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三起水机保护动作事件简析

2024-04-12

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云南水电站 张志林

水机保护主要是轴瓦(上导、推力、下导和水导)温度升高、(调速器、主阀)事故低油压、导叶剪断销剪断、机组过速等,因水机保护回路元器件多,运行维护不到位将引起水机保护动作,造成机组非计划停运,给企业造成损失。笔者结合工作实际,简要汇总分析3起典型水机保护事件(如下表),希望给作为水电站的同行们有点帮助,不足之处,望指正为盼。

经验反馈:

对于水机保护,电厂应重点关注调速器、蝶(球)阀油压控制系统的元器件和回路的可靠和稳定,关注水机保护相关隐蔽部位的设备健康水平,选择质量品牌过硬的控制元器件(温控表、压力控制仪器),加强水机保护关键回路及硬件的维护,定期开展技术监督校验工作,有效避免水机保护动作跳机事件重复发生。

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