摘要
在电力系统中普遍采用真空断路器来实现配电网无油化,但是真空断路器开合时易产生的操作过电压对电动机的绝缘造成极大的危害。在分析操作过电压的产生原因及性质后,提出了应用有限元法分析操作过电压对电机的影响,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安全预测分析。
Vacuum breaker is generally used in power system as the major installation for distribution network. But the breaker switching often causes high over-voltage mostly, which will do great damage to the insulation of the motor stator. After analyzing the reasons and characteristics of switching over-voltage, this paper proposes a new method of using the finite-element method to analyse the effect of switching over-voltage on motor and monitor the field intensity change in insulation medium of motor stator, with which realizing the analysis of on-line safty prediction for motor internal insulation.
出处
《继电器》
CSCD
北大核心
2004年第18期43-45,63,共4页
Relay
