Detecção de Descargas Parciais do Tipo Corona em Subestação de 69/138/230 kV por meio de Medições Ultrassônicas com Dispositivo Portátil de Alta Precisão

Abstract

Partial Discharges (PDs) can be harmful to electrical equipment, accelerating their aging process. Among them, corona discharge is the most prevalent type. Various methods exist for identifying PDs, one of which relies on ultrasonic measurements. This method offers the advantage of being conducted remotely while the equipment is in operation. To assess the occurrence of corona PDs using ultrasonic measurements, standardized laboratory tests were performed. These results were then compared to measurements taken at a 69/138/230 kV substation. The findings are discussed in this paper.