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高压电器  2015 

刘家峡水电厂5号机组扩修后稳定性分析

, PP. 42-46

Keywords: 运行稳定性, 试验研究, 振动

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Abstract:

目前水轮发电机组稳定性问题日益严重,相当一部分水电厂机组在某些运行区域存在振动问题。文中针对刘家峡水电厂5号机组展开试验,研究了引起水轮发电机组运行不稳定的原因,根据刘家峡水电厂机组的实际情况,确定了机组稳定性试验的主要观注测量、测试点的布置以及传感器的选择。针对刘家峡水电厂运行中存在的实际问题,对5号机组分别进行了变转速试验、变励磁试验和变负荷试验。现场试验结果表明5号机组扩修后,发电机的电磁力平衡状态良好,且机组的振动与蜗壳、顶盖和尾水管内的压力脉动关系密切,但水轮机轴与发电机转子连接不正。

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