【摘要】 现在 ,电力系统中普遍采用真空断路器。但是开合真空断路器时易产生较大的操作过电压 ,对电动机的绝缘造成极大的危害。本文在分析操作过电压的产生原因及性质后 ,提出了一种新应用的方法 --有限元法来分析操作过电压对电机的绝缘影响 ,同时监测定子槽中绝缘介质的场强状况以此对电机内部绝缘状态实施在线监测和预测分析。更多还原

【Abstract】 Now, the vacuum breaker is used in power system as the major installation. But switching the breaker often causes the high over-voltage mostly, which will do great damage to the insulation of the motor stator. The reasons and characteristics of switching over-voltage are analyzed in this paper, and the paper analyzes the field intensity changes in motor stator insulation medium caused by over-voltage by the finite element method, which can do safe prediction on-line and provide a new method to on-line insulation.更多还原