发电机转子匝间测试及其实践应用的研究

Research on Generator Rotor Inter Turn Test and Its Practical Application

船用发电机的转子绕组因通过电压低、电流小、结构比定子简单等原因,在日常电机制造及检验过程中,匝间绝缘的监测容易忽视,而且IEC 60034以及IEC 60092等国际电工委员会颁布的标准中也没有对此提出明确要求。但是,基于对产品质量及性能的可靠性保障,转子匝间耐压测试是有必要的,特别对高压电机产品的转子匝间绝缘监测,以验证匝间绝缘对陡峭前沿的操作过电压的承受能力。以制造厂进行的高压发电机转子匝间试验为例,介绍了测试方法、故障现象及异常分析三部分内容,包含了以脉冲波形判断发电机转子部分的绝缘异常,以及制造过程中接地电阻的问题。

In the daily process of manufacturing and testing electric motors, the inter-turn insulation monitoring of marine generator rotor winding is easy to be ignored due to its low voltage and small current, the simpler structure than the stator, also the standards such as IEC60034 and IEC60092 which International Electroteehnical Commission issued have no explicit requirement. However, based on the reliability of product＇ s quality and function, it is necessary to test the rotor inter-turn voltage, especially to the inter-turn insulation monitoring of high-voltage generator rotor winding in order to demonstrate a satisfactory withstand level of the inter-turn insulation to steep fronted switching surges. The article take the high-vohage generator rotor winding inter-turn test as an example, introducing the test methods, the failure phenomenon and abnormal analysis, including the problem of judging the insulation abnormal on generator rotor part by pulse waveform, and earth resistance in the manufacturing process.