大型发电机定子线圈带水测量介损方法

摘要

According to the problem of high voltage and measuring dielectric loss for water cooling stator winding of large generator, the new method for measuring dielectric loss of the stator winding was proposed. Through changing the way of connection, the method can shield ideally the infection of cooling water, and parameter can be measured in 50 Hz rated voltage. Theoretical analysis and experimental results show that the new method is accurate and reliable to measure dielectric loss and capacitance, and can solve the difficult problem of measuring dielectric loss of stator winding in rated voltage and with cooling water, and work efficiency can be improved greatly.%针对大型发电机出线电压高、额定电压下带水测量线圈介损困难的问题,提出了一种大型发电机定子线圈带水测量介损新方法.该方法通过接线方式变化成功屏蔽定子水回路对介损测量的影响,可以结合发电机的工频耐压试验一起进行测量.试验室模拟试验和现场实际测量表明,该方法测量准确、方便易行,成功解决了大型发电机定子线圈在额定电压下带水测量介损的问题,大大提高了工作效率.