ultraviolet, Aging diagnosis, Partial discharge