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首页> 外文会议>2nd International Conference on Silting Problems in Hydropower Plants Sep 26-28, 2001 Bangkok, Thailand >SILTING PROBLEMS IN HYDRO POWER PLANTS AND THEIR REMEDIAL MEASURES
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SILTING PROBLEMS IN HYDRO POWER PLANTS AND THEIR REMEDIAL MEASURES

机译：水电厂的选矿问题及其补救措施

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Himalaya is the seat of largest source of surface water resources on the Indian sub-continent. So, most of the hydropower stations in this region carry lot of silt especially during monsoon season due to poor geological conditions in Himalayan regions. This silt affects the reservoir capacity but also cause erosion of civil structures as well as damages electro-mechanical equipment with the result it leads to deterioration in over all efficiency and performance in the generating units. This problem is more serious for run-of-the river schemes located on Himalayan rivers and a wider look on the problem is required, which extends from catchment area treatment to desilting provisions before water is fed to penstocks, and then to turbine and cooling water system. So, the stress on effectively tackling the problem should be laid right at project planning stage itself. Since the silt problem is known from several decades, it has been attracting serious attention of hydropower experts and desilting arrangements are being designed after incorporating lesson learnt from earlier projects. The effect of silt on three broad areas are (a) the civil structures (b) turbine and (c) cooling water system. Certain remedial measures are being taken up in the projects where desilting provisions either could not be included during construction or did not prove effective to the expected level. On electro-mechanical front experimental coating of turbine guide vanes with ceramic and plasma nitriding are taken up. With a view to minimise the damage to the equipment due to excessive silt in the cooling water system, a simple and cost effective closed circuit silt free cooling water system can be developed. Such a system when implemented will invariably improve the performance of such hydropower stations.
机译：喜马拉雅山是印度次大陆最大的地表水资源所在地。因此，由于喜马拉雅地区的地质条件恶劣，该地区的大多数水电站特别是在季风季节携带大量泥沙。这种淤泥不仅影响水库的蓄水能力，而且还会侵蚀土木结构，并损坏机电设备，从而导致发电机组的整体效率和性能下降。对于位于喜马拉雅河上的过流方案来说，这个问题更加严重，需要对此问题进行更广泛的研究，从集水区处理到在将水供应到压力供水之前的清淤准备，再到涡轮机和冷却水。系统。因此，有效解决问题的重点应该放在项目计划阶段本身。由于淤泥问题已经有几十年的历史了，它已经引起了水电专家的严重关注，并且在汲取了从早期项目中学到的教训之后，正在设计淤泥布置。淤泥对三个广泛领域的影响是（a）土木结构（b）涡轮机（c）冷却水系统。在项目中正在采取某些补救措施，这些措施中，可能无法在施工过程中包括清淤规定，或者未能证明其达到预期水平。在机电正面，对涡轮导向叶片进行了陶瓷和等离子渗氮的实验涂层。为了最小化由于冷却水系统中过多的淤渣而对设备造成的损害，可以开发一种简单且成本有效的闭路无淤渣冷却水系统。当实施这种系统时，将始终提高这种水力发电站的性能。

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