桃源电站1号机组上导流板脱落原因分析及处理

Cause analysis of upper flow deflector detachment of No.1 generator unit in Taoyuan Hydropower Station and treatment

桃源水电站1号机组投入商业运行已经15个月,在C级检修期间,发现其上导流板脱落在前流道内,为此,业主单位邀请相关方面专业人员实施现场勘查,以深入分析事故原因。考虑到业主的经济损失、修复工期等因素,经过反复谨慎的分析研究,最终选定了最佳修复方案。实施修复处理以后,机组的运行状态稳定,表明修复效果良好。针对该事故的发生背景、流道内部检查结果、事故原因分析、修复方案的研讨过程及确定,以及修复处理过程作了详细介绍。

No. 1 generator unit of Taoyuan Hydropower Station has been put into operation for 15 months. As the upper flow deflector of the generator was found in Class-C overhaul to have detached from the generator and fallen into the upstream flow channel, the project owner asked specialists in related fields to conduct a field investigation to analyze the cause of the accident. Considering the economic loss of the project owner and the treatment duration, the optimal treatment scheme was selected through repeated and meticulous research and analysis. After the repair work, the unit was restored to stable operation, which proved the satisfactory effects of the treatment. The background of the accident, the inspection results of the interior of the flow channel, the cause analysis of the accident, the process of designing and determining the treatment scheme, and the treatment procedures are introduced in details.