水电站全厂振动区及最优动力特性曲线研究

水电机组振动区的存在直接影响水电站厂内安全运行,研究考虑振动区的水电站最优动力特性曲线是实现水电站厂内经济运行的基础。首先在机组具有单振动区时利用组合数学推导出全厂振动区,分析表明水电站全厂振动区与水电站机组台数、机组振动区宽度及位置有关;然后根据全厂振动区通过引入惩罚函数求出水电站最优动力特性曲线。实例结果表明,水电站最优动力特性曲线考虑振动区时具有分段不光滑、不连续等特征,部分区域为避免机组运行在振动区发电流量有所增加。

Research on Whole Vibration Area and Optimal Dynamic Characteristic Curve of Hydropower Station

The vibration area of hydropower generating set affects the safe operation of hydropower station. Research on optimal dynamic characteristic curve of hydropower station is a basis for economic operation of hydropower station. Firstly, the vibration area of the whole station with the single unit vibration area is obtained by combinational mathematics, and the whole vibration area has the relationships with the number of units, width and position of the single vibration area of a unit. Secondly, the optimal dynamic characteristic curve of the hydropower station is determined by the whole vibration area and penalty function. The simulation results show that when considering the vibration area, optimal dynamic characteristic curve of hydropower has non-smooth, discontinuous features, and generating flow is increased for avoiding vibration area of unit operation.