Exploring and modeling how partial discharge phenomena impact the lifespan of power transformers and high-voltage bushings

Transformers are essential for the transmission and distribution of electrical energy, making their insulation issues critical. Failures in insulation can lead to power supply interruptions, which may have severe consequences. One of the primary causes of insulation failure in power transformers is partial discharge (PD). The IEC standard sets a limit for acceptable PD levels; if these discharges are not accurately monitored or identified, they can damage the transformer’s insulation. Even short-lived discharges can produce misleading readings from measuring devices, further decreasing the transformer's lifespan. Assessing partial discharges is crucial as it offers valuable insights into the reliability of high-voltage power equipment. PDs often occur in areas of weakness within the insulation, such as voids, cracks, and imperfections, and are considered a major factor in long-term insulation degradation and failure. In this paper, we delve into the definition of partial discharge and its effects on transformers and high-voltage bushings. We analyze simulations of partial discharge in a single void, assess relevant equations, and discuss diagnostic methods. Finally, we present conclusions and strategies to minimize the impact of this phenomenon on transformer performance.

کلیدواژه ها:

Partial Discharges ، Insulation ، High voltage bushing