发电机定子绕组中放电脉冲传播规律的实验研究

研究了在大型汽轮发电机定子绕组中，局部放电产生的陡前沿脉冲传播这一复杂的电磁暂态过程。介绍了在１００ＭＷ和２００ＭＷ的汽轮发电机定子绕组下线过程中，对单根线棒、半相绕组、单相绕组、三相绕组，施加以陡前沿脉冲及其响应的实测结果。波形记录采用高速的数字示波器ＨＰ５４５０２Ａ。通过对实验结果的分析处理，得到了陡前沿放电脉冲在定子绕组中传播的衰减与延迟的规律，和绕组的频率特性。研究的结果可为大型发电机定子绕组绝缘状态监测提供必要的依据

Experimental study of the pulse propagation in turbine generator stator windings

To study on the partial discharge pulse propagation in turbine generator stator windings, which is correlated with condition monitoring of the generator insulation system, the extensive tests have been conducted respectively on a 100 MW stator windings and a 200 MW stator windings which are all undergoing manufacture. The results tested in a isolated bar, on a coil surrounding coils earthed, on a half phase windings as well as the finished phase windings in turn, are reported. The frequency characteristics, decay and delay of partial discharge pulse propagation in the stator windings are presented.