大颗粒携带电荷及其对变压器油局部放电的影响

The Acquired Charge of Macro-particle and Its Effect on the Partial Discharge of Transformer Oil

观测了油中颗粒在交流电场下的运动规律 ,通过分析计算不同金属颗粒的携带电荷和浮起场强 ,以及测量球板电极下油中存在金属大颗粒时的局放特性曲线 。

This paper presents the research on the effect of macro particle on the characteristic of partial discharge of transformer oil. The movement of charged macro particle sphere stressed with alternating voltage in transformer oil is observed. The feature of partial discharge in transformer oil with macro particle is researched. The levitating electric stress and acquired charge of metal particle are analyzed and calculated. And then the feature of partial discharge is analyzed. The result shows that macro particle in transformer oil threaten the safety of operating transformer.