长洲水利枢纽机组出流量计算曲线修正研究

Study on Amendment of Unit Discharge Calculated Curve of Changzhou Hydraulic Complex

通过对机组过流量和实际出库流量相差较大,尤其在泄水闸门全部关闭状态下,只有机组过流量时,进行了深入分析,认为厂家和设计单位提供的N^H~Q计算流量偏小10%~15%。根据数理统计学理论,对长洲水利枢纽电站的N^H~Q曲线进行了局部修正,得出了发电水头大于12 m时新N^H~Q曲线。经后期的实际应用研究,表明修正后机组过流量计算精度较高,达到了预期的效果。

Based on in-depth analysis on large difference between flow out of the unit and actual discharge from the reservoir, especially only left over the flow out of the unit when all sluice gates are closed, this article argues that the NHQ calculated flow provided by manufacturers and design units is 10% to 15% less. A partial revision is made to the NHQ curve of Changzhou Hydraulic Complex according to the mathematical statistics theory to get a new NHQ curve with a power head of more than 12 meters. The practical application later on shows that the revised flow out of the unit is more accurate to achieve desirable results.