Long - term optimal control of hydroelectric power plants plays an important role in improving the utilization efficiency of the water resource, but it is not elaborate to calculate the calculation results of the optimization model by using the established output power. Speaking of this problem, in general, the hydraulic turbine efficiency in the total efficiency of hydroelectric power plants depends on the power generation head and power. Changes in the generation head during the mid-long-term operation of hydroelectric power plants lead to changes in the efficiency of the turbines. The relationship between power generation head - output and efficiency is show in the overall operating characteristic curve of the turbines. However, considering the calculation methods so far, it is consider that the average output power is use in the mid - to long - term optimal control of the stepped hydroelectric power plant and the calculation is not detailed and the operation characteristics of the turbines are not considered. In this case, the total operating characteristic curve of the turbine is use to obtain the change of the turbine efficiency according to the change of the generation water head of the long-term optimum control process of the hydroelectric power plant, and the output of the power plant is obtained based in theory. As shown in the long series calculation of the stair Step hydroelectric power station of Chong-chon River, the relative error of the between this method and multi - year average generation amount of stationary side method is 2.7%, which is more suitable for production practice. Therefore, this method has a relatively good reference effect on the development of mid - and long - term subdivision management of stepped hydroelectric power plants.
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[v1] 2018-03-01 21:29:03
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