论文部分内容阅读
水电站的出力是与水头成正比例的,对于低水头电站,水头的变化对机组出力影响很大.集雨面积大的水电站和大流量的泵站,在每年汛期,特别是初汛期,河道中常有大量杂草、树枝等污物流滞下来.阻搁在拦污栅上的污物往往会造成较大的水头损失,影响机组出力,垃圾过多时,有可能把拦污栅压垮,直接破坏水力设备,造成停产损失.垃圾大多数情况是下大雨的时候才来,而这个时候正是发电的大好时机,不及时清污就会造成大量的电能损失.用人力清除垃圾,一是劳动强度大,且难以清除拦污栅底层的垃圾;二是用人力清污,操作困难,尤其是遇风雨情况下清污危险性较大.实践证明,用人力清污不仅困难,而且不彻底,或多或少都要造成一些水头损失,影响机组出力.
The output of hydropower station is proportional to the head, and for the low head station, the head variation has a great influence on the output of the unit.Hydropower stations with large catchment area and pumping stations with large flow rate are often used in the annual flood season, especially the first flood season, A large number of weeds, branches and other sluggish flow of stagnation.Risk on the trash rack on the dirt will often cause a greater head loss, affecting the unit output, garbage too much, it is possible to crush the trash rack, the direct destruction of water Equipment, resulting in loss of production.Waste most of the time it is time to come under heavy rain, and this time is a good time for power generation, not timely clean-up will cause a lot of power loss.Using manpower to remove garbage, one labor-intensive , And it is difficult to clear the bottom trash trash trash; the second is to use manual cleaning, the operation is difficult, especially in case of wind and rain more serious clean-up. Practice has proved that cleaning with manpower is not only difficult, but not complete, or more Or less to cause some head loss, affecting the unit output.