【摘要】 大型水轮发电机组运行时定子线棒存在损耗发热，由于构成定子线棒的导线和防晕材料与主绝缘材料在热力学性能上存在差异，导致两者间的粘接面存在热应力，长期的热应力疲劳会导致粘接面发空分层进而发生局部放电，影响机组可靠运行。本文采用全场应变测量分析法、盲孔法和纳米压痕应变法对定子线棒热应力分布进行测量分析，为大型发电机组定子线棒绝缘结构优化设计提供依据。更多还原

【Abstract】 There is loss and heat in stator bar of large hydroelectric generating unit during operation, the thermal stress on the bonding surface is caused by the difference in the thermodynamic properties of the conductor and the anti-corona material and the main insulation material that constitute the stator bar. Long-term thermal stress fatigue leads to air separation of the bonding surface and partial discharge, which will affect the reliable operation of the unit. In this paper, the FSSM-DIC(Full-Scale Strain Measurement using Digital Image Correlation) method, blind-hole method and nanoindentation strain method are used to measure and analyze the thermal stress distribution of stator bars, which provides a basis for the optimal design of stator bar insulation structure of large generator units.更多还原