F. Pereira

Understanding the Use of PD Measurements in High Voltage Hydro-Generators

Partial discharges (PD) in large electric machines are a critical phenomenon often misunderstood. Partial discharges are neither harmless nor extremely dangerous. They indicate a localized electrical breakdown within the insulation of high-voltage equipment. Over time, especially in the long term, PD can deteriorate the insulation, leading to significant damage and potential failure of the machine. This paper addresses common misconceptions about PD, elucidating their implications for high voltage rotating machines based on existing literature and own research.