Evaluating the Dielectric Performance of Transformer Oil and Antioxidants Under Impulse Stress

The transformer holds a crucial place in electrical power system networks, the backbone of our modern world.Unfortunately, it often encounters problems related to defects and weaknesses in its insulation systems.To keep it working effectively, coolant and insulation purposes rely heavily on the use of oils.Preserving the dielectric strength of the transformer and ensuring it remains at a high level is the ultimate objective of manufacturers.To shed light on this matter, a series of experiments were conducted to examine how different voltage types, electrode configurations, and impurities affect the breakdown voltage of the insulating oil.The findings revealed that direct current high voltage poses a significant risk, leading to breakdowns at lower voltage levels.Furthermore, the point-plate electrode configuration emerged as the most problematic shape, as it weakened the dielectric strength of the transformer oil due to non-uniform electric fields.