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河床式水电站过渡过程涌波对机组运行有明显影响,当电站布置于中隔岛洲的多条江汊上时,涌波问题尤为突出。对此,采用已验证的Delft3D二维模型,模拟分析了涌波大小的影响因素、涌波组成成分、涌波传播和反射规律,回答了最大涌波产生工况、涌波影响范围、涌波主波特点等问题,并具体模拟了某两岛三江上实际水电站的涌波特性,指出多江之间往复传播的纵向涌波是最主要的涌波成分。研究成果可为类似水电站的设计和运行调度提供参考。
Fluctuations in the transition process of riverbed hydropower stations have a significant impact on the operation of the units. The surge problem is particularly prominent when the power plants are arranged on a number of rivers and lakes in the mid-island island. In this regard, the verified Delft3D two-dimensional model is used to simulate and analyze the factors affecting the size of the surge, the composition of the surge, the propagation and reflection of the surge, the problems of the maximum surge generation, the impact range of the surge, and the dominant wave of the surge. The surge characteristics of the actual hydropower stations on two islands and three rivers are simulated in detail. It is pointed out that the longitudinal surge that reciprocates between multiple rivers is the main surge component. The research results can provide reference for the design and operation scheduling of similar hydropower stations.