In this paper, several methods for detecting partial discharges in transformers will be discussed. The occurrence of partial discharges in electrical equipment is of great concern to energy companies, as they are defects that are often not noticeable during a visual inspection. This causes the partial discharge to evolve into a more severe defect, often causing the need to remove equipment from service. The different methods for detecting partial discharges will be discussed and their characteristics and applicability will be investigated. In addition, the main advantages and disadvantages of each method will be presented.
