大型发电机绕组损伤机理和安全分析研究

Study of Safety Monitoring and Damage Mechanism of Windings in Large Generators

为了保护大型发电机安全运行 ,提高大型发电机的故障诊断和监控能力 ,分析了引起接入超高压电网中发电机的过电压的机理和波过程 ,提出和论述了预测操作过电压损伤的安全分析方法 ,给出了相关的数学模型。提出的方法是一种无损伤监测的新方法 ,不需要在发电机内部埋设专用传感器 ,就能实现大型发电机内部绝缘状态的在线监测。

In order to protect large generators and increase the ability of fault diagnosis and monitoring of large generators,this paper analyses the mechanism and wave process of the overvoltage occuring in the generators which are put into the over high voltage power network;and a new safety analysis method of forecasting the damage of operating overvoltage is presented with an important mathematical model.The method presented in this paper is a new monitorting method without any damage to the generators;and the on line monitoring of the inner insulation conditions in large generators can be realized without the specical sensors which may be settled into the generators.